The Experts below are selected from a list of 504 Experts worldwide ranked by ideXlab platform
Roland Gerhards - One of the best experts on this subject based on the ideXlab platform.
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In field identification of herbicide resistant Apera Spica-Venti using chlorophyll fluorescence
Advances in Animal Biosciences, 2017Co-Authors: Pei Wang, Gerassimos G. Peteinatos, Roland GerhardsAbstract:The WEED-PAM® is a chlorophyll fluorescence sensor. It has already been applied in the detection of herbicide resistant Alopecurus mysuroides populations with promising results. Yet more work needs to be done in order to validate the system’s capabilities in different species. In this study, field experiments were conducted at three sites to clarify the capability of this sensor to detect herbicide resistant Apera Spica-Venti populations. The plants were treated with five different herbicides: three ALS-, one ACCase- and one PS II- inhibitor. Five days after the herbicide treatment, sensor data were gathered. These data were compared with a visual assessment, performed 21 days after the herbicide application. The populations that exhibited a strong resistance to the ALS and PS II inhibitors could be differentiated from the sensitive ones. Yet the Apera Spica-Venti population with a low resistance level to the ACCase inhibitors cannot be differentiated from the sensitive population.
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Efficacy study and resistance detection for pre-emergence herbicides under greenhouse conditions; a method comparison for pendimethalin
Julius-Kühn-Archiv, 2014Co-Authors: Alexander Menegat, Bernd Sievernich, Roland GerhardsAbstract:Aim of the presented study is to demonstrate the impact of two different irrigation methods, from below and from above, and two different pendimethalin formulations, capsule suspension (CS) and suspension concentrate (SC) on the control efficacy of pendimethalin against Silky bent-grass (Apera Spica-Venti) under greenhouse conditions. We assume that changes regarding the efficacy level of pendimethalin due to methodological factors will affect the reliability of resistance detection. Five populations of Silky bent-grass were selected according to their various multi-resistance patterns. One population was a standard sensitive reference population while the remaining four populations are characterized by different resistance patterns against herbicides of the HRAC groups A, B, C2, K1 and N. Pendimethalin dose response studies were performed by taking into account the experimental factors (1) irrigation system and (2) pendimethalin formulation. The results show that a combination of CS-formulation and irrigation from above resulted in a significantly reduced efficacy of pendimethalin independent of the resistance profile of the tested populations. Therefore no differentiation between susceptible and tolerant populations was possible. In contrary the SC-formulation resulted in an overkill situation under irrigation from below even at dosages lower than 20% of the recommended field rate. Thus the differentiation between the resistant and susceptible biotype was impossible as well. For the detection of reduced tolerance against pendimethalin a combination of SCformulation and irrigation from above was found to be favourable and thus this should become the standard procedure for pendimethalin resistance testing. Keywords: Apera Spica-Venti capsule suspension, non-target-site resistance, pendimethalin, resistance detection, suspension concentrate Wirksamkeitsprufung und Resistenzdetektion fur bodenaktive Herbizide; Ein Methodenvergleich am Beispiel Pendimethalin Zusammenfassung Ziel der vorgestellten Versuche ist es, die Auswirkungen unterschiedlicher Methoden der Bewasserung (Beregnung vs. Anstaubewasserung) und unterschiedlicher Formulierungen von Pendimethalin (Kapselsuspension, CS vs. Suspensionskonzentrat, SC) auf die Wirksamkeit von Pendimethalin unter Gewachshausbedingungen zu untersuchen. Es ist anzunehmen, dass Veranderungen der Wirkung auf Grund von methodischen Faktoren sich auf die Verlasslichkeit der Resistenzdetektion auswirken. Funf Windhalm Populationen (Apera Spica-Venti) wurden auf Grund ihrer unterschiedlichen Resistenzprofile fur die Versuche ausgewahlt. Eine der Populationen war eine sensitive Standard-Population. Vier weitere Populationen zeigten Resistenzen gegenuber Wirkstoffen aus den HRAC Gruppen A, B, C2, K1 und N. Fur den Wirkstoff Pendimethalin wurden Dosis-Wirkungs-Versuche durchgefuhrt unter Einbezug der genannten Versuchsparameter (1) Bewasserungsstrategie und (2) Pendimethalin Formulierung. Die durchgefuhrten Versuche haben gezeigt, dass eine Kombination aus CS-Formulierung und Beregnung, unabhangig vom Resistenzprofil der getesteten Population, zu einer eingeschrankten Wirksamkeit von Pendimethalin unter Gewachshausbedingungen fuhrt. Demzufolge war keine Unterscheidung zwischen der sensitiven und der resistenten Population moglich. Im Gegensatz dazu fuhrte die Kombination aus SC-Formulierung und Anstaubewasserung bereits bei Dosierungen von weniger als 20% der empfohlenen Feldaufwandmenge zu 100 % Bekampfungserfolg. Demzufolge war auch hier keine Unterscheidung zwischen der sensitiven und der resistenten Population moglich. Fur die Detektion erhohter Toleranzen gegenuber Pendimethalin hat sich eine Kombination aus SC-Formulierung und Beregnung als vorteilhaft erwiesen. Diese Erkenntnisse sollten bei der Entwicklung eines standardisierten Testverfahrens berucksichtigt werden. Stichworter: Apera spica venti, Kapselsuspension, metabolische Resistenz, Pendimathalin, Resistenzdetektion, Suspensionskonzentrat
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Development of a Geo-Referenced Database for Weed Mapping and Analysis of Agronomic Factors Affecting Herbicide Resistance in Apera Spica-Venti L. Beauv. (Silky Windgrass)
Agronomy, 2013Co-Authors: Dario Massa, Yasmin I. Kaiser, Dionisio Andújar-sánchez, Rocío Carmona-alférez, Jörg Mehrtens, Roland GerhardsAbstract:In this work, we evaluate the role of agronomic factors in the selection for herbicide resistance in Apera Spica-Venti L. Beauv. (silky windgrass). During a period of three years, populations were collected in more than 250 conventional fields across Europe and tested for resistance in the greenhouse. After recording the field history of locations, a geo-referenced database has been developed to map the distribution of herbicide-resistant A. Spica-Venti populations in Europe. A Logistic Regression Model was used to assess whether and to what extent agricultural and biological factors (crop rotation, soil tillage, sowing date, soil texture and weed density) affect the probability of resistance selection apart from the selection pressure due to herbicide application. Our results revealed that rotation management and soil tillage are the factors that have the greatest influence on the model. In addition, first order interactions between these two variables were highly significant. Under conventional tillage, a percentage of winter crops in the rotation exceeding 75% resulted in a 1280-times higher risk of resistance selection compared to rotations with less than 50% of winter crops. Under conservation tillage, the adoption of >75% of winter crops increased the risk of resistance 13-times compared to rotations with less than 50% of winter crops. Finally, early sowing and high weed density significantly increased the risk of resistance compared to the reference categories (later sowing and low weed density, respectively). Soil texture had no significant influence. The developed model can find application in management programs aimed at preventing the evolution and spread of herbicide resistance in weed populations.
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Two-year Investigations on Herbicide-Resistant Silky Bent Grass (Apera Spica-Venti L. Beauv.) Populations in Winter Wheat—Population Dynamics, Yield Losses, Control Efficacy and Introgression into Sensitive Population
Gesunde Pflanzen, 2011Co-Authors: Roland Gerhards, D. MassaAbstract:In dieser Studie werden zweijährige Untersuchungen mit herbizidresistenten Populationen von Windhalm ( Apera Spica-Venti ) vorgestellt. Zwei Windhalm-Populationen wurden im Herbst 2008 in einem Feldexperiment mit Winterweizen auf der Versuchsstation Ihinger Hof eingesät. Zuvor durchgeführte Gewächshaus-Biotests mit Pflanzen im Jungendstadium zeigten, dass Population A stark resistent gegenüber Acetolaktat-Synthase (ALS)-Inhibitoren war. Population B war sensitiv gegenüber dieser Herbizidgruppe. Die Parzellen mit beiden Populationen wurden mit Isoproturon, Fenoxaprop-P-ethyl, Sulfosulfuron und Meso-Iodosulfuron in der empfohlenen Aufwandmenge behandelt. Eine Variante blieb unbehandelt. Das Experiment wurde als randomisierte Blockanlage in beiden Jahren an der gleichen Position im Feld angelegt. Die durchschnittliche Windhalmdichte war 2010 mit 343 Rispen m^− ^2 in der unbehandelten Kontrolle signifikant höher als 2009 mit 44 Rispen m^− ^2. Der Bekämpfungserfolg beider ALS-Inhibitoren war in der resistenten Population signifikant geringer als in der sensitiven Population. Die mit ALS-Inhibitoren behandelten Windhalmpflanzen produzierten gleich viele Samen wie die unbehandelten Pflanzen. Die Keimrate der Samen aus der resistenten Population war mehr als dreimal wie die Keimrate der Samen aus der sensitiven Population. Der Weizenertrag war 2009 in allen Varianten gleich. In 2010 lagen die Kornerträge in den Parzellen mit Isoproturon und Fenoxaprop-P-ethyl mit durchschnittlich 4.6 t ha^− ^1 tendenziell höher als in den Varianten mit Sulfosulfuron und Meso-Iodosulfuron, die im Mittel 3.9 t ha^− ^1 erzielten. In der unbehandelten Kontrolle wurden 4.3 t ha^− ^1 Kornertrag geerntet. Allerdings waren diese Ertragunterschiede statistisch nicht signifikant verschieden. Die 2009 geerntete sensitive Population von Windhalm war um 20 % weniger empfindlich gegenüber den ALS-Inhibitoren als die 2008 gesäte sensitive Population. Diese Ergebnisse lassen auf eine Auskreuzung der Herbizidresistenz von der resistenten in die sensitive Population bereits nach einem Jahr schließen. Die Ergebnisse dieser Studie belegen die schnelle Ausbreitung und die hohen ökonomischen Verluste durch die Resistenz gegen ALS-Inhibitoren in Windhalm. Daher sollten gezielte Verfahren zur Vermeidung und Bekämpfung der Herbizidresistenz im Europäischen Getreidebau entwickelt und erprobt werden. In this study, the results of two-year investigations on herbicide resistance in silky bent grass ( Apera Spica-Venti ) populations are presented. Two populations of A. Spica-Venti were sown in a winter wheat field at the Ihinger Hof Research Station near Stuttgart in Germany in October 2008. Whole-plant bioassays conducted with both populations in the greenhouse before the field trial was set up revealed that population A was strongly resistant to acetolactate synthase (ALS)-inhibitors, whereas population B was sensitive to this group of herbicides. Each block was treated with isoproturon, fenoxaprop-P-ethyl, sulfosulfuron and meso-iodosulfuron at the recommended field dose. One treatment remained unsprayed. It was found that the average number of silky bent grass panicles was significantly higher in the second year (2010) with 343 panicles m^− ^2 in the untreated control compared to 44 panicles m^− ^2 in the first year (2009). Efficacy of both ALS-inhibitors was significantly reduced in the resistant population compared to the sensitive population. Grass-weed plants surviving treatments with ALS-inhibitors produced the same number of seeds as the untreated plants. It was found that germination rate of seeds from the resistant population was more than threefold higher than from the sensitive population. Grain yield was equal in all treatments and populations in 2009. In 2010, applications of isoproturon and fenoxaprop-P-ethyl resulted in higher grain yields, with a mean of 4.6 t ha^− ^1 compared to an average of 3.9 t ha^− ^1 in the plots treated with sulfosulfuron and meso-iodosulfuron and 4.3 t ha^− ^1 in the untreated plots. However, these differences were not statistically significant. The sensitive population of the second generation (2009/2010) was approximately 20% more tolerant to ALS-inhibitors than the sensitive population of the first generation (2008/2009) which indicates introgression of herbicide resistance traits already after one year. These results clearly show that herbicide resistance to ALS-inhibitors in silky bent grass is likely to spread rapidly causing significant economic losses. Therefore, management strategies need to be developed and tested to prevent and overcome herbicide resistance in European cereal production systems.
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Two-year Investigations on Herbicide-Resistant Silky Bent Grass (Apera Spica-Venti L. Beauv.) Populations in Winter Wheat—Population Dynamics, Yield Losses, Control Efficacy and Introgression into Sensitive Population
Gesunde Pflanzen, 2011Co-Authors: Roland Gerhards, Dario MassaAbstract:In this study, the results of two-year investigations on herbicide resistance in silky bent grass (Apera Spica-Venti) populations are presented. Two populations of A. Spica-Venti were sown in a winter wheat field at the Ihinger Hof Research Station near Stuttgart in Germany in October 2008. Whole-plant bioassays conducted with both populations in the greenhouse before the field trial was set up revealed that population A was strongly resistant to acetolactate synthase (ALS)-inhibitors, whereas population B was sensitive to this group of herbicides. Each block was treated with isoproturon, fenoxaprop-P-ethyl, sulfosulfuron and meso-iodosulfuron at the recommended field dose. One treatment remained unsprayed. It was found that the average number of silky bent grass panicles was significantly higher in the second year (2010) with 343 panicles m− 2 in the untreated control compared to 44 panicles m− 2 in the first year (2009). Efficacy of both ALS-inhibitors was significantly reduced in the resistant population compared to the sensitive population. Grass-weed plants surviving treatments with ALS-inhibitors produced the same number of seeds as the untreated plants. It was found that germination rate of seeds from the resistant population was more than threefold higher than from the sensitive population. Grain yield was equal in all treatments and populations in 2009. In 2010, applications of isoproturon and fenoxaprop-P-ethyl resulted in higher grain yields, with a mean of 4.6 t ha− 1 compared to an average of 3.9 t ha− 1 in the plots treated with sulfosulfuron and meso-iodosulfuron and 4.3 t ha− 1 in the untreated plots. However, these differences were not statistically significant. The sensitive population of the second generation (2009/2010) was approximately 20% more tolerant to ALS-inhibitors than the sensitive population of the first generation (2008/2009) which indicates introgression of herbicide resistance traits already after one year. These results clearly show that herbicide resistance to ALS-inhibitors in silky bent grass is likely to spread rapidly causing significant economic losses. Therefore, management strategies need to be developed and tested to prevent and overcome herbicide resistance in European cereal production systems.
Kerlen Dirk - One of the best experts on this subject based on the ideXlab platform.
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Cossack Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
Julius-Kühn-Archiv, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Cossack Star (Mesosulfuron-methyl; Iodosulfuron-methyl-sodium; Thiencarbazone-methyl; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides), Weidelgras-Arten (Lolium spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L.), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann zur Frühjahrsapplikation in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.) eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Cossack Star im Nachauflaufeinsatz im Frühjahr. Cossack Star – a new herbicide in cereals with efficacy against grasses and dicotsCossack Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Cossack Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Cossack Star
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Atlantis Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
Julius-Kühn-Archiv, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis Star (Mesosulfuron-methyl; Iodosulfuron-methyl-sodium; Thiencarbazone-methyl; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides; sensitiv und Problemstandorte), Trespen-Arten (Bromus spec.), Weidelgras-Arten (Lolium spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L.), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.) im Nachauflauf Frühjahr eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Atlantis Star im Nachauflaufeinsatz im Frühjahr.Atlantis Star – a new herbicide in cereals with efficacy against grasses and dicotsAtlantis Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides; sensitive and high infestation), brome grass (Bromus spec.), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis Star
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Cossack Star – a new herbicide in cereals with efficacy against grasses and dicots
Julius Kühn-Institut, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Cossack Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Cossack Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Cossack Star
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Atlantis Star – a new herbicide in cereals with efficacy against grasses and dicots
Julius Kühn-Institut, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides; sensitive and high infestation), brome grass (Bromus spec.), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis Star
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Atlantis FLEX (BAY 22010 H) – ein neues Herbizid zur Bekämpfung von Ungräsern in Getreide
Julius-Kühn-Archiv, 2014Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis FLEX (Mesosulfuron-methyl; Propoxycarbazone-sodium; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides), Weidelgras-Arten (Lolium spec.), Trespen-Arten (Bromus spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann zur Frühjahrsapplikation in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.)eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Atlantis FLEX im Nachauflaufeinsatz im Frühjahr. Hierbei wird gezeigt, dass Atlantis FLEX gute bis sehr gute Wirksamkeiten in den zuvor genannten Ungräsern erreichen kann.Stichwörter: Alopecurus myosuroides, Bromus spec., Gräserherbizid, Lolium spec., Mesosulfuron-methyl, Propoxycarbazone-sodiumAtlantis FLEX (BAY 22010 H) – a new herbicide in cereals with efficacy against grassesAbstractAtlantis FLEX (Mesosulfuron-methyl; Propoxycarbazone-sodium; Mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), brome grass (Bromus spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis FLEX can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis FLEX. It will be shown, that Atlantis FLEX generates a good to excellent efficacy against grass-weeds.Keywords: Alopecurus myosuroides, Bromus spec., cereal herbicide, Lolium spec., mesosulfuron-methyl, propoxycarbazone-sodiu
Naunheim Peter - One of the best experts on this subject based on the ideXlab platform.
