INSETICIDAL OILS FROM AMAZON PLANTS IN CONTROL OF FALL ARMYWORM

Authors

  • Ana Cláudia Vieira dos Santos Posgraduate Program in Plant Production (Agronomy), Universidade Federal do Acre, Rio Branco, AC
  • Carromberth Carioca Fernandes Center for Biological and Natural Sciences, Universidade Federal do Acre, Rio Branco, AC
  • Lucas Martins Lopes Posgraduate Program in Plant Production (Agronomy), Universidade Federal do Acre, Rio Branco, AC
  • Adalberto Hipólito Sousa Center for Biological and Natural Sciences, Universidade Federal do Acre, Rio Branco, AC

DOI:

https://doi.org/10.1590/1983-21252016v29n314rc

Keywords:

Spodoptera frugiperda. Botanical insecticides. Carapa guianensis. Copaifera sp. Orbignya phalerata.

Abstract

The potential insecticidal of oils from southwestern Amazon plants against Spodoptera frugiperda (J. E. Smith, 1797) (Lepidoptera: Noctuidae) was investigated. Initial bioassays were performed with undiluted oils from 11 plant species. The efficacy of the oils was evaluated against eggs and third-instar caterpillars of S. frugiperda. The oils of Copaifera sp. (Leguminosae), Orbignya phalerata (Arecaceae), and Carapa guianensis (Meliaceae) displayed a high efficacy against the caterpillars and were used in subsequent concentration-response bioassays, at concentrations established through preliminary tests. The highest nonlethal concentrations of oils and the lowest lethal concentrations were calculated. A completely randomized design was adopted in both bioassays. The LC50 of the oils varied from 7.50 to 60.84% (v/v). Copaifera sp. oil had the highest toxicity and was 6.84-fold more toxic than O. phalerata oil and 8.11-fold more toxic than Carapa guianensis oil. In general, oils from Copaifera sp., O. phalerata, and Carapa guianensis were effective in controlling S. frugiperda caterpillars under laboratory conditions, and are good candidates for use in integrated management programs of corn pests.

Author Biography

  • Adalberto Hipólito Sousa, Center for Biological and Natural Sciences, Universidade Federal do Acre, Rio Branco, AC
    É Engenheiro Agrônomo pela Universidade Federal Rural do Semi-Árido (2004). Fez mestrado e doutorado em Entomologia na Universidade Federal de Viçosa, de março de 2005 a abril de 2010. Atualmente, é Professor Adjunto III da Universidade Federal do Acre. Tem experiência na área de Entomologia Agrícola, especificamente com manejo de susceptibilidade de inseticidas candidatos a uso. Nos últimos anos priorizou investigações sobre métodos alternativos de controle,como atmosferas modificadas e inseticidas botânicos, utilizado-se ferramentas ecotoxicológicas, comportamentais e fisiológicas de insetos.

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Published

20-07-2016

Issue

Section

Agronomy