Efeito de óleo de nim (Azadirachta indica) sobre Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) e Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae)
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Data
2012-03-08
Autores
Campos, Aniele Pianoscki de [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
Este trabalho teve como objetivo selecionar doses de óleo de nim com efeito na mortalidade de lagartas de Spodoptera frugiperda, além de estudar os efeitos diretos sobre Podisus nigrispinus quando aplicados via tópica ou oferecidos via ingestão no desenvolvimento e mortalidade desse predador e estudar os efeitos indiretos, após sua ingestão por lagartas de S. frugiperda, no desenvolvimento e na capacidade predatória de P. nigrispinus. Lagartas de terceiro instar foram individualizadas, com uma porção de folha de milho da variedade AL 34. Estas foram emergidas no óleo de nim nas concentrações de 0,010%; 0,017%; 0,077%; 0,129%; 0,359%; 0,599%; 1,000%; testemunha e deltametrina 25 CE (0,100%) por 3 minutos, secas e oferecidas às lagartas. As avaliações foram realizadas diariamente, verificando-se a mortalidade larval e pupal e os períodos (dias) larval e pupal, além de estimar a concentração letal (CL50). Avaliando os efeitos do óleo de nim sobre ninfas e adultos de P. nigrispinus quando aplicados via tópica e oferecidos via ingestão, constaram de duas etapas, uma referente ao comportamento do inseto e outra ao desempenho biológico. Os tratamentos, tanto para este ensaio como para o ensaio de biologia e capacidade predatória, foram soluções aquosas de óleo de nim nas concentrações de 0,077%, 0,359% e 0,599%, inseticida deltametrina 25 CE (0,100%) e testemunha. A aplicação tópica foi feita com 0,5 l (para ninfas) e 1 l (para adultos) das soluções no dorso dos insetos e via ingestão oferecidas por tubo anestésico. As avaliações foram realizadas observando o comportamento dos insetos nos primeiros 10 minutos e de 60 a 70 minutos após a aplicação, anotando o tempo que o inseto permaneceu parado e/ou movimentando ou se alimentando. Os insetos foram alimentados diariamente com...
This work aimed to select doses of the natural product with neem effect on mortality of larvae of Spodoptera frugiperda, in addition to studying the direct effects of neem oil on Podisus nigrispinus when applied topically or given via ingestion in the development and mortality of this predator and study the indirect effects of neem oil, after ingestion by larvae of S. frugiperda, development and predatory capacity of P. nigrispinus. Third instar larvae were individualized, with a handful of leaf corn of variety AL 34. These leaves were emerged in neem oil at concentrations of 0.010%; 0.017%; 0.077%; 0.129%; 0.359%; 0.599%; 1.000%; witness and deltamethrin 25 CE (0.100%) for 3 minutes, dried and offered to caterpillars . The evaluations were performed daily by checking the mortality and larval and pupal periods (days) larval and pupal, and determination of lethal concentration (CL50). Assessing the effects of neem oil on nymphs and adults of P. nigrispinus when applied topically and offered via ingestion, consisted of two steps, one for the behavior of the insect and other biological parameters. The treatments, both for this test as the test for biology were aqueous solutions of neem oil in concentrations of 0.077%; 0.359% and 0.599%; deltamethrin 25 CE (0.100%) and control. Topical application was done with 0.5 l (for nymphs) and 1 l (for adults) on the back of the solutions via ingestion of insects and offered anesthetic tube. Evaluations were performed by observing the behavior of insects in the first 10 minutes and 60 to 70 minutes after application, noting the time that the insect remained standing and/or moving or feeding. The insects were fed daily with larvae of Tenebrio molitor. Were also evaluated for the nymphs, mortality (%), duration (days) of the fifth instar and consumption until they become adults. For adults... (Complete abstract click electronic access below)
This work aimed to select doses of the natural product with neem effect on mortality of larvae of Spodoptera frugiperda, in addition to studying the direct effects of neem oil on Podisus nigrispinus when applied topically or given via ingestion in the development and mortality of this predator and study the indirect effects of neem oil, after ingestion by larvae of S. frugiperda, development and predatory capacity of P. nigrispinus. Third instar larvae were individualized, with a handful of leaf corn of variety AL 34. These leaves were emerged in neem oil at concentrations of 0.010%; 0.017%; 0.077%; 0.129%; 0.359%; 0.599%; 1.000%; witness and deltamethrin 25 CE (0.100%) for 3 minutes, dried and offered to caterpillars . The evaluations were performed daily by checking the mortality and larval and pupal periods (days) larval and pupal, and determination of lethal concentration (CL50). Assessing the effects of neem oil on nymphs and adults of P. nigrispinus when applied topically and offered via ingestion, consisted of two steps, one for the behavior of the insect and other biological parameters. The treatments, both for this test as the test for biology were aqueous solutions of neem oil in concentrations of 0.077%; 0.359% and 0.599%; deltamethrin 25 CE (0.100%) and control. Topical application was done with 0.5 l (for nymphs) and 1 l (for adults) on the back of the solutions via ingestion of insects and offered anesthetic tube. Evaluations were performed by observing the behavior of insects in the first 10 minutes and 60 to 70 minutes after application, noting the time that the insect remained standing and/or moving or feeding. The insects were fed daily with larvae of Tenebrio molitor. Were also evaluated for the nymphs, mortality (%), duration (days) of the fifth instar and consumption until they become adults. For adults... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Lagarta - Inseticida natural, Percevejo (Inseto) - Controle biológico, Milho - Pragas agrícolas - Controle biológico, Pragas - Controle integrado, Predação (Biologia), Inseticidas biológicos, Bug predator, Natural insecticide, Biological control
Como citar
CAMPOS, Aniele Pianoscki de. Efeito de óleo de nim (Azadirachta indica) sobre Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) e Podisus nigrispinus (Dallas, 1851) (Hemiptera: Pentatomidae). 2012. iv, 72 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Ciências Agrárias e Veterinárias, 2012.