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Ruide Xue - One of the best experts on this subject based on the ideXlab platform.
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evaluation of deltagard Ground Application against aedes albopictus in a residential area in st augustine florida
Journal of The American Mosquito Control Association, 2016Co-Authors: Lisa L Drake, Jennifer Gibson, Michael L Smith, Muhammad Farooq, Mohamed Sallam, Ruide XueAbstract:Abstract Aedes albopictus is an invasive species that poses a health threat in many residential neighborhoods throughout Florida. Aedes albopictus is a high priority for mosquito control efforts in the state. The efficacy of DeltaGard® (AI 2% deltamethrin) Application against Ae. albopictus was evaluated in a residential area in St. Augustine, FL. DeltaGard was applied using a truck-mounted ultra-low-volume aerosol generator along 3 streets in a residential neighborhood. Caged mosquito mortality and droplet density data were recorded. Leaf clippings from houses on treated streets were bioassayed against laboratory-reared Ae. albopictus. Overall, the DeltaGard Application was found to be more effective in the front yard of the houses, resulting in 78.3% mortality in caged mosquitoes, 42 % mortality in leaf bioassays, and 50.5 nl/cc in spray density. Based on the amount of vegetation and residential barriers around the houses, the Application caused only 46.3% mortality in caged mosquitoes, 7.5% mortality ...
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Ground Application of aquareslin and aquakontrol against anopheles quadrimaculatus aedes aegypti and aedes albopictus
Journal of The American Mosquito Control Association, 2011Co-Authors: James R Brown, Ruide XueAbstract:Abstract Two permethrin formulations, AquaReslin® and AquaKontrol®, were applied by ultra-low volume truck-mounted sprayers on test plots under appropriate meteorological condition at Jacksonville, FL. The method of Application was followed from the product label. The Application rate for each formulation was 0.79 g permethrin per acre. AquaReslin and AquaKontrol demonstrated similar results against Anopheles quadrimaculatus; the former was superior to the latter used against Aedes aegypti, and Ae. albopictus. Teflon®-coated standard glass slides were used to collect the aerosol components. Volume median-diameter droplets per square centimeter varied with pesticides and distance from spray source, and the mortality of the 3 species at 18 h ranged from 61.3% to 91.7%.
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operational note Ground Application of aquareslinh and aquakontrolh against anopheles quadrimaculatus aedes aegypti and aedes albopictus
2011Co-Authors: James R Brown, Ruide XueAbstract:2,3 ABSTRACT. Two permethrin formulations, AquaReslinH and AquaKontrolH, were applied by ultra-low volume truck-mounted sprayers on test plots under appropriate meteorological condition at Jacksonville, FL. The method of Application was followed from the product label. The Application rate for each formulation was 0.79 g permethrin per acre. AquaReslin and AquaKontrol demonstrated similar results against Anopheles quadrimaculatus; the former was superior to the latter used against Aedes aegypti, and Ae. albopictus. TeflonH-coated standard glass slides were used to collect the aerosol components. Volume median-diameter droplets per square centimeter varied with pesticides and distance from spray source, and the mortality of the 3 species at 18 h ranged from 61.3% to 91.7%.
Yael Dubowski - One of the best experts on this subject based on the ideXlab platform.
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primary and secondary pesticide drift profiles from a peach orchard
Chemosphere, 2017Co-Authors: Ohad Zivan, Yardena Bohbotraviv, Yael DubowskiAbstract:Abstract Atmospheric drift is considered a major loss path of pesticide from target areas, but there is still a large gap of knowledge regarding this complex phenomenon. Pesticide drift may occur during Application (Primary drift) and after it (Secondary drift). The present study focuses on primary and secondary drift from Ground Applications in peach orchard (tree height of 3 m), under Mediterranean climate. Detailed and prolonged vertical drift profiles at close proximity to orchard are presented, together with detailed measurements of key meteorological parameters. The effect of volatility on drift was also studied by simultaneously applying two pesticides that differ in their volatility. Drifting airborne pesticides were detected both during and after Applications at sampling distances of 7 and 20 m away from orchard edge. Concentrations ranged between hundreds ng m−3 to a few μg m−3 and showed clear decrease with time and with upwind conditions. Almost no decline in concentrations with height was observed up to thrice canopy height (i.e., 10 m). These homogeneous profiles indicate strong mixing near orchard and are in line with the unstable atmospheric conditions that prevailed during measurements. While air concentrations during pesticide Application were higher than after it, overall pesticide load drifted from the orchard during primary and secondary drift are comparable. To the best of our knowledge this is the first work to show such large vertical dispersion and long duration of secondary drift following Ground Application in orchards. The obtained information indicates that secondary drift should not be neglected in exposure and environmental impact estimations.
Ohad Zivan - One of the best experts on this subject based on the ideXlab platform.
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primary and secondary pesticide drift profiles from a peach orchard
Chemosphere, 2017Co-Authors: Ohad Zivan, Yardena Bohbotraviv, Yael DubowskiAbstract:Abstract Atmospheric drift is considered a major loss path of pesticide from target areas, but there is still a large gap of knowledge regarding this complex phenomenon. Pesticide drift may occur during Application (Primary drift) and after it (Secondary drift). The present study focuses on primary and secondary drift from Ground Applications in peach orchard (tree height of 3 m), under Mediterranean climate. Detailed and prolonged vertical drift profiles at close proximity to orchard are presented, together with detailed measurements of key meteorological parameters. The effect of volatility on drift was also studied by simultaneously applying two pesticides that differ in their volatility. Drifting airborne pesticides were detected both during and after Applications at sampling distances of 7 and 20 m away from orchard edge. Concentrations ranged between hundreds ng m−3 to a few μg m−3 and showed clear decrease with time and with upwind conditions. Almost no decline in concentrations with height was observed up to thrice canopy height (i.e., 10 m). These homogeneous profiles indicate strong mixing near orchard and are in line with the unstable atmospheric conditions that prevailed during measurements. While air concentrations during pesticide Application were higher than after it, overall pesticide load drifted from the orchard during primary and secondary drift are comparable. To the best of our knowledge this is the first work to show such large vertical dispersion and long duration of secondary drift following Ground Application in orchards. The obtained information indicates that secondary drift should not be neglected in exposure and environmental impact estimations.
Susana Monica Licastro - One of the best experts on this subject based on the ideXlab platform.
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thermal behaviour and biological activity against aedes aegypti diptera culicidae of permethrin and pyriproxyfen in a smoke generating formulation
Pest Management Science, 2009Co-Authors: Laura Harburguer, Paola Gonzalez Audino, Hector Masuh, Emilia Seccacini, Eduardo Zerba, Susana Monica LicastroAbstract:BACKGround: The most common ways to control dengue vector Aedes aegypti (L.) are larval source reduction in domestic habitats and Ground Application of small quantities of aerosol insecticide (ultralow volume). Nevertheless, these actions have been shown repeatedly to be ineffective in controlling Ae. aegypti populations. RESULTS: The efficacy of a new smoke-generating formulation containing pyriproxyfen and permethrin was evaluated in the laboratory. Smoke-generating tablets containing each insecticide individually or combined were prepared, and the recovery of the insecticides from the smoke was determined. Recovery values of over 90% were obtained for pyriproxyfen, and around 50% for permethrin. The biological efficacy of pyriproxyfen released in the smoke was evaluated in the laboratory, on late third-instar or early fourth-instar Ae. aegypti larvae, using different concentrations of pyriproxyfen and exposure times. Adult emergence inhibition (EI) values of 100% were obtained at 30 min, and a dose-dependent effect was observed at 5 min. The effect of pyriproxyfen released in the smoke was due to direct contact with the larvicide in the water rather than by inhalation of the fumes. The efficacy of permethrin released in the fumes was also evaluated as knockdown effect (KT50) on adults for a tablet containing permethrin alone or permethrin plus pyriproxyfen. There was no significant difference in KT50 values obtained for permethrin (KT50 = 19.9 min) and permethrin plus pyriproxyfen (KT50 = 19.4 min). CONCLUSION: The excellent laboratory performance of this new formulation on immature stages and adults indicates that a smoke-generating tablet containing pyriproxyfen and permethrin could be a new tool for controlling mosquitoes. Copyright © 2009 Society of Chemical Industry
James R Brown - One of the best experts on this subject based on the ideXlab platform.
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Ground Application of aquareslin and aquakontrol against anopheles quadrimaculatus aedes aegypti and aedes albopictus
Journal of The American Mosquito Control Association, 2011Co-Authors: James R Brown, Ruide XueAbstract:Abstract Two permethrin formulations, AquaReslin® and AquaKontrol®, were applied by ultra-low volume truck-mounted sprayers on test plots under appropriate meteorological condition at Jacksonville, FL. The method of Application was followed from the product label. The Application rate for each formulation was 0.79 g permethrin per acre. AquaReslin and AquaKontrol demonstrated similar results against Anopheles quadrimaculatus; the former was superior to the latter used against Aedes aegypti, and Ae. albopictus. Teflon®-coated standard glass slides were used to collect the aerosol components. Volume median-diameter droplets per square centimeter varied with pesticides and distance from spray source, and the mortality of the 3 species at 18 h ranged from 61.3% to 91.7%.
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operational note Ground Application of aquareslinh and aquakontrolh against anopheles quadrimaculatus aedes aegypti and aedes albopictus
2011Co-Authors: James R Brown, Ruide XueAbstract:2,3 ABSTRACT. Two permethrin formulations, AquaReslinH and AquaKontrolH, were applied by ultra-low volume truck-mounted sprayers on test plots under appropriate meteorological condition at Jacksonville, FL. The method of Application was followed from the product label. The Application rate for each formulation was 0.79 g permethrin per acre. AquaReslin and AquaKontrol demonstrated similar results against Anopheles quadrimaculatus; the former was superior to the latter used against Aedes aegypti, and Ae. albopictus. TeflonH-coated standard glass slides were used to collect the aerosol components. Volume median-diameter droplets per square centimeter varied with pesticides and distance from spray source, and the mortality of the 3 species at 18 h ranged from 61.3% to 91.7%.
