Potentiation of Copaíba Oil-Resin With Synthetic Insecticides to Control of Fall Armyworm

Abstract

-The control of Spodoptera frugiperda (J. E. SMITH) (Lepidoptera: Noctuidae) has been carried out mainly with pyrethroids and organophosphates insecticides. The continuous and indiscriminate use of synthetic insecticides, for decades, has led to the selection of resistant populations and has caused concerns for human health and the environment. An alternative is the use of botanical insecticides, including through the mixtures with synthetic insecticides. This study aimed to investigate the toxicity of copaiba oil-resin mixtures (COR) with deltamethrin, beta-cyfluthrin, beta-cypermethrin, methomyl, triazophos and chlorpyrifos for S. frugiperda. Bioassays were performed in the laboratory using newly hatched caterpillars on a contaminated surface (filter paper). Initially, concentration-mortality curves were established for each insecticide and COR. Based on the results, experiments were conducted to verify the effect of the COR mixtures with synthetic insecticides in the proportions of 1:1 (LC 25 + LC 25 ) on larvae of S. frugiperda. Additionally, COR concentration-response curves were established by adding 1/8 of the recommended rate of each insecticide. Notably, the use of this concentration for all insecticides was previously determined in bioassays, and no significant toxicity was found for S. frugiperda caterpillars. It was found that the toxicity of COR increased substantially by adding synthetic insecticides, especially with lower mixtures with beta-cypermethrin, methomyl and triazophos.Keywords: Bioinsecticide. Additive effect. Synergism. Corn plague. Integrated pest management. POTENCIALIZAÇÃO DO ÓLEO-RESINA DE COPAÍBA COM INSETICIDAS SINTÉTICOS PARAO CONTROLE DA LAGARTA-DO-CARTUCHO RESUMO -O controle de Spodoptera frugiperda (J. E. SMITH) (Lepidoptera: Noctuidae) tem sido realizado principalmente com inseticidas piretróides e organofosforados. O uso contínuo e indiscriminados de inseticidas sintéticos, durante décadas, tem ocasionado a seleção de populações resistentes, bem como preocupações em relação à saúde humana e ao meio ambiente. Uma alternativa é o emprego de inseticidas botânicos, inclusive por meio de misturas com inseticidas sintéticos. Assim, este trabalho teve por objetivo investigar a toxicidade de misturas do óleo-resina de copaíba (ORC) com os inseticidas deltametrina, beta-ciflutrina, beta-cipermetrina, metomil, triazofós e clorpirifós para S. frugiperda. Foram realizados bioensaios em laboratório utilizando-se lagartas recém-eclodidas em superfície contaminada (papel filtro). Inicialmente, foram estabelecidas curvas de concentração-mortalidade para cada inseticida e para o COR. A partir dos resultados obtidos foram realizados bioensaios para verificar o efeito das misturas do ORC com os inseticidas sintéticos nas proporções de 1:1 (CL 25 + CL 25 ) sobre lagartas de S. frugiperda. Adicionalmente, foram estabelecidas curvas de concentração-resposta do ORC adicionando-se 1/8 da dose comercial de cada inseticida. Vale destacar que o uso desta fração para todos os inseticidas foi d...

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“…Aiming to provide options for the management of S. frugiperda resistance to chemical insecticides, FAzOliN et al (2015bFAzOliN et al ( , 2016bFAzOliN et al ( , 2016cFAzOliN et al ( , 2017a evaluated the combination of the essential oil of P. aduncum with 15 conventional chemical active ingredients. AlmeidA et al (2017) analyzed the efficiency of six active ingredients mixed with copaiba oil-resin. SANtOS et al ( , 2016bSANtOS et al ( , 2016c observed the insecticidal potential of pure oils from 11 plant species in the control of the caterpillar, indicating the efficiency of Copaiba (Copaifera sp., Fabaceae), Babassu (Orbignya phalerata Mart., Arecaceae) and Crapwood (Carapa guianensis Aubl., Meliaceae).…”

Agricultural entomology in the state of Acre: a historical overview and future challenges

“…Aiming to provide options for the management of S. frugiperda resistance to chemical insecticides, FAzOliN et al (2015bFAzOliN et al ( , 2016bFAzOliN et al ( , 2016cFAzOliN et al ( , 2017a evaluated the combination of the essential oil of P. aduncum with 15 conventional chemical active ingredients. AlmeidA et al (2017) analyzed the efficiency of six active ingredients mixed with copaiba oil-resin. SANtOS et al ( , 2016bSANtOS et al ( , 2016c observed the insecticidal potential of pure oils from 11 plant species in the control of the caterpillar, indicating the efficiency of Copaiba (Copaifera sp., Fabaceae), Babassu (Orbignya phalerata Mart., Arecaceae) and Crapwood (Carapa guianensis Aubl., Meliaceae).…”

Biological performance of Leptoglossus zonatus (Dallas) (Hemiptera: Coreidae) on corn genotypes

“…This situation stimulates the use of agrochemicals that are not efficient and encourages its application in higher doses than necessary to control the insect (Foresti et al 2017). Moreover, the continuous and indiscriminate use of synthetic insecticides has caused the elimination of beneficial insects, selection of resistant populations, as well as concerns regarding human health and the environment (Almeida et al 2017). Thereby, it is necessary searching for new control effective strategies and environmental safer.…”