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Marcos Zatti Da ,silva - One of the best experts on this subject based on the ideXlab platform.
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Toxicidade de agroquímicos ao ácaro-da-leprose dos citros Brevipalpus phoenicis (Geijskes) e ao ácaro predador Neoseiulus californicus (McGregor) (Acari: Tenuipalpidae, Phytoseiidae)
Instituto Biológico, 2012Co-Authors: Marcos Zatti Da ,silva, Carlos Amadeu Leite De ,oliveira, Sato M.e, Veronez BAbstract:The objective of this study was to evaluate various pesticides used in citrus crops in regard to their toxicity to Brevipalpus phoenicis and Neoseiulus californicus, a potential predator of phytophagous mites in the crop. Bioassays were conducted using orange-tree leaf discs for N. californicus and fruits for B. phoenicis. A total of 35 adult females of the predator mite were used, along with 50 adult females of the phytophagous mites. Tests were carried out with 13 chemicals at concentrations recommended for the control of leprosis mites. The applications were made using a Potter tower, with 4 replications for each treatment. Assessments of the number of live and dead mites were observed 72 hours after application. Bioassays with spirodiclofen and etoxazole were performed on eggs of mites. Chlorfenapyr and pyridaben proved harmful to N. californicus, causing mortalities of 88 and 99% respectively. Abamectin caused mortality of 62%, considered high when compared to Dinocap (2%), propargite (4.2%), sulfur (5%), fenpropathrin (12.4%) and acrinathrin (22%). Cyflumetofen oxide, fenbutatin and deltamethrin were harmless to N. californicus. Spirodiclofen did not cause egg mortality or larvae mortality in N. californicus, however etoxazole caused 100% mortality in larvae of the predator on contact with the residue of the product. For B. phoenicis, abamectin, chlorfenapyr, Dinocap, cyflumetofen, fenbutatin oxide, pyridaben and propargite caused 100% mortality. Fenpropathrin (95%), acrinathrin (87%) and sulfur (76%) were less effective. Deltamethrin was not effective in controlling leprosis mites. Etoxazole and spirodiclofen caused 100% egg mortality for B. phoenicis.O objetivo deste trabalho foi avaliar a toxicidade dos principais agroquímicos utilizados em citros em Brevipalpus phoenicis e Neoseiulus californicus, potencial predador de ácaros fitófagos na cultura. Os bioensaios foram realizados utilizando discos de folhas de laranjeira para N. californicus e frutos para B. phoenicis. Foram utilizadas 35 fêmeas adultas do ácaro predador e 50 fêmeas adultas do ácaro fitófago. Utilizaram-se 13 agroquímicos nas concentrações recomendadas para o controle do ácaro da leprose. As aplicações foram feitas por meio de torre de Potter, sendo realizadas quatro repetições para cada tratamento. As avaliações do número de ácaros vivos e mortos foram observadas 72 horas após a aplicação. Os bioensaios com espirodiclofeno e etoxazol foram realizados em ovos dos acarinos. Clorfenapir, e piridabem mostraram-se nocivos a N. californicus, causando mortalidades de 88,6 e 99%, respectivamente. Abamectina causou mortalidade de 62,1%, considerada elevada ao se comparar ao Dinocape (2%), propargito (4,2%), enxofre (5%), fempropatrina (12,4%) e acrinatrina (22%). Cyflumetofen, óxido de fembutatina e deltametrina foram inócuos ao N. californicus. Espirodiclofeno não provocou inviabilidade de ovos e mortalidade nas larvas de N. californicus, contudo, etoxazole provocou 100% de mortalidade nas larvas do predador ao entrarem em contato como o resíduo do produto. Para B. phoenicis, abamectina, clorfenapir, Dinocape, cyflumetofen, óxido de fembutatina, piridabem e propargito provocaram 100% de mortalidade. Fempropatrina (95%), acrinatrina (87%) e enxofre (76%) mostraram-se menos efetivos. O deltametrina não foi eficiente no controle do ácaro da leprose. Etoxazol e espirodiclofeno causaram inviabilidade em 100% dos ovos de B. phoenicis.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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Toxicity of agrochemicals to the citrus leprosis mite Brevipalpus phoenicis (Geijskes) and predator mite Neoseiulus Californicus (McGregor) (Acari: Tenuipalpidae, Phytoseiidae)
Instituto Biológico, 2012Co-Authors: Marcos Zatti Da ,silva, Oliveira, Carlos Amadeu Leite De [unesp], Sato M.e, Veronez BAbstract:The objective of this study was to evaluate various pesticides used in citrus crops in regard to their toxicity to Brevipalpus phoenicis and Neoseiulus californicus, a potential predator of phytophagous mites in the crop. Bioassays were conducted using orange-tree leaf discs for N. californicus and fruits for B. phoenicis. A total of 35 adult females of the predator mite were used, along with 50 adult females of the phytophagous mites. Tests were carried out with 13 chemicals at concentrations recommended for the control of leprosis mites. The applications were made using a Potter tower, with 4 replications for each treatment. Assessments of the number of live and dead mites were observed 72 hours after application. Bioassays with spirodiclofen and etoxazole were performed on eggs of mites. Chlorfenapyr and pyridaben proved harmful to N. californicus, causing mortalities of 88 and 99% respectively. Abamectin caused mortality of 62%, considered high when compared to Dinocap (2%), propargite (4.2%), sulfur (5%), fenpropathrin (12.4%) and acrinathrin (22%). Cyflumetofen oxide, fenbutatin and deltamethrin were harmless to N. californicus. Spirodiclofen did not cause egg mortality or larvae mortality in N. californicus, however etoxazole caused 100% mortality in larvae of the predator on contact with the residue of the product. For B. phoenicis, abamectin, chlorfenapyr, Dinocap, cyflumetofen, fenbutatin oxide, pyridaben and propargite caused 100% mortality. Fenpropathrin (95%), acrinathrin (87%) and sulfur (76%) were less effective. Deltamethrin was not effective in controlling leprosis mites. Etoxazole and spirodiclofen caused 100% egg mortality for B. phoenicis.O objetivo deste trabalho foi avaliar a toxicidade dos principais agroquímicos utilizados em citros em Brevipalpus phoenicis e Neoseiulus californicus, potencial predador de ácaros fitófagos na cultura. Os bioensaios foram realizados utilizando discos de folhas de laranjeira para N. californicus e frutos para B. phoenicis. Foram utilizadas 35 fêmeas adultas do ácaro predador e 50 fêmeas adultas do ácaro fitófago. Utilizaram-se 13 agroquímicos nas concentrações recomendadas para o controle do ácaro da leprose. As aplicações foram feitas por meio de torre de Potter, sendo realizadas quatro repetições para cada tratamento. As avaliações do número de ácaros vivos e mortos foram observadas 72 horas após a aplicação. Os bioensaios com espirodiclofeno e etoxazol foram realizados em ovos dos acarinos. Clorfenapir, e piridabem mostraram-se nocivos a N. californicus, causando mortalidades de 88,6 e 99%, respectivamente. Abamectina causou mortalidade de 62,1%, considerada elevada ao se comparar ao Dinocape (2%), propargito (4,2%), enxofre (5%), fempropatrina (12,4%) e acrinatrina (22%). Cyflumetofen, óxido de fembutatina e deltametrina foram inócuos ao N. californicus. Espirodiclofeno não provocou inviabilidade de ovos e mortalidade nas larvas de N. californicus, contudo, etoxazole provocou 100% de mortalidade nas larvas do predador ao entrarem em contato como o resíduo do produto. Para B. phoenicis, abamectina, clorfenapir, Dinocape, cyflumetofen, óxido de fembutatina, piridabem e propargito provocaram 100% de mortalidade. Fempropatrina (95%), acrinatrina (87%) e enxofre (76%) mostraram-se menos efetivos. O deltametrina não foi eficiente no controle do ácaro da leprose. Etoxazol e espirodiclofeno causaram inviabilidade em 100% dos ovos de B. phoenicis
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Toxicidade diferencial de agrotóxicos utilizados em citros para Neoseiulus californicus, Euseius concordis e Brevipalpus phoenicis
Instituto Agronômico de Campinas, 2011Co-Authors: Marcos Zatti Da ,silva, Sato, Mário Eidi, Carlos Amadeu Leite De ,oliveira, Rais, Débora SollerAbstract:Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) é considerada uma das principais pragas em citros no Brasil, devido à transmissão do vírus da leprose dos citros e à necessidade de frequentes aplicações de acaricidas para seu controle. Assim, objetivou-se comparar a toxicidade dos principais agrotóxicos utilizados em citros no Brasil, sobre populações de B. phoenicis e de ácaros predadores das espécies Neoseiuluscalifornicus (McGregor) e Euseius concordis (Chant) (Acari: Phytoseiidae). Foram avaliadas duas populações de E. concordis: uma procedente de Jaboticabal (SP) e outra de Descalvado (SP). Arenas de folhas (para fitoseídeos) ou frutos (para B. phoenicis) de Citrus sinensis Osbeck (L.) cv. Pera, contendo 25 fêmeas adultas de cada espécie foram pulverizadas em torre de Potter. As avaliações de mortalidade foram realizadas 72 horas após a aplicação. Foram utilizadas 4 a 6 concentrações de cada produto (abamectina, acefato, azociclotina, bifentrina, clorfenapir, dicofol, Dinocape, óxido de fembutatina, propargito e piridabem) para a obtenção das curvas de concentração-resposta. Abamectina, azociclotina, clorfenapir, dicofol, Dinocape, óxido de fembutatin, propargito e piridabem foram altamente tóxicos a B. phoenicis, com valores de CL90 iguais ou inferiores aos das concentrações recomendadas desses produtos. N. californicus foi mais tolerante a bifentrina, propargito, óxido de fembutatina e Dinocape que B. phoenicis e E. concordis (ambas as populações). Esses acaricidas tiveram baixa toxicidade aos adultos de N. californicus, para o qual as CL50 foram pelo menos seis vezes maiores que suas concentrações recomendadas. Acefato foi extremamente tóxico a E. concordis, mas inócuo a adultos de N. californicus. A população de E. concordis de Jaboticabal foi mais resistente que a de Descalvado a azociclotina, bifentrina, clorfenapir, dicofol e propargito.Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of São Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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Toxicidade diferencial de agrotóxicos utilizados em citros para Neoseiulus californicus, Euseius concordis e Brevipalpus phoenicis
Bragantia, 2011Co-Authors: Marcos Zatti Da ,silva, Carlos Amadeu Leite De ,oliveira, Mário Eidi Sato, Débora Soller RaisAbstract:Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of Sao Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado.
Carlos Amadeu Leite De ,oliveira - One of the best experts on this subject based on the ideXlab platform.
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Toxicidade de agroquímicos ao ácaro-da-leprose dos citros Brevipalpus phoenicis (Geijskes) e ao ácaro predador Neoseiulus californicus (McGregor) (Acari: Tenuipalpidae, Phytoseiidae)
Instituto Biológico, 2012Co-Authors: Marcos Zatti Da ,silva, Carlos Amadeu Leite De ,oliveira, Sato M.e, Veronez BAbstract:The objective of this study was to evaluate various pesticides used in citrus crops in regard to their toxicity to Brevipalpus phoenicis and Neoseiulus californicus, a potential predator of phytophagous mites in the crop. Bioassays were conducted using orange-tree leaf discs for N. californicus and fruits for B. phoenicis. A total of 35 adult females of the predator mite were used, along with 50 adult females of the phytophagous mites. Tests were carried out with 13 chemicals at concentrations recommended for the control of leprosis mites. The applications were made using a Potter tower, with 4 replications for each treatment. Assessments of the number of live and dead mites were observed 72 hours after application. Bioassays with spirodiclofen and etoxazole were performed on eggs of mites. Chlorfenapyr and pyridaben proved harmful to N. californicus, causing mortalities of 88 and 99% respectively. Abamectin caused mortality of 62%, considered high when compared to Dinocap (2%), propargite (4.2%), sulfur (5%), fenpropathrin (12.4%) and acrinathrin (22%). Cyflumetofen oxide, fenbutatin and deltamethrin were harmless to N. californicus. Spirodiclofen did not cause egg mortality or larvae mortality in N. californicus, however etoxazole caused 100% mortality in larvae of the predator on contact with the residue of the product. For B. phoenicis, abamectin, chlorfenapyr, Dinocap, cyflumetofen, fenbutatin oxide, pyridaben and propargite caused 100% mortality. Fenpropathrin (95%), acrinathrin (87%) and sulfur (76%) were less effective. Deltamethrin was not effective in controlling leprosis mites. Etoxazole and spirodiclofen caused 100% egg mortality for B. phoenicis.O objetivo deste trabalho foi avaliar a toxicidade dos principais agroquímicos utilizados em citros em Brevipalpus phoenicis e Neoseiulus californicus, potencial predador de ácaros fitófagos na cultura. Os bioensaios foram realizados utilizando discos de