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Philip G. Koehler - One of the best experts on this subject based on the ideXlab platform.
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Nontarget Effects of Aerial Mosquito Adulticiding with Water-Based Unsynergized Pyrethroids on Honey Bees and other Beneficial Insects in an Agricultural Ecosystem of North Greece
Journal of medical entomology, 2014Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Andreas Thrasyvoulou, Georgios Goras, Chrysoula Tananaki, Javid Kashefi, Philip G. KoehlerAbstract:ABSTRACT We assessed the nontarget effects of ultra-low-volume (ULV) aerial adulticiding with two new water-based, unsynergized pyrethroid formulations, Aqua-K-Othrine (FFAST antievaporant technology, 2% deltamethrin) and Pesguard S102 (10% d-Phenothrin). A helicopter with GPS navigation technology was used. One application rate was tested per formulation that corresponded to 1.00 g (AI)/ha of deltamethrin and 7.50 g (AI)/ha of d-Phenothrin. Three beneficial nontarget organisms were used: honey bees (domesticated hives), family Apidae (Apis mellifera L.); mealybug destroyers, family Coccinellidae (Cryptolaemus montrouzieri Mulsant); and green lacewings, family Chrysopidae (Chrysoperla carnea (Stephens)). No significant nontarget mortalities were observed. No bees exhibited signs of sublethal exposure to insecticides. Beehives exposed to the insecticidal applications remained healthy and productive, performed as well as the control hives and increased in weight (25–30%), in adult bee population (14–18%), a...
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Efficacy of Aerial Ultra-Low Volume Applications of Two Novel Water-Based Formulations of Unsynergized Pyrethroids Against Riceland Mosquitoes In Greece
Journal of the American Mosquito Control Association, 2011Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Roxanne Connelly, Jane A. S. Bonds, Philip G. KoehlerAbstract:We assessed the efficacy of ultra-low volume aerial adulticiding with 2 new water-based, unsynergized formulations of Aqua-K-Othrin (2% deltamethrin) and Pesguard S102 (10% d-Phenothrin) against the riceland mosquitoes of Greece. A helicopter with Global Positioning System (GPS) navigation, real-time weather recording, and spray dispersal modeling (AgDISP) was utilized to accurately treat the experimental blocks by adjusting spray line positions to changing meteorological conditions. Two application rates were applied per formulation that corresponded to 0.75 and 1.00 g AI/ha of deltamethrin and 7.50 and 10.00 g AI/ha of d-Phenothrin. The mosquitoes used for the trials were the main nuisance species found in rice field areas of Thessaloniki, which were primarily Aedes caspius, followed by Culex modestus and Anopheles sacharovi. Overall mean mortality of caged mosquitoes was 69.2% and 64.8% for deltamethrin and d-Phenothrin, respectively. Mean population decrease in wild mosquito populations within the treatment areas was 76.5% and 78% for deltamethrin and d-Phenothrin, respectively. The AgDISP dispersal model, coupled with GPS navigation and real-time weather recording, enabled accurate placement of the spray cloud such that the majority of the treatment area received sufficiently high droplet densities to result in uniform caged-mosquito mortality across all sampling sites.
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Effect of Temperature on the Toxicities of Ten Pyrethroids to German Cockroach (Dictyoptera: Blattellidae)
Journal of economic entomology, 1991Co-Authors: Richard W. Wadleigh, Philip G. Koehler, Haiganoush K. Preisler, Richard S. Patterson, Jacqueline L. RobertsonAbstract:Of 10 pyrethroids tested by topical application of male German cockroaches, Blattella germanica (L.), d-Phenothrin was the least toxic at 19, 26, or 31 degrees C. lambda-cyhalothrin was most toxic. Pyrethroids with the alpha-cyano moiety (fluvalinate, fenvalerate, cypermethrin, esfenvalerate, tralomethrin, cyfluthrin, and lambda-cyhalothrin) were more toxic than those without this functional group (d-Phenothrin, resmethrin, and permethrin). At LC50, toxicity was negatively related to temperature. Temperature-toxicity responses of five of seven alpha-cyano pyrethroids were parallel, possibly indicating qualitatively identical but quantitatively different levels of detoxification enzymes.
Alexandra Chaskopoulou - One of the best experts on this subject based on the ideXlab platform.
