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Apera Spica-Venti

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Roland Gerhards – One of the best experts on this subject based on the ideXlab platform.

  • In field identification of herbicide resistant Apera Spica-Venti using chlorophyll fluorescence
    Advances in Animal Biosciences, 2017
    Co-Authors: Pei Wang, Gerassimos G. Peteinatos, Roland Gerhards

    Abstract:

    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.

  • Efficacy study and resistance detection for pre-emergence herbicides under greenhouse conditions; a method comparison for pendimethalin
    Julius-Kühn-Archiv, 2014
    Co-Authors: Alexander Menegat, Bernd Sievernich, Roland Gerhards

    Abstract:

    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

  • 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, 2013
    Co-Authors: Dario Massa, Yasmin I. Kaiser, Dionisio Andújar-sánchez, Rocío Carmona-alférez, Jörg Mehrtens, Roland Gerhards

    Abstract:

    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.

Kerlen Dirk – One of the best experts on this subject based on the ideXlab platform.

  • Cossack Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
    Julius-Kühn-Archiv, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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

  • Atlantis Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
    Julius-Kühn-Archiv, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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

  • Cossack Star – a new herbicide in cereals with efficacy against grasses and dicots
    Julius Kühn-Institut, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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

Naunheim Peter – One of the best experts on this subject based on the ideXlab platform.

  • Cossack Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
    Julius-Kühn-Archiv, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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

  • Atlantis Star – ein neues Herbizid zur Bekämpfung von Ungräsern und Unkräutern in Getreide
    Julius-Kühn-Archiv, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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

  • Cossack Star – a new herbicide in cereals with efficacy against grasses and dicots
    Julius Kühn-Institut, 2016
    Co-Authors: Kerlen Dirk, Naunheim Peter

    Abstract:

    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