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Cossack Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
Julius-Kühn-Archiv, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Cossack Star (Mesosulfuron-methyl; Iodosulfuron-methyl-sodium; Thiencarbazone-methyl; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides), Weidelgras-Arten (Lolium spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L.), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann zur Frühjahrsapplikation in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.) eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Cossack Star im Nachauflaufeinsatz im Frühjahr. Cossack Star – a new herbicide in cereals with efficacy against grasses and dicotsCossack Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Cossack Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Cossack Star
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Atlantis Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
Julius-Kühn-Archiv, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis Star (Mesosulfuron-methyl; Iodosulfuron-methyl-sodium; Thiencarbazone-methyl; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides; sensitiv und Problemstandorte), Trespen-Arten (Bromus spec.), Weidelgras-Arten (Lolium spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L.), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.) im Nachauflauf Frühjahr eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Atlantis Star im Nachauflaufeinsatz im Frühjahr.Atlantis Star – a new herbicide in cereals with efficacy against grasses and dicotsAtlantis Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides; sensitive and high infestation), brome grass (Bromus spec.), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis Star
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Cossack Star – a new herbicide in cereals with efficacy against grasses and dicots
Julius Kühn-Institut, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Cossack Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Cossack Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Cossack Star
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Atlantis Star – a new herbicide in cereals with efficacy against grasses and dicots
Julius Kühn-Institut, 2016Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis Star (mesosulfuron-methyl; iodosulfuron-methyl-sodium; thiencarbazone-methyl; mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides; sensitive and high infestation), brome grass (Bromus spec.), ryegrass (Lolium spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L.), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis Star can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis Star
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Atlantis FLEX (BAY 22010 H) – ein neues Herbizid zur Bekämpfung von Ungräsern in Getreide
Julius-Kühn-Archiv, 2014Co-Authors: Kerlen Dirk, Naunheim PeterAbstract:Atlantis FLEX (Mesosulfuron-methyl; Propoxycarbazone-sodium; Mefenpyr-diethyl) ist ein neues Getreideherbizid zur Bekämpfung von Acker-Fuchsschwanz (Alopecurus myosuroides), Weidelgras-Arten (Lolium spec.), Trespen-Arten (Bromus spec.), Flughafer (Avena fatua), Gemeinem Windhalm (Apera Spica-Venti L), Einjährigem Rispengras (Poa annua L.) und einjährig zweikeimblättrigen Unkräutern. Das Produkt kann zur Frühjahrsapplikation in den Kulturen Winterweichweizen (Triticum aestivum L.), Wintertriticale (Triticale), Winterroggen (Secale cereale L.), Winterhartweizen (Triticum durum DESF.) und Dinkel (Triticum spelta L.)eingesetzt werden.Der Beitrag befasst sich mit der Auswertung mehrjähriger Versuche hinsichtlich der Wirkung von Atlantis FLEX im Nachauflaufeinsatz im Frühjahr. Hierbei wird gezeigt, dass Atlantis FLEX gute bis sehr gute Wirksamkeiten in den zuvor genannten Ungräsern erreichen kann.Stichwörter: Alopecurus myosuroides, Bromus spec., Gräserherbizid, Lolium spec., Mesosulfuron-methyl, Propoxycarbazone-sodiumAtlantis FLEX (BAY 22010 H) – a new herbicide in cereals with efficacy against grassesAbstractAtlantis FLEX (Mesosulfuron-methyl; Propoxycarbazone-sodium; Mefenpyr-diethyl) is a new cereal herbicide to control blackgrass (Alopecurus myosuroides), ryegrass (Lolium spec.), brome grass (Bromus spec.), wild oat (Avena fatua), loose silky-bentgrass (Apera Spica-Venti L), annual meadow-grass (Poa annua L.) and dicot weeds. Atlantis FLEX can be used in winter wheat, winter triticale, winter rye, winter durum wheat and spelt. The publication is based on efficacy trials from two years of spring application with Atlantis FLEX. It will be shown, that Atlantis FLEX generates a good to excellent efficacy against grass-weeds.Keywords: Alopecurus myosuroides, Bromus spec., cereal herbicide, Lolium spec., mesosulfuron-methyl, propoxycarbazone-sodiu
Michael Kristensen - One of the best experts on this subject based on the ideXlab platform.
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Fitness of ALS-Inhibitors Herbicide Resistant Population of Loose Silky Bentgrass (Apera Spica-Venti).
Frontiers in Plant Science, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Michael Kristensen, Per KudskAbstract:Herbicide resistance is an example of plant evolution caused by an increased reliance on herbicides with few sites of action (SoA) to manage weed populations. This micro-evolutionary process depends on fitness, therefore the assessment of fitness differences between susceptible and resistant populations are pivotal to establish management strategies. Loose silky bentgrass (Apera Spica-Venti) is a serious weed in Eastern, Northern and Central Europe with an increasing number of herbicide resistant populations. This study examined the fitness and growth characteristics of an ALS resistant biotype. Fitness and growth characteristics were estimated by comparing seed germination, biomass, seed yield and time to key growth stages at four crop densities of winter wheat (0, 48, 96 and 192 plants m-2) in a target-neighbourhood design. The resistant population germinated 9 to 20 growing degree days (GDD) earlier than the susceptible population at 10, 16 and 22°C. No differences were observed between resistant and susceptible populations in tiller number, biomass, time to stem elongation, time to first visible inflorescence and seed production. The resistant population reached the inflorescence emergence and flowering stages in less time by 383 and 196 GDD, respectively, at a crop density of 96 winter wheat plants m-2 with no differences registered at other densities. This study did not observe a fitness cost to herbicide resistance, as often hypothesized. Inversely, a correlation between non-target site resistance (NTSR), earlier germination and earlier flowering time which could be interpreted as fitness benefits as these plant characteristics could be exploited by modifying the timing and site of action of herbicide application to better control ALS NTSR populations of A. Spica-Venti.
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De novo transcriptome assembly analysis of weed Apera Spica-Venti from seven tissues and growth stages
BMC Genomics, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Per Kudsk, Khalid Mahmood, Michael KristensenAbstract:Background Loose silky bentgrass ( Apera Spica-Venti ) is an important weed in Europe with a recent increase in herbicide resistance cases. The lack of genetic information about this noxious weed limits its biological understanding such as growth, reproduction, genetic variation, molecular ecology and metabolic herbicide resistance. This study produced a reference transcriptome for A. Spica-Venti from different tissues (leaf, root, stem) and various growth stages (seed at phenological stages 05, 07, 08, 09). The de novo assembly was performed on individual and combined dataset followed by functional annotations. Individual transcripts and gene families involved in metabolic based herbicide resistance were identified. Results Eight separate transcriptome assemblies were performed and compared. The combined transcriptome assembly consists of 83,349 contigs with an N50 and average contig length of 762 and 658 bp, respectively. This dataset contains 74,724 transcripts consisting of total 54,846,111 bp. Among them 94% had a homologue to UniProtKB, 73% retrieved a GO mapping, and 50% were functionally annotated. Compared with other grass species, A. Spica-Venti has 26% proteins in common to Brachypodium distachyon , and 41% to Lolium spp . Glycosyltransferases had the highest number of transcripts in each tissue followed by the cytochrome P450s. The GSTF1 and CYP89A2 transcripts were recovered from the majority of tissues and aligned at a maximum of 66 and 30% to proven herbicide resistant allele from Alopecurus myosuroides and Lolium rigidum, respectively. Conclusions De novo transcriptome assembly enabled the generation of the first reference transcriptome of A. Spica-Venti . This can serve as stepping stone for understanding the metabolic herbicide resistance as well as the general biology of this problematic weed. Furthermore, this large-scale sequence data is a valuable scientific resource for comparative transcriptome analysis for Poaceae grasses.
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De novo transcriptome assembly analysis of weed Apera Spica-Venti from seven tissues and growth stages
BMC Genomics, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Per Kudsk, Khalid Mahmood, Michael KristensenAbstract:Loose silky bentgrass (Apera Spica-Venti) is an important weed in Europe with a recent increase in herbicide resistance cases. The lack of genetic information about this noxious weed limits its biological understanding such as growth, reproduction, genetic variation, molecular ecology and metabolic herbicide resistance. This study produced a reference transcriptome for A. Spica-Venti from different tissues (leaf, root, stem) and various growth stages (seed at phenological stages 05, 07, 08, 09). The de novo assembly was performed on individual and combined dataset followed by functional annotations. Individual transcripts and gene families involved in metabolic based herbicide resistance were identified. Eight separate transcriptome assemblies were performed and compared. The combined transcriptome assembly consists of 83,349 contigs with an N50 and average contig length of 762 and 658 bp, respectively. This dataset contains 74,724 transcripts consisting of total 54,846,111 bp. Among them 94% had a homologue to UniProtKB, 73% retrieved a GO mapping, and 50% were functionally annotated. Compared with other grass species, A. Spica-Venti has 26% proteins in common to Brachypodium distachyon, and 41% to Lolium spp. Glycosyltransferases had the highest number of transcripts in each tissue followed by the cytochrome P450s. The GSTF1 and CYP89A2 transcripts were recovered from the majority of tissues and aligned at a maximum of 66 and 30% to proven herbicide resistant allele from Alopecurus myosuroides and Lolium rigidum, respectively. De novo transcriptome assembly enabled the generation of the first reference transcriptome of A. Spica-Venti. This can serve as stepping stone for understanding the metabolic herbicide resistance as well as the general biology of this problematic weed. Furthermore, this large-scale sequence data is a valuable scientific resource for comparative transcriptome analysis for Poaceae grasses.
Marielle Babineau - One of the best experts on this subject based on the ideXlab platform.
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Fitness of ALS-Inhibitors Herbicide Resistant Population of Loose Silky Bentgrass (Apera Spica-Venti).
Frontiers in Plant Science, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Michael Kristensen, Per KudskAbstract:Herbicide resistance is an example of plant evolution caused by an increased reliance on herbicides with few sites of action (SoA) to manage weed populations. This micro-evolutionary process depends on fitness, therefore the assessment of fitness differences between susceptible and resistant populations are pivotal to establish management strategies. Loose silky bentgrass (Apera Spica-Venti) is a serious weed in Eastern, Northern and Central Europe with an increasing number of herbicide resistant populations. This study examined the fitness and growth characteristics of an ALS resistant biotype. Fitness and growth characteristics were estimated by comparing seed germination, biomass, seed yield and time to key growth stages at four crop densities of winter wheat (0, 48, 96 and 192 plants m-2) in a target-neighbourhood design. The resistant population germinated 9 to 20 growing degree days (GDD) earlier than the susceptible population at 10, 16 and 22°C. No differences were observed between resistant and susceptible populations in tiller number, biomass, time to stem elongation, time to first visible inflorescence and seed production. The resistant population reached the inflorescence emergence and flowering stages in less time by 383 and 196 GDD, respectively, at a crop density of 96 winter wheat plants m-2 with no differences registered at other densities. This study did not observe a fitness cost to herbicide resistance, as often hypothesized. Inversely, a correlation between non-target site resistance (NTSR), earlier germination and earlier flowering time which could be interpreted as fitness benefits as these plant characteristics could be exploited by modifying the timing and site of action of herbicide application to better control ALS NTSR populations of A. Spica-Venti.
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De novo transcriptome assembly analysis of weed Apera Spica-Venti from seven tissues and growth stages
BMC Genomics, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Per Kudsk, Khalid Mahmood, Michael KristensenAbstract:Background Loose silky bentgrass ( Apera Spica-Venti ) is an important weed in Europe with a recent increase in herbicide resistance cases. The lack of genetic information about this noxious weed limits its biological understanding such as growth, reproduction, genetic variation, molecular ecology and metabolic herbicide resistance. This study produced a reference transcriptome for A. Spica-Venti from different tissues (leaf, root, stem) and various growth stages (seed at phenological stages 05, 07, 08, 09). The de novo assembly was performed on individual and combined dataset followed by functional annotations. Individual transcripts and gene families involved in metabolic based herbicide resistance were identified. Results Eight separate transcriptome assemblies were performed and compared. The combined transcriptome assembly consists of 83,349 contigs with an N50 and average contig length of 762 and 658 bp, respectively. This dataset contains 74,724 transcripts consisting of total 54,846,111 bp. Among them 94% had a homologue to UniProtKB, 73% retrieved a GO mapping, and 50% were functionally annotated. Compared with other grass species, A. Spica-Venti has 26% proteins in common to Brachypodium distachyon , and 41% to Lolium spp . Glycosyltransferases had the highest number of transcripts in each tissue followed by the cytochrome P450s. The GSTF1 and CYP89A2 transcripts were recovered from the majority of tissues and aligned at a maximum of 66 and 30% to proven herbicide resistant allele from Alopecurus myosuroides and Lolium rigidum, respectively. Conclusions De novo transcriptome assembly enabled the generation of the first reference transcriptome of A. Spica-Venti . This can serve as stepping stone for understanding the metabolic herbicide resistance as well as the general biology of this problematic weed. Furthermore, this large-scale sequence data is a valuable scientific resource for comparative transcriptome analysis for Poaceae grasses.
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De novo transcriptome assembly analysis of weed Apera Spica-Venti from seven tissues and growth stages
BMC Genomics, 2017Co-Authors: Marielle Babineau, Solvejg K. Mathiassen, Per Kudsk, Khalid Mahmood, Michael KristensenAbstract:Loose silky bentgrass (Apera Spica-Venti) is an important weed in Europe with a recent increase in herbicide resistance cases. The lack of genetic information about this noxious weed limits its biological understanding such as growth, reproduction, genetic variation, molecular ecology and metabolic herbicide resistance. This study produced a reference transcriptome for A. Spica-Venti from different tissues (leaf, root, stem) and various growth stages (seed at phenological stages 05, 07, 08, 09). The de novo assembly was performed on individual and combined dataset followed by functional annotations. Individual transcripts and gene families involved in metabolic based herbicide resistance were identified. Eight separate transcriptome assemblies were performed and compared. The combined transcriptome assembly consists of 83,349 contigs with an N50 and average contig length of 762 and 658 bp, respectively. This dataset contains 74,724 transcripts consisting of total 54,846,111 bp. Among them 94% had a homologue to UniProtKB, 73% retrieved a GO mapping, and 50% were functionally annotated. Compared with other grass species, A. Spica-Venti has 26% proteins in common to Brachypodium distachyon, and 41% to Lolium spp. Glycosyltransferases had the highest number of transcripts in each tissue followed by the cytochrome P450s. The GSTF1 and CYP89A2 transcripts were recovered from the majority of tissues and aligned at a maximum of 66 and 30% to proven herbicide resistant allele from Alopecurus myosuroides and Lolium rigidum, respectively. De novo transcriptome assembly enabled the generation of the first reference transcriptome of A. Spica-Venti. This can serve as stepping stone for understanding the metabolic herbicide resistance as well as the general biology of this problematic weed. Furthermore, this large-scale sequence data is a valuable scientific resource for comparative transcriptome analysis for Poaceae grasses.
