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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Toxicity of an Annonin-Based Commercial Bioinsecticide Against Three Primary Pest Species of Stored Products

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Author(s):
Ribeiro, L. P. [1] ; Zanardi, O. Z. [2] ; Goncalves, G. L. P. [2] ; Ansante, T. F. [2] ; Yamamoto, P. T. [2] ; Vendramim, J. D. [2]
Total Authors: 6
Affiliation:
[1] EPAGRI CEPAF, Av Servidao Ferdinando Tusset S-N, BR-89801970 Chapeco, SC - Brazil
[2] Univ Sao Paulo ESALQ USP, Luiz de Queiroz Coll Agr, Dept Entomol & Acarol, Piracicaba, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Neotropical Entomology; v. 47, n. 1, p. 145-151, FEB 2018.
Web of Science Citations: 0
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 mu L kg(-1)), S. zeamais (LC50 = 2781 mu L kg(-1)), and Z. subfasciatus (LC50 = 2120 mu L 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 mu L kg(-1)) and Z. subfasciatus (EC50 = 552.7 mu L kg(-1)). Moreover, the bioinsecticide significantly reduced the number of emerged insects (F-1 generation) of C. maculatus (EC50 = 2763.0 mu L kg(-1)), S. zeamais (EC50 = 1380.8 mu L kg(-1)), and Z. subfasciatus (EC50 = 561.5 mu L 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 (InsectoA (R) 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. (AU)