folhas de laranjeira para N. californicus e frutos para B. phoenicis. Foram utilizadas 35 fêmeas adultas do ácaro predador e 50 fêmeas adultas do ácaro fitófago. Utilizaram-se 13 agroquímicos nas concentrações recomendadas para o controle do ácaro da leprose. As aplicações foram feitas por meio de torre de Potter, sendo realizadas quatro repetições para cada tratamento. As avaliações do número de ácaros vivos e mortos foram observadas 72 horas após a aplicação. Os bioensaios com espirodiclofeno e etoxazol foram realizados em ovos dos acarinos. Clorfenapir, e piridabem mostraram-se nocivos a N. californicus, causando mortalidades de 88,6 e 99%, respectivamente. Abamectina causou mortalidade de 62,1%, considerada elevada ao se comparar ao Dinocape (2%), propargito (4,2%), enxofre (5%), fempropatrina (12,4%) e acrinatrina (22%). Cyflumetofen, óxido de fembutatina e deltametrina foram inócuos ao N. californicus. Espirodiclofeno não provocou inviabilidade de ovos e mortalidade nas larvas de N. californicus, contudo, etoxazole provocou 100% de mortalidade nas larvas do predador ao entrarem em contato como o resíduo do produto. Para B. phoenicis, abamectina, clorfenapir, Dinocape, cyflumetofen, óxido de fembutatina, piridabem e propargito provocaram 100% de mortalidade. Fempropatrina (95%), acrinatrina (87%) e enxofre (76%) mostraram-se menos efetivos. O deltametrina não foi eficiente no controle do ácaro da leprose. Etoxazol e espirodiclofeno causaram inviabilidade em 100% dos ovos de B. phoenicis.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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Toxicidade diferencial de agrotóxicos utilizados em citros para Neoseiulus californicus, Euseius concordis e Brevipalpus phoenicis
Instituto Agronômico de Campinas, 2011Co-Authors: Marcos Zatti Da ,silva, Sato, Mário Eidi, Carlos Amadeu Leite De ,oliveira, Rais, Débora SollerAbstract:Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) é considerada uma das principais pragas em citros no Brasil, devido à transmissão do vírus da leprose dos citros e à necessidade de frequentes aplicações de acaricidas para seu controle. Assim, objetivou-se comparar a toxicidade dos principais agrotóxicos utilizados em citros no Brasil, sobre populações de B. phoenicis e de ácaros predadores das espécies Neoseiuluscalifornicus (McGregor) e Euseius concordis (Chant) (Acari: Phytoseiidae). Foram avaliadas duas populações de E. concordis: uma procedente de Jaboticabal (SP) e outra de Descalvado (SP). Arenas de folhas (para fitoseídeos) ou frutos (para B. phoenicis) de Citrus sinensis Osbeck (L.) cv. Pera, contendo 25 fêmeas adultas de cada espécie foram pulverizadas em torre de Potter. As avaliações de mortalidade foram realizadas 72 horas após a aplicação. Foram utilizadas 4 a 6 concentrações de cada produto (abamectina, acefato, azociclotina, bifentrina, clorfenapir, dicofol, Dinocape, óxido de fembutatina, propargito e piridabem) para a obtenção das curvas de concentração-resposta. Abamectina, azociclotina, clorfenapir, dicofol, Dinocape, óxido de fembutatin, propargito e piridabem foram altamente tóxicos a B. phoenicis, com valores de CL90 iguais ou inferiores aos das concentrações recomendadas desses produtos. N. californicus foi mais tolerante a bifentrina, propargito, óxido de fembutatina e Dinocape que B. phoenicis e E. concordis (ambas as populações). Esses acaricidas tiveram baixa toxicidade aos adultos de N. californicus, para o qual as CL50 foram pelo menos seis vezes maiores que suas concentrações recomendadas. Acefato foi extremamente tóxico a E. concordis, mas inócuo a adultos de N. californicus. A população de E. concordis de Jaboticabal foi mais resistente que a de Descalvado a azociclotina, bifentrina, clorfenapir, dicofol e propargito.Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of São Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
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Toxicidade diferencial de agrotóxicos utilizados em citros para Neoseiulus californicus, Euseius concordis e Brevipalpus phoenicis
Bragantia, 2011Co-Authors: Marcos Zatti Da ,silva, Carlos Amadeu Leite De ,oliveira, Mário Eidi Sato, Débora Soller RaisAbstract:Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of Sao Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado.