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Nontarget Effects of Aerial Mosquito Adulticiding with Water-Based Unsynergized Pyrethroids on Honey Bees and other Beneficial Insects in an Agricultural Ecosystem of North Greece
Journal of medical entomology, 2014Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Andreas Thrasyvoulou, Georgios Goras, Chrysoula Tananaki, Javid Kashefi, Philip G. KoehlerAbstract:ABSTRACT We assessed the nontarget effects of ultra-low-volume (ULV) aerial adulticiding with two new water-based, unsynergized pyrethroid formulations, Aqua-K-Othrine (FFAST antievaporant technology, 2% deltamethrin) and Pesguard S102 (10% d-Phenothrin). A helicopter with GPS navigation technology was used. One application rate was tested per formulation that corresponded to 1.00 g (AI)/ha of deltamethrin and 7.50 g (AI)/ha of d-Phenothrin. Three beneficial nontarget organisms were used: honey bees (domesticated hives), family Apidae (Apis mellifera L.); mealybug destroyers, family Coccinellidae (Cryptolaemus montrouzieri Mulsant); and green lacewings, family Chrysopidae (Chrysoperla carnea (Stephens)). No significant nontarget mortalities were observed. No bees exhibited signs of sublethal exposure to insecticides. Beehives exposed to the insecticidal applications remained healthy and productive, performed as well as the control hives and increased in weight (25–30%), in adult bee population (14–18%), a...
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Efficacy of Aerial Ultra-Low Volume Applications of Two Novel Water-Based Formulations of Unsynergized Pyrethroids Against Riceland Mosquitoes In Greece
Journal of the American Mosquito Control Association, 2011Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Roxanne Connelly, Jane A. S. Bonds, Philip G. KoehlerAbstract:We assessed the efficacy of ultra-low volume aerial adulticiding with 2 new water-based, unsynergized formulations of Aqua-K-Othrin (2% deltamethrin) and Pesguard S102 (10% d-Phenothrin) against the riceland mosquitoes of Greece. A helicopter with Global Positioning System (GPS) navigation, real-time weather recording, and spray dispersal modeling (AgDISP) was utilized to accurately treat the experimental blocks by adjusting spray line positions to changing meteorological conditions. Two application rates were applied per formulation that corresponded to 0.75 and 1.00 g AI/ha of deltamethrin and 7.50 and 10.00 g AI/ha of d-Phenothrin. The mosquitoes used for the trials were the main nuisance species found in rice field areas of Thessaloniki, which were primarily Aedes caspius, followed by Culex modestus and Anopheles sacharovi. Overall mean mortality of caged mosquitoes was 69.2% and 64.8% for deltamethrin and d-Phenothrin, respectively. Mean population decrease in wild mosquito populations within the treatment areas was 76.5% and 78% for deltamethrin and d-Phenothrin, respectively. The AgDISP dispersal model, coupled with GPS navigation and real-time weather recording, enabled accurate placement of the spray cloud such that the majority of the treatment area received sufficiently high droplet densities to result in uniform caged-mosquito mortality across all sampling sites.
Marie E. Delorenzo - One of the best experts on this subject based on the ideXlab platform.
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comparative toxicity of pyrethroid insecticides to two estuarine crustacean species americamysis bahia and palaemonetes pugio
Environmental Toxicology, 2014Co-Authors: Marie E. Delorenzo, Katy W. Chung, Yelena Sapozhnikova, Michael H FultonAbstract:Pyrethroid insecticides are widely used on agricultural crops, as well as for nurseries, golf courses, urban structural and landscaping sites, residential home and garden pest control, and mosquito abatement. Evaluation of sensitive marine and estuarine species is essential for the development of toxicity testing and risk-assessment protocols. Two estuarine crustacean species, Americamysis bahia (mysids) and Palaemonetes pugio (grass shrimp), were tested with the commonly used pyrethroid compounds, lambda-cyhalothrin, permethrin, cypermethrin, deltamethrin, and Phenothrin. Sensitivities of adult and larval grass shrimp and 7-day-old mysids were compared using standard 96-h LC50 bioassay protocols. Adult and larval grass shrimp were more sensitive than the mysids to all the pyrethroids tested. Larval grass shrimp were approximately 18-fold more sensitive to lambda-cyhalothrin than the mysids. Larval grass shrimp were similar in sensitivity to adult grass shrimp for cypermethrin, deltamethrin, and Phenothrin, but larvae were approximately twice as sensitive to lambda-cyhalothrin and permethrin as adult shrimp. Acute toxicity to estuarine crustaceans occurred at low nanogram per liter concentrations of some pyrethroids, illustrating the need for careful regulation of the use of pyrethroid compounds in the coastal zone. © 2013 Wiley Periodicals, Inc. Environ Toxicol 29: 1099–1106, 2014.
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Toxicity of the mosquito control insecticide Phenothrin to three life stages of the grass shrimp (Palaemonetes pugio).
