Toxicity of an annonin-based commercial bioinsecticide against three primary pest species of stored products
| Autor: | Odimar Zanuzo Zanardi, Thiago Felipe Ansante, Pedro Takao Yamamoto, Leandro do Prado Ribeiro, Gabriel Luiz Padoan Gonçalves, José Djair Vendramim |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Male Insecticides Acetogenins 01 natural sciences Zea mays Annona Toxicology Botany Animals biology Annonin Weevil Sitophilus Vigna Fabaceae Bean weevil Annona squamosa biology.organism_classification Callosobruchus maculatus 010602 entomology Maize weevil Biological Control Agents Food Storage Insect Science Weevils Female PEST analysis Brazil 010606 plant biology & botany PLANTAS PRODUTORAS DE PESTICIDA |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | The effects of a bioinsecticide formulation based on extract of Annona squamosa L. (Annonaceae) containing 10,000 mg L−1 of acetogenin annonin as the main active ingredient were investigated against three primary pest species of stored grains in Brazil [maize weevil Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae), Mexican bean weevil Zabrotes subfasciatus (Boheman) (Coleoptera: Chrysomelidae: Bruchinae), and cowpea weevil Callosobruchus maculatus (Fabricius) (Coleoptera: Chrysomelidae: Bruchinae)] by means of residual contact bioassays. In a concentration-dependent manner, the annonin-based commercial bioinsecticide caused significant adult mortality of C. maculatus (LC50 = 6890 μL kg−1), S. zeamais (LC50 = 2781 μL kg−1), and Z. subfasciatus (LC50 = 2120 μL kg−1) after 120 h of residual contact exposure. In addition to acute toxicity, the tested bioinsecticide also promoted a significant reduction of the number of eggs laid by females of C. maculatus (EC50 = 5949.7 μL kg−1) and Z. subfasciatus (EC50 = 552.7 μL kg−1). Moreover, the bioinsecticide significantly reduced the number of emerged insects (F1 generation) of C. maculatus (EC50 = 2763.0 μL kg−1), S. zeamais (EC50 = 1380.8 μL kg−1), and Z. subfasciatus (EC50 = 561.5 μL kg−1). The bioinsecticide also reduced the percentage of damaged grains for the three pest species studied, and its grain-protectant properties are comparable to or superior in efficacy in relation to a diatomaceous earth-based insecticide (Insecto® at 1000 mg kg−1) used as a positive control. Thus, this standardized formulation has promising bioactivity against stored insect species and can be a useful component for IPM of stored grains in Brazil and elsewhere. |
| Databáze: | OpenAIRE |
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