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AVALIAÇÃO DA EFICIÊNCIA DE ACARICIDAS, POR AÇÃO DIRETA E RESIDUAL, SOBRE Tetranychus mexicanus (McGREGOR, 1950) (ACARI: TETRANYCHIDAE) EM CITROS
2008Co-Authors: Daniel Junior De Andrade, Carlos Amadeu Leite De ,oliveira, Fernando César PattaroAbstract:The use of traditional pesticides is practically the only efficient tactics of control of the spider mite in the citrus crop. The objective of this work was to evaluate the efficiency of miticides on Tetranychus mexicanus, in different dosages for direct and residual action for assist in the strategies of handling of the resistance. The treatments have been composed for the following products, expressed in mL or g of the product in 100 1 of water: cyhexatin in 50 mL oxide of fenbutatin in 80 mL, hexythiazox in 3g, Dinocap in 200 mL, propargite in 100 mL, pyridaben in 50 mL, abamectin in 50 mL in pre-mixture with 250 mL of vegetable oil, sulfur in 400g, sulphurated inorganic in 5,000 ml and control. Based on the results was concluded that the products Dinocap, propargite, pyridaben, abamectin + vegetable oil and sulphurated inorganic were most efficient ones in the control of T. mexicanus. Sulfur and cyhexatin presented mean efficency in the control of T. mexicanus. Oxide of fenbutatin and hexythiazox did not present satisfactory efficiency to control T. mexicanus.
Gabriel Epure - One of the best experts on this subject based on the ideXlab platform.
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monitoring the breakdown of Dinocap in spiked soil wine and grape samples by gc ms and ftir atr
Environmental Engineering and Management Journal, 2018Co-Authors: Catalina Calin, Nicoleta Grigoriu, Gina Vasile Scaeteanu, Roxana Maria Madjar, Rodica Mihaela Lungu, Gabriel EpureAbstract:Capillary gas chromatography coupled with mass spectrometry technique was used for the assessment of low concentration of dinitrophenol pesticide, Dinocap in different spiked samples. For this purpose it has been spiked with Dinocap (15- 200 g/mL) five environmental matrices (a soil sample and two each samples of wine and grapes). The Dinocap degradation grade in these samples was also monitored. The extraction was performed in dichloromethane. The assessment of the Dinocap in the samples were also achieved by FTIR/ATR and reveals that after 18 days of pesticide application the recovery level of Dinocap decreased from 64% to 3% in grape, from 72% to 9% in soil, from 82% to 10% in wine at 18 days after pesticide application. The method described in this paper could be used for screening and identification of the named pesticide in other environmental samples with a spiking level as low as 2-20 g/mL.
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MONITORING THE BREAKDOWN OF Dinocap IN SPIKED SOIL, WINE AND GRAPE SAMPLES BY GC/MS AND FTIR/ATR
Environmental Engineering and Management Journal, 2018Co-Authors: Catalina Calin, Nicoleta Grigoriu, Gina Vasile Scaeteanu, Roxana Maria Madjar, Rodica Mihaela Lungu, Gabriel EpureAbstract:Capillary gas chromatography coupled with mass spectrometry technique was used for the assessment of low concentration of dinitrophenol pesticide, Dinocap in different spiked samples. For this purpose it has been spiked with Dinocap (15- 200 g/mL) five environmental matrices (a soil sample and two each samples of wine and grapes). The Dinocap degradation grade in these samples was also monitored. The extraction was performed in dichloromethane. The assessment of the Dinocap in the samples were also achieved by FTIR/ATR and reveals that after 18 days of pesticide application the recovery level of Dinocap decreased from 64% to 3% in grape, from 72% to 9% in soil, from 82% to 10% in wine at 18 days after pesticide application. The method described in this paper could be used for screening and identification of the named pesticide in other environmental samples with a spiking level as low as 2-20 g/mL.
Rais, Débora Soller - One of the best experts on this subject based on the ideXlab platform.
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Differential toxicity of pesticides used on citrus to Neoseiulus californicus, Euseius concordis and Brevipalpus phoenicis
Instituto Agronômico de Campinas, 2011Co-Authors: Silva, Marcos Zatti Da [unesp], Sato, Mário Eidi, Oliveira, Carlos Amadeu Leite De [unesp], Rais, Débora SollerAbstract:Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) é considerada uma das principais pragas em citros no Brasil, devido à transmissão do vírus da leprose dos citros e à necessidade de frequentes aplicações de acaricidas para seu controle. Assim, objetivou-se comparar a toxicidade dos principais agrotóxicos utilizados em citros no Brasil, sobre populações de B. phoenicis e de ácaros predadores das espécies Neoseiuluscalifornicus (McGregor) e Euseius concordis (Chant) (Acari: Phytoseiidae). Foram avaliadas duas populações de E. concordis: uma procedente de Jaboticabal (SP) e outra de Descalvado (SP). Arenas de folhas (para fitoseídeos) ou frutos (para B. phoenicis) de Citrus sinensis Osbeck (L.) cv. Pera, contendo 25 fêmeas adultas de cada espécie foram pulverizadas em torre de Potter. As avaliações de mortalidade foram realizadas 72 horas após a aplicação. Foram utilizadas 4 a 6 concentrações de cada produto (abamectina, acefato, azociclotina, bifentrina, clorfenapir, dicofol, Dinocape, óxido de fembutatina, propargito e piridabem) para a obtenção das curvas de concentração-resposta. Abamectina, azociclotina, clorfenapir, dicofol, Dinocape, óxido de fembutatin, propargito e piridabem foram altamente tóxicos a B. phoenicis, com valores de CL90 iguais ou inferiores aos das concentrações recomendadas desses produtos. N. californicus foi mais tolerante a bifentrina, propargito, óxido de fembutatina e Dinocape que B. phoenicis e E. concordis (ambas as populações). Esses acaricidas tiveram baixa toxicidade aos adultos de N. californicus, para o qual as CL50 foram pelo menos seis vezes maiores que suas concentrações recomendadas. Acefato foi extremamente tóxico a E. concordis, mas inócuo a adultos de N. californicus. A população de E. concordis de Jaboticabal foi mais resistente que a de Descalvado a azociclotina, bifentrina, clorfenapir, dicofol e propargito.Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of São Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado
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Toxicidade diferencial de agrotóxicos utilizados em citros para Neoseiulus californicus, Euseius concordis e Brevipalpus phoenicis
Instituto Agronômico de Campinas, 2011Co-Authors: Marcos Zatti Da ,silva, Sato, Mário Eidi, Carlos Amadeu Leite De ,oliveira, Rais, Débora SollerAbstract:Brevipalpus phoenicis (Geijskes) (Acari: Tenuipalpidae) é considerada uma das principais pragas em citros no Brasil, devido à transmissão do vírus da leprose dos citros e à necessidade de frequentes aplicações de acaricidas para seu controle. Assim, objetivou-se comparar a toxicidade dos principais agrotóxicos utilizados em citros no Brasil, sobre populações de B. phoenicis e de ácaros predadores das espécies Neoseiuluscalifornicus (McGregor) e Euseius concordis (Chant) (Acari: Phytoseiidae). Foram avaliadas duas populações de E. concordis: uma procedente de Jaboticabal (SP) e outra de Descalvado (SP). Arenas de folhas (para fitoseídeos) ou frutos (para B. phoenicis) de Citrus sinensis Osbeck (L.) cv. Pera, contendo 25 fêmeas adultas de cada espécie foram pulverizadas em torre de Potter. As avaliações de mortalidade foram realizadas 72 horas após a aplicação. Foram utilizadas 4 a 6 concentrações de cada produto (abamectina, acefato, azociclotina, bifentrina, clorfenapir, dicofol, Dinocape, óxido de fembutatina, propargito e piridabem) para a obtenção das curvas de concentração-resposta. Abamectina, azociclotina, clorfenapir, dicofol, Dinocape, óxido de fembutatin, propargito e piridabem foram altamente tóxicos a B. phoenicis, com valores de CL90 iguais ou inferiores aos das concentrações recomendadas desses produtos. N. californicus foi mais tolerante a bifentrina, propargito, óxido de fembutatina e Dinocape que B. phoenicis e E. concordis (ambas as populações). Esses acaricidas tiveram baixa toxicidade aos adultos de N. californicus, para o qual as CL50 foram pelo menos seis vezes maiores que suas concentrações recomendadas. Acefato foi extremamente tóxico a E. concordis, mas inócuo a adultos de N. californicus. A população de E. concordis de Jaboticabal foi mais resistente que a de Descalvado a