Journal of environmental science and health. Part. B Pesticides food contaminants and agricultural wastes, 2011Co-Authors: Peter B. Key, Katy W. Chung, Jennifer Hoguet, Yelena Sapozhnikova, Marie E. DelorenzoAbstract:Phenothrin is a synthetic pyrethroid used as a contact insecticide in mosquito control programs. This study compared the toxicity of Phenothrin to adult, larval and embryonic grass shrimp (Palaemonetes pugio) and examined oxidative stress responses in adult and larval grass shrimp. The adult 24-h LC50 was 0.341 μg/L (95 % confidence intervals 0.282-0.412) and the 96-h LC50 was 0.161 μg/L (95 % CI 0.128-0.203 μg/L). The larval 24-h LC50 was 0.50 μg/L (95 % CI 0.441-0.568) and the 96-h LC50 was 0.154 μg/L (95 % CI 0.139-0.170 μg/L). In the presence of sediment, the 24-h LC50 was 6.30 μg/L (95 % CI 5.00-7.44 μg/L) for adults and 0.771 μg/L (95 % CI 0.630-0.944) for larvae. The sublethal biomarkers glutathione and lipid peroxidase (LPx) were examined after 96-h Phenothrin exposure at five concentrations, and there were no statistically significant differences in these levels in adults or larvae compared to controls. There was a significant downward trend in larval LPx levels. This research confirms that Phenothrin is highly toxic to grass shrimp and suggests that both adult and larval grass shrimp are appropriate life stages for risk assessments.
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toxicity of the mosquito control insecticide Phenothrin to three life stages of the grass shrimp palaemonetes pugio
Journal of Environmental Science and Health Part B-pesticides Food Contaminants and Agricultural Wastes, 2011Co-Authors: Katy W. Chung, Jennifer Hoguet, Yelena Sapozhnikova, Marie E. DelorenzoAbstract:Phenothrin is a synthetic pyrethroid used as a contact insecticide in mosquito control programs. This study compared the toxicity of Phenothrin to adult, larval and embryonic grass shrimp (Palaemonetes pugio) and examined oxidative stress responses in adult and larval grass shrimp. The adult 24-h LC50 was 0.341 μg/L (95 % confidence intervals 0.282–0.412) and the 96-h LC50 was 0.161 μg/L (95 % CI 0.128–0.203 μg/L). The larval 24-h LC50 was 0.50 μg/L (95 % CI 0.441–0.568) and the 96-h LC50 was 0.154 μg/L (95 % CI 0.139–0.170 μg/L). In the presence of sediment, the 24-h LC50 was 6.30 μg/L (95 % CI 5.00–7.44 μg/L) for adults and 0.771 μg/L (95 % CI 0.630–0.944) for larvae. The sublethal biomarkers glutathione and lipid peroxidase (LPx) were examined after 96-h Phenothrin exposure at five concentrations, and there were no statistically significant differences in these levels in adults or larvae compared to controls. There was a significant downward trend in larval LPx levels. This research confirms that pheno...
Roberto M. Pereira - One of the best experts on this subject based on the ideXlab platform.
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Nontarget Effects of Aerial Mosquito Adulticiding with Water-Based Unsynergized Pyrethroids on Honey Bees and other Beneficial Insects in an Agricultural Ecosystem of North Greece
Journal of medical entomology, 2014Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Andreas Thrasyvoulou, Georgios Goras, Chrysoula Tananaki, Javid Kashefi, Philip G. KoehlerAbstract:ABSTRACT We assessed the nontarget effects of ultra-low-volume (ULV) aerial adulticiding with two new water-based, unsynergized pyrethroid formulations, Aqua-K-Othrine (FFAST antievaporant technology, 2% deltamethrin) and Pesguard S102 (10% d-Phenothrin). A helicopter with GPS navigation technology was used. One application rate was tested per formulation that corresponded to 1.00 g (AI)/ha of deltamethrin and 7.50 g (AI)/ha of d-Phenothrin. Three beneficial nontarget organisms were used: honey bees (domesticated hives), family Apidae (Apis mellifera L.); mealybug destroyers, family Coccinellidae (Cryptolaemus montrouzieri Mulsant); and green lacewings, family Chrysopidae (Chrysoperla carnea (Stephens)). No significant nontarget mortalities were observed. No bees exhibited signs of sublethal exposure to insecticides. Beehives exposed to the insecticidal applications remained healthy and productive, performed as well as the control hives and increased in weight (25–30%), in adult bee population (14–18%), a...
