Synergistic potential of dillapiole-rich essential oil with synthetic pyrethroid insecticides against fall armyworm

Ciência Rural

Murilo Fazolin¹  Joelma Lima Vidal Estrela¹  André Fábio Monteiro Medeiros¹  Iriana Maria Da Silva¹  Luiara Paiva Gomes¹  Maria Samylla De Farias Silva¹ 

关键词: alpha-cypermethrin;    beta-cypermethrin;    fenpropathrin;    gamma-cyhalothrin;    insecticide resistance;    alfa-Cipermetrina;    beta-Cipermetrina;    fenpropatrina;    gama-Cialotrina;    resistência a inseticidas;   

DOI  :  10.1590/0103-8478cr20141500

来源: SciELO

【 摘 要 】

ABSTRACT: The objective of this study was to evaluate the synergy and response homogeneity of the Spodoptera frugiperda larvae population to the Piper aduncum essential oil in combination with pyrethroid insecticides (alpha-cypermethrin, beta-cypermethrin, fenpropathrin, and gamma-cyhalothrin) compared to piperonylbutoxide (PBO) as positive control. Synergism (SF) comparisons were obtained using lethal concentration (LC50) and lethal dose (LD50) ratios of insecticides individually and in their respective synergistic combinations with essential oil and PBO. Dose/concentration-mortality slope curves were used to establish relative toxicity increase promoted by synergism. They also determined homogeneity response. Residual contact revealed significant potentiation for commercial insecticides formulated with beta-cypermethrin (SF=9.05-0.5) and fenpropathrin (SF=34.05-49.77) when combined with the P. aduncum essential oil. For topical contact, significant potentiation occurred only for alpha-cypermethrin (SF=7.55-3.68), fenpropathrin (SF=3.37-1.21), and gamma-cyhalothrin (SF=5.79-10.48) insecticides when combined with essential oil. With the exception of fenpropathrin and gamma-cyhalothrin, insecticides synergistic combinations presented homogeneous response by topical as well as residual contact at least with essential oil. The SF significance values ​​of the P. aduncum essential oil combined with alpha-cypermethrin, beta-cypermethrin, fenpropathrin, and gamma-cyhalothrin insecticides indicated potential for this oil to be used as an alternative to PBO.

【 授权许可】

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