Difference between revisions of "Neotropical Entomology (2018) 47, 145-151"

Revision as of 20:53, 11 May 2019

L.P. Ribeiro, O.Z. Zanardi, G.L.P. Gonçalves, T.F. Ansante, P.T. Yamamoto and J.D. Vendramim (2018)
Toxicity of an annonin-based commercial bioinsecticide against three primary pest species of stored products
Neotropical Entomology 47 (1), 145-151
Abstract: 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.
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Link to article at publishers website
Database assignments for author(s): Odimar Zanuzo Zanardi

Research topic(s) for pests/diseases/weeds:
control - general

Pest and/or beneficial records: