Baseline Toxicity Data of Different Insecticides against the Fall Armyworm Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) and Control Failure Likelihood Estimation in Burkina Faso
نویسندگان
چکیده
The fall armyworm (Spodoptera frugiperda) is a worldwide maize pest originating from the American continent. It invaded Africa during 2016, causing important economic damages, forcing African countries to take urgent actions tackle this new invasive pest. In Burkina Faso, several chemical insecticides were promoted, but farmers have quickly and repeatedly reported control failures. work, we collected seven populations in as many maize-producing areas of Faso. Following approved IRAC leaf bioassay protocol, evaluated susceptibility third instar larvae commercially available insecticide formulations, including various modes action: methomyl chlorpyriphos-ethyl (acetylcholinesterase inhibitors), deltamethrin lambda-cyhalothrin (sodium channel modulators), emamectin benzoate abamectin (chloride activators) Bacillus thuringiensis (a microbial disruptor insect midgut membranes). Lethal concentrations (LC50), resistance ratios (RR50) relative toxicity calculated for each population active ingredient. LC50 values all S. frugiperda were, order importance: (0.33–0.38 µg/l), (18–73 mg/l), (58–430 chlorpyrifos-ethyl (199–377 (70–541 mg/l) (268–895 mg/l). B. formulation ranged 430 614 MIU/l. Lambda-cyhalothrin was least efficient tested pesticides, most (relative ×2 712 969). Methomyl (×49), (×15), (×13), (×4) also more toxic than lambda-cyhalothrin. Based on these results, conclude that benzoate, are We discuss importance implement national-level survey major pest, which would allow rapid adaptation strategy.
منابع مشابه
Induced Resistance Studied in Maize with the Fall Armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae) and the Chemical Inducer Actigard
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ژورنال
عنوان ژورنال: African Entomology
سال: 2021
ISSN: ['1021-3589', '2224-8854']
DOI: https://doi.org/10.4001/003.029.0435