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Efficacy of Aerial Ultra-Low Volume Applications of Two Novel Water-Based Formulations of Unsynergized Pyrethroids Against Riceland Mosquitoes In Greece
Journal of the American Mosquito Control Association, 2011Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Roxanne Connelly, Jane A. S. Bonds, Philip G. KoehlerAbstract:We assessed the efficacy of ultra-low volume aerial adulticiding with 2 new water-based, unsynergized formulations of Aqua-K-Othrin (2% deltamethrin) and Pesguard S102 (10% d-Phenothrin) against the riceland mosquitoes of Greece. A helicopter with Global Positioning System (GPS) navigation, real-time weather recording, and spray dispersal modeling (AgDISP) was utilized to accurately treat the experimental blocks by adjusting spray line positions to changing meteorological conditions. Two application rates were applied per formulation that corresponded to 0.75 and 1.00 g AI/ha of deltamethrin and 7.50 and 10.00 g AI/ha of d-Phenothrin. The mosquitoes used for the trials were the main nuisance species found in rice field areas of Thessaloniki, which were primarily Aedes caspius, followed by Culex modestus and Anopheles sacharovi. Overall mean mortality of caged mosquitoes was 69.2% and 64.8% for deltamethrin and d-Phenothrin, respectively. Mean population decrease in wild mosquito populations within the treatment areas was 76.5% and 78% for deltamethrin and d-Phenothrin, respectively. The AgDISP dispersal model, coupled with GPS navigation and real-time weather recording, enabled accurate placement of the spray cloud such that the majority of the treatment area received sufficiently high droplet densities to result in uniform caged-mosquito mortality across all sampling sites.
Mark Latham - One of the best experts on this subject based on the ideXlab platform.
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Nontarget Effects of Aerial Mosquito Adulticiding with Water-Based Unsynergized Pyrethroids on Honey Bees and other Beneficial Insects in an Agricultural Ecosystem of North Greece
Journal of medical entomology, 2014Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Andreas Thrasyvoulou, Georgios Goras, Chrysoula Tananaki, Javid Kashefi, Philip G. KoehlerAbstract:ABSTRACT We assessed the nontarget effects of ultra-low-volume (ULV) aerial adulticiding with two new water-based, unsynergized pyrethroid formulations, Aqua-K-Othrine (FFAST antievaporant technology, 2% deltamethrin) and Pesguard S102 (10% d-Phenothrin). A helicopter with GPS navigation technology was used. One application rate was tested per formulation that corresponded to 1.00 g (AI)/ha of deltamethrin and 7.50 g (AI)/ha of d-Phenothrin. Three beneficial nontarget organisms were used: honey bees (domesticated hives), family Apidae (Apis mellifera L.); mealybug destroyers, family Coccinellidae (Cryptolaemus montrouzieri Mulsant); and green lacewings, family Chrysopidae (Chrysoperla carnea (Stephens)). No significant nontarget mortalities were observed. No bees exhibited signs of sublethal exposure to insecticides. Beehives exposed to the insecticidal applications remained healthy and productive, performed as well as the control hives and increased in weight (25–30%), in adult bee population (14–18%), a...
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Efficacy of Aerial Ultra-Low Volume Applications of Two Novel Water-Based Formulations of Unsynergized Pyrethroids Against Riceland Mosquitoes In Greece
Journal of the American Mosquito Control Association, 2011Co-Authors: Alexandra Chaskopoulou, Mark Latham, Roberto M. Pereira, Roxanne Connelly, Jane A. S. Bonds, Philip G. KoehlerAbstract:We assessed the efficacy of ultra-low volume aerial adulticiding with 2 new water-based, unsynergized formulations of Aqua-K-Othrin (2% deltamethrin) and Pesguard S102 (10% d-Phenothrin) against the riceland mosquitoes of Greece. A helicopter with Global Positioning System (GPS) navigation, real-time weather recording, and spray dispersal modeling (AgDISP) was utilized to accurately treat the experimental blocks by adjusting spray line positions to changing meteorological conditions. Two application rates were applied per formulation that corresponded to 0.75 and 1.00 g AI/ha of deltamethrin and 7.50 and 10.00 g AI/ha of d-Phenothrin. The mosquitoes used for the trials were the main nuisance species found in rice field areas of Thessaloniki, which were primarily Aedes caspius, followed by Culex modestus and Anopheles sacharovi. Overall mean mortality of caged mosquitoes was 69.2% and 64.8% for deltamethrin and d-Phenothrin, respectively. Mean population decrease in wild mosquito populations within the treatment areas was 76.5% and 78% for deltamethrin and d-Phenothrin, respectively. The AgDISP dispersal model, coupled with GPS navigation and real-time weather recording, enabled accurate placement of the spray cloud such that the majority of the treatment area received sufficiently high droplet densities to result in uniform caged-mosquito mortality across all sampling sites.