Selective comparison of repellent activity with Contact toxicity of certain essential oils against different insect orders
Journal Title: International Journal of Life Science - Year 2018, Vol 6, Issue 2
Abstract
Elletaria cardamom, Merremia vitifolia and Peperomia pellucida Essential oils were tested against insects of 6 orders viz. Coleoptera, Diptera, Hemiptera, Hymenoptera, Isoptera and Lepidoptera. And were found to be effective contact toxins. For the test, a slightly modified Impregnated paper assay was used in which Absolute lethal surface concentration and duration of the test was recorded. Based on this and other parameters the toxicity potential and insect strength were compared using new indices. It was found that Merremia vitifolia essential oil was the most powerful contact toxin. Among tested Insects, Coleