Efficiency of Essential Oils and Gamma adiation against Lesser Grain Borer, Rhyzopertha Dominica Fabricius. (Coleoptera:Bostrochidae

Document Type : Research and Review Papers

Authors

1 Plant Protection Department Faculty of Agriculture Sohag University Sohag 82524 Egypt

2 Plant Protection Department

3 Faculty of Agriculture Sohag University Protection Plants department .

Abstract

Stored grain pests can be controlled by essential oils and gamma radiation. Tested the effect of seven essential oils: Fennel seeds, caraway seeds, ginger rhizome, lavender flowers, cinnamon seeds, marjoram leaves and rosemary leaves at 0.5, 1, 2 and 4% (W/V) concentrations and evaluate gamma radiation effect at four rate doses (40-80-160 and 320Gy). The results showed that cinnamon oil was the most toxic and ginger was the least toxic compared other essential oils. All of essential oils used had been arranged in descending order according to their toxicities to R. dominica adults as follows: Cinnamon> caraway > marjoram> fennel> rosemary> lavender> garlic. Some of used oils have been highly toxic at low concentration in short exposure time. As well as some of other oils might be need longer exposure time and higher concentrations to achieve satisfactory control of the insects. The results obtained that mortality was increased by increasing the radiation dose and time exposure. At 15 days post-irradiation the mortality rates were 5.0, 40.0, 66.7 and 81.7% for adults irradiated at 40, 80, 160 and 320 Gy, respectively. The reduction in F1-progeny ranged from 82.4-99.5% at the same doses.

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Journal of Sohag Agriscience (JSAS)
Volume 9, Issue 1
July 2024
Pages 125-131

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