azociclotina, bifentrina, clorfenapir, dicofol e propargito.Brevipalpus phoenicis (Geijskes) is considered one of the most important pests on citrus in Brazil, due to the transmission of Citrus leprosis virus and the necessity of frequent acaricide applications for its control. This study was carried out to compare the toxicity of the main pesticides used on citrus in Brazil to the populations of B. phoenicis and the predaceous mites Neoseiuluscalifornicus (McGregor), Euseius concordis (Chant). Two populations of E. concordis were evaluated: one from Jaboticabal County and other from Descalvado County, State of São Paulo. Arenas of leaves (for phytoseiids) and fruits (for B. phoenicis) of Citrus sinensis (L.) Osbeck cv. Pera with 25 adult females of each species were sprayed under Potter spray tower. The mortality was assessed 72 hours after treatment. Four to six concentrations of each chemical (abamectin, acephate, azocyclotin, bifenthrin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben) were used to obtain the concentration-mortality curves. Abamectin, azocyclotin, chlorfenapyr, dicofol, Dinocap, fenbutatin oxide, propargite and pyridaben were highly toxic to B. phoenicis, presenting LC90 values equal or lower than the recommended concentrations of the chemicals. N. californicus was more tolerant to bifenthin, propargite, fenbutatin oxide and Dinocap than B. phoenicis and E. concordis (both populations). These pesticides presented low toxicity to the adults of N. californicus, for which the LC50 of chemicals were at least six times higher than their recommended concentrations. Acephate was extremely toxic to E. concordis from Descalvado and Jaboticabal, but innocuous to adults of N. californicus. The population of E. concordis from Jaboticabal was more resistant to azocyclotin, bifenthrin, chlorfenapyr, dicofol and propargite than that from Descalvado.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES
Catalina Calin - One of the best experts on this subject based on the ideXlab platform.
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monitoring the breakdown of Dinocap in spiked soil wine and grape samples by gc ms and ftir atr
Environmental Engineering and Management Journal, 2018Co-Authors: Catalina Calin, Nicoleta Grigoriu, Gina Vasile Scaeteanu, Roxana Maria Madjar, Rodica Mihaela Lungu, Gabriel EpureAbstract:Capillary gas chromatography coupled with mass spectrometry technique was used for the assessment of low concentration of dinitrophenol pesticide, Dinocap in different spiked samples. For this purpose it has been spiked with Dinocap (15- 200 g/mL) five environmental matrices (a soil sample and two each samples of wine and grapes). The Dinocap degradation grade in these samples was also monitored. The extraction was performed in dichloromethane. The assessment of the Dinocap in the samples were also achieved by FTIR/ATR and reveals that after 18 days of pesticide application the recovery level of Dinocap decreased from 64% to 3% in grape, from 72% to 9% in soil, from 82% to 10% in wine at 18 days after pesticide application. The method described in this paper could be used for screening and identification of the named pesticide in other environmental samples with a spiking level as low as 2-20 g/mL.
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MONITORING THE BREAKDOWN OF Dinocap IN SPIKED SOIL, WINE AND GRAPE SAMPLES BY GC/MS AND FTIR/ATR
Environmental Engineering and Management Journal, 2018Co-Authors: Catalina Calin, Nicoleta Grigoriu, Gina Vasile Scaeteanu, Roxana Maria Madjar, Rodica Mihaela Lungu, Gabriel EpureAbstract:Capillary gas chromatography coupled with mass spectrometry technique was used for the assessment of low concentration of dinitrophenol pesticide, Dinocap in different spiked samples. For this purpose it has been spiked with Dinocap (15- 200 g/mL) five environmental matrices (a soil sample and two each samples of wine and grapes). The Dinocap degradation grade in these samples was also monitored. The extraction was performed in dichloromethane. The assessment of the Dinocap in the samples were also achieved by FTIR/ATR and reveals that after 18 days of pesticide application the recovery level of Dinocap decreased from 64% to 3% in grape, from 72% to 9% in soil, from 82% to 10% in wine at 18 days after pesticide application. The method described in this paper could be used for screening and identification of the named pesticide in other environmental samples with a spiking level as low as 2-20 g/mL.