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Brunner, Jay F. - One of the best experts on this subject based on the ideXlab platform.
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Control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott (Lepidoptera: Tortricidae) en huertos de manzanos del Estado de Washington (EE.UU.) tratados con diferentes densidades de varias formulaciones atracticidas
Instituto de Investigaciones Agropecuarias INIA, 2013Co-Authors: Curkovic Tomislav, Brunner, Jay F.Abstract:This is the first report on attracticides loaded with 1.6 or 16% pheromone, with or without 6% permethrin, tested for Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott male control. Different densities of attracticide sources (750-3,600 droplets ha-1) homogeneously applied on the canopy were compared in apple (Malus pumila Mill.) orchards. Before attracticide application, no differences in male captures using pheromone baited trap were observed. Afterwards, a significant reduction of captures occurred along with the increasing pheromone concentration, when larger density sources were used. The addition of permethrin into the attracticide formulation, however, did not significantly improve the reduction of males. Overall, these results suggest that mating disruption or other mechanism, instead of the killing effect attributed to attracticides, controlled males. The attracticide formulations matrix reported is suggested to be tested as an alternative to the current ones used for mating disruption. It is suggested to test the attracticide formulation matrix reported as an alternative to the current ones used for mating distuption.Éste es el primer informe del control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott con atracticidas que contengan 1,6 ó 16% de feromona, con o sin permetrina al 6%. Se compararon diferentes densidades de atracticidas (750-3.600 gotas ha-1), aplicadas homogéneamente en la copa de los manzanos (Malus pumila Mill.). Antes de los tratamientos no se observaron diferencias estadísticas en las capturas en trampas cebadas con feromona. Después de aplicar los tratamientos, se observó una reducción significativa en las capturas, al usar mayores concentraciones de feromona y mayores densidades de gotas por hectárea. La incorporación de permetrina en la formulación atracticida no mejoró su actividad en el control de machos. En general, los resultados sugieren que un efecto similar a la confusión de cópula, en lugar de un efecto letal atribuible al atracticida, o bien otro mecanismo, controló a los machos de estas especies. La matriz grasosa usada en la formulación atracticida se sugiere como una alternativa para ser probada respecto de las formulaciones actualmente usadas para confusión de cópula
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Control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott (Lepidoptera: Tortricidae) en huertos de manzanos del Estado de Washington (EE.UU.) tratados con diferentes densidades de varias formulaciones atracticidas.
Instituto de Investigaciones Agropecuarias, 2007Co-Authors: Curkovic T., Brunner, Jay F.Abstract:This is the first report on attracticides loaded with 1.6 or 16% pheromone, with or without 6% permethrin, tested for Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott male control. Different densities of attracticide sources (750-3,600 droplets ha-1) homogeneously applied on the canopy were compared in apple (Malus pumila Mill.) orchards. Before attracticide application, no differences in male captures using pheromone baited trap were observed. Afterwards, a significant reduction of captures occurred along with the increasing pheromone concentration, when larger density sources were used. The addition of permethrin into the attracticide formulation, however, did not significantly improve the reduction of males. Overall, these results suggest that mating disruption or other mechanism, instead of the killing effect attributed to attracticides, controlled males. The attracticide formulations matrix reported is suggested to be tested as an alternative to the current ones used for mating disruption. It is suggested to test the attracticide formulation matrix reported as an alternative to the current ones used for mating distuptionÉste es el primer informe del control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott con atracticidas que contengan 1,6 ó 16% de feromona, con o sin permetrina al 6%. Se compararon diferentes densidades de atracticidas (750-3.600 gotas ha-1), aplicadas homogéneamente en la copa de los manzanos (Malus pumila Mill.). Antes de los tratamientos no se observaron diferencias estadísticas en las capturas en trampas cebadas con feromona. Después de aplicar los tratamientos, se observó una reducción significativa en las capturas, al usar mayores concentraciones de feromona y mayores densidades de gotas por hectárea. La incorporación de permetrina en la formulación atracticida no mejoró su actividad en el control de machos. En general, los resultados sugieren que un efecto similar a la confusión de cópula, en lugar de un efecto letal atribuible al atracticida, o bien otro mecanismo, controló a los machos de estas especies. La matriz grasosa usada en la formulación atracticida se sugiere como una alternativa para ser probada respecto de las formulaciones actualmente usadas para confusión de cópul
Jay F Brunner - One of the best experts on this subject based on the ideXlab platform.
