Atividade inseticida de componentes de óleos essenciais sobre Sitophilus zeamais Mots. 1855 (Coleoptera: Curculionidae) e Lasioderma serricorne (Fabricius, 1792) (Coleoptera: Anobiidae)
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Data
2021-02-26
Autores
Ataíde, Julielson Oliveira
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Universidade Federal do Espírito Santo
Resumo
In grain storage, there are problems caused by insect pests, which can cause quantitative and qualitative losses during the storage of seeds and grains. Among the pests, the species, Sitophilus zeamais Mots. 1855 (Coleoptera: Curculionidae) and Lasioderma serricorne (Fabricius, 1792) (Coleoptera: Anobiidae). The control of these stored grain pests is carried out by chemical insecticide. However, there are few products registered to control these stored grain pests. Thus, the search for control alternatives, such as the use of compounds extracted from plants with insecticidal properties, represents a promising alternative. Essential oils and their major components have played a significant role in the development of insecticides. Thus, the objective of this work was to evaluate acute toxicity, effect on survival and emergency and the response of the path of some major components of essential oils, thymol, camphor, terpineol, camphene, eucalyptol, limonene, β-pinene and eugenol and their mixtures about S. zeamais and L. serricorne. The adults of S. zeamais and L. serricorne were subjected to fumigation testing, effect on adult emergence and survival and walking response. The results show that the major components and mixtures caused acute toxicity, reduced the survival time and production of adults and altered the behavioral activity of S. zeamais and L. serricorne. The camphor + camphene mixture showed a synergistic effect, with CL50 and CL90 of 2.77 and 20.34 µl/mL respectively on S. zeamais. The major components eucalyptol and terpineol showed 65% mortality, in which the mixtures terpineol + eucalyptol and camphor + thymol presented 47% and 52% over adults of L. serricorne. The results showed that the major components and mixtures are promising for the development of new insecticides.
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Pragas de grãos armazenados , besouro do cigarro , toxidade , gorgulho