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choristoneura rosaceana harris and pandemis pyrusana kearfott lepidoptera tortricidae male control in washington state usa apple orchards treated with different source densities of several attracticide formulations
Agricultura Tecnica, 2007Co-Authors: Tomislav Curkovic, Jay F BrunnerAbstract:Este es el primer informe del control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott con atracticidas que contengan 1,6 o 16% de feromona, con o sin permetrina al 6%. Se compararon diferentes densidades de atracticidas (750-3.600 gotas ha-1), aplicadas homogeneamente en la copa de los manzanos (Malus pumila Mill.). Antes de los tratamientos no se observaron diferencias estadisticas en las capturas en trampas cebadas con feromona. Despues de aplicar los tratamientos, se observo una reduccion significativa en las capturas, al usar mayores concentraciones de feromona y mayores densidades de gotas por hectarea. La incorporacion de permetrina en la formulacion atracticida no mejoro su actividad en el control de machos. En general, los resultados sugieren que un efecto similar a la confusion de copula, en lugar de un efecto letal atribuible al atracticida, o bien otro mecanismo, controlo a los machos de estas especies. La matriz grasosa usada en la formulacion atracticida se sugiere como una alternativa para ser probada respecto de las formulaciones actualmente usadas para confusion de copula
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choristoneura rosaceana harris and pandemis pyrusana kearfott lepidoptera tortricidae male control in washington state usa apple orchards treated with different source densities of several attracticide formulations control de machos de choristoneura
2007Co-Authors: Tomislav Curkovic, Jay F BrunnerAbstract:A B S T R A C T This is the first report on attracticides loaded with 1.6 or 16% pheromone, with or without 6% permethrin, tested for Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott male control. Different densities of attracticide sources (750-3,600 droplets ha -1 ) homogeneously applied on the canopy were compared in apple (Malus pumila Mill.) orchards. Before attracticide application, no differences in male captures using pheromone baited trap were observed. Afterwards, a significant reduction of captures occurred along with the increasing pheromone concentration, when larger density sources were used. The addition of permethrin into the attracticide formulation, however, did not significantly improve the reduction of males. Overall, these results suggest that mating disruption or other mechanism, instead of the killing effect attributed to attracticides, controlled males. It is suggested to test the attracticide formulation matrix reported as an alternative to the current ones used for mating disruption.
Roy M. - One of the best experts on this subject based on the ideXlab platform.
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Régie des populations de Cydia pomonella (Lepidoptera : Tortricidea) dans les vergers commerciaux du Québec avec des phéromones de synthèse
'Consortium Erudit', 1996Co-Authors: Chouinard G., Vincent C., Langlais G., Roy M.Abstract:Des diffuseurs à phéromones sexuelles de synthèse ont été installés en 1992 et 1993 dans trois vergers de pommiers (Malus pumila) du Québec, à raison de 1000 diffuseurs ha lors d'un essai de régie des populations de carpocapse de la pomme, Cydia pomonella [Lepidoptera : Tortricidae]. De 1991 à 1992, soit après un an d'essai, les dégâts de carpocapse à la récolte sont passés de 54 % à 32 %, de 11 % à 2 %, et se sont maintenus à 0 % dans les vergers à forte, moyenne et faible pressions de carpocapse, respectivement. Après deux ans d'essai, les dégâts sont demeurés au même niveau ou ont été diminués davantage selon le type de programme de répression utilisé contre les autres ravageurs. En 1993, une baisse de 75-100 % des captures a aussi été observée dans les pièges à phéromones par rapport aux captures observées en 1991.Pheromone dispensers were installed in 1992 and 1993, at a rate of 1000 dispensers ha1, in three Quebec apple (Malus pumila) orchards, to reduce populations of the codling moth, Cydia pomonella [Lepidoptera : Tortricidae]. After one year, codling moth damage at harvest decreased from 54% to 32%, from 11% to 2% and remained at 0% in the high, medium and low codling moth pressure orchards, respectively. Damage remained at the same level after the second year, or further decreased, depending on the type of spray program used against other pests. Pheromone trap catches in 1993 also decreased from 75 to 100% when compared to 1991 catches
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État actuel de la lutte biologique contre les acariens phytophages par des acariens prédateurs
'Consortium Erudit', 1993Co-Authors: Roy M.Abstract:Au Québec, la stratégie de lutte contre le tétranyque rouge du pommier (Panonychus ulmi) et le tétranyque à deux points (Tetranychus urticae) dans les vergers de pommier (Malus pumila) repose actuellement sur l'emploi d'acaricides coûteux. Par ailleurs, les consommateurs exigent de plus en plus des fruits exempts de pesticides. Dans ce contexte, l'utilisation de méthodes de lutte non chimiques suscite un grand intérêt auprès des pomiculteurs. Depuis plusieurs années, les efforts de recherche et les essais conduits aux États-Unis et en Europe ont donné un large essor à l'utilisation de souches d'acariens prédateurs résistants à certaines classes de pesticides. Au Québec, des expériences de lutte biologique avec l'acarien prédateur Amblyseius fallacis [Acarina: Phytoseiidae] ont été entreprises depuis quelques années. Cet article se propose d'exposer la problématique de la lutte contre les acariens nuisibles dans les vergers québécois ainsi que les perspectives d'avenir de l'utilisation de la lutte biologique contre ces ravageurs.Quebec's control strategy against mite pests such as Tetranychus urticae and Panonychus ulmi in apple (Malus pumila) orchards relies currently on the use of expensive miticides. However consumers demand pesticide-free fruits. As a result, apple producers are interested in the use of non-chemical control methods. American and european research efforts conducted over many years lead to the increased use of predaceous mite strains resistant to certain categories of pesticides. Biological control experiments conducted in Quebec over the past few years focused on the predaceous mite Amblyseus fallacis [Acarina: Phytoseiidae]. This paper presents the intricate problem of noxious mite control in Quebec apple orchards, as well as future research avenues for the use of biological control against these pests
Wendell L. Roelofs - One of the best experts on this subject based on the ideXlab platform.
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variability in response specificity of apple hawthorn and flowering dogwood infesting rhagoletis flies to host fruit volatile blends implications for sympatric host shifts
Entomologia Experimentalis Et Applicata, 2005Co-Authors: Charles E Linn, Satoshi Nojima, Hattie R Dambroski, Jeffrey L Feder, Stewart H Berlocher, Wendell L. RoelofsAbstract:Rhagoletis pomonella Walsh (Diptera: Tephritidae) originating from domesticated apple (Malus pumila), hawthorn (Crataegus mollis) (Rosaceae), and flowering dogwood (Cornus florida) (Cornaceae) were tested sequentially in flight-tunnel assays to volatile blends previously identified from the three fruit types. The majority of flies flew to odor sources containing their natal blend (68-83%). Some flies from each fruit type also flew to non-natal fruit blends (11-39%), but of these non-natal responders the vast majority were flies that responded to their natal blend as well. The results indicate that individual flies within R. pomonella populations infesting different host types have different degrees of specificity with respect to discriminating among fruit volatile blends, and that a moderate proportion of apple, hawthorn, and dogwood flies (10-30%) are broad responders, with the capacity to recognize and orient to more than one blend. The observed variability in response specificity could facilitate sympatric shifts to new host plants.
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antagonist effects of non host fruit volatiles on discrimination of host fruit by rhagoletis flies infesting apple Malus pumila hawthorn crataegus spp and flowering dogwood cornus florida
Entomologia Experimentalis Et Applicata, 2005Co-Authors: Charles E Linn, Satoshi Nojima, Wendell L. RoelofsAbstract:In previous flight-tunnel tests Rhagoletis pomonella (Walsh) (Diptera: Tephritidae) flies originating from domestic apple (Malus pumila), hawthorn (Crataegus spp.), and flowering dogwood (Cornus florida), displayed greater numbers of upwind flights to blends of volatiles identified from their natal fruit compared to non-natal fruit. Here, we show that when certain non-host volatiles were added to the host blend, significantly fewer apple, hawthorn, and dogwood flies exhibited sustained upwind flight to the source. Specifically, the upwind flight of apple flies to the apple blend was significantly antagonized by the addition of the hawthorn or dogwood blends, the addition of 3-methylbutan-1-ol alone (a key volatile for hawthorn and dogwood flies), or the combination of 3-methylbutan-1-ol and another key dogwood volatile, 1-octen-3-ol. Similarly, the upwind flight of dogwood and hawthorn flies to their respective natal blends was antagonized by the addition of the apple blend or the key apple volatile butyl hexanoate. Experiments were also conducted to determine whether non-natal fruit volatiles could disrupt the close-range flight response of flies to the visual stimulus of fruit alone, represented by an odorless red sphere. Tests with apple-origin flies showed that when the hawthorn blend, the dogwood blend, or the key antagonist volatiles from each (3-methylbutan-1-ol and 1-octen-3-ol) were added to a red sphere fruit mimic, significantly lower proportions of flies were captured, compared with captures when no odor was present. Our results support the hypothesis that agonist and antagonist properties of fruit volatiles can play an important role in host recognition/ discrimination by Rhagoletis flies.
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antagonist effects of non host fruit volatiles on discrimination of host fruit by rhagoletis flies infesting apple Malus pumila hawthorn crataegus spp and flowering dogwood cornus florida
Entomologia Experimentalis Et Applicata, 2005Co-Authors: Charles E Linn, Satoshi Nojima, Wendell L. RoelofsAbstract:In previous flight-tunnel tests Rhagoletis pomonella (Walsh) (Diptera: Tephritidae) flies originating from domestic apple (Malus pumila), hawthorn (Crataegus spp.), and flowering dogwood (Cornus florida), displayed greater numbers of upwind flights to blends of volatiles identified from their natal fruit compared to non-natal fruit. Here, we show that when certain non-host volatiles were added to the host blend, significantly fewer apple, hawthorn, and dogwood flies exhibited sustained upwind flight to the source. Specifically, the upwind flight of apple flies to the apple blend was significantly antagonized by the addition of the hawthorn or dogwood blends, the addition of 3-methylbutan-1-ol alone (a key volatile for hawthorn and dogwood flies), or the combination of 3-methylbutan-1-ol and another key dogwood volatile, 1-octen-3-ol. Similarly, the upwind flight of dogwood and hawthorn flies to their respective natal blends was antagonized by the addition of the apple blend or the key apple volatile butyl hexanoate. Experiments were also conducted to determine whether non-natal fruit volatiles could disrupt the close-range flight response of flies to the visual stimulus of fruit alone, represented by an odorless red sphere. Tests with apple-origin flies showed that when the hawthorn blend, the dogwood blend, or the key antagonist volatiles from each (3-methylbutan-1-ol and 1-octen-3-ol) were added to a red sphere fruit mimic, significantly lower proportions of flies were captured, compared with captures when no odor was present. Our results support the hypothesis that agonist and antagonist properties of fruit volatiles can play an important role in host recognition/ discrimination by Rhagoletis flies.
Tomislav Curkovic - One of the best experts on this subject based on the ideXlab platform.
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choristoneura rosaceana harris and pandemis pyrusana kearfott lepidoptera tortricidae male control in washington state usa apple orchards treated with different source densities of several attracticide formulations
Agricultura Tecnica, 2007Co-Authors: Tomislav Curkovic, Jay F BrunnerAbstract:Este es el primer informe del control de machos de Choristoneura rosaceana (Harris) y Pandemis pyrusana Kearfott con atracticidas que contengan 1,6 o 16% de feromona, con o sin permetrina al 6%. Se compararon diferentes densidades de atracticidas (750-3.600 gotas ha-1), aplicadas homogeneamente en la copa de los manzanos (Malus pumila Mill.). Antes de los tratamientos no se observaron diferencias estadisticas en las capturas en trampas cebadas con feromona. Despues de aplicar los tratamientos, se observo una reduccion significativa en las capturas, al usar mayores concentraciones de feromona y mayores densidades de gotas por hectarea. La incorporacion de permetrina en la formulacion atracticida no mejoro su actividad en el control de machos. En general, los resultados sugieren que un efecto similar a la confusion de copula, en lugar de un efecto letal atribuible al atracticida, o bien otro mecanismo, controlo a los machos de estas especies. La matriz grasosa usada en la formulacion atracticida se sugiere como una alternativa para ser probada respecto de las formulaciones actualmente usadas para confusion de copula
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choristoneura rosaceana harris and pandemis pyrusana kearfott lepidoptera tortricidae male control in washington state usa apple orchards treated with different source densities of several attracticide formulations control de machos de choristoneura
2007Co-Authors: Tomislav Curkovic, Jay F BrunnerAbstract:A B S T R A C T This is the first report on attracticides loaded with 1.6 or 16% pheromone, with or without 6% permethrin, tested for Choristoneura rosaceana (Harris) and Pandemis pyrusana Kearfott male control. Different densities of attracticide sources (750-3,600 droplets ha -1 ) homogeneously applied on the canopy were compared in apple (Malus pumila Mill.) orchards. Before attracticide application, no differences in male captures using pheromone baited trap were observed. Afterwards, a significant reduction of captures occurred along with the increasing pheromone concentration, when larger density sources were used. The addition of permethrin into the attracticide formulation, however, did not significantly improve the reduction of males. Overall, these results suggest that mating disruption or other mechanism, instead of the killing effect attributed to attracticides, controlled males. It is suggested to test the attracticide formulation matrix reported as an alternative to the current ones used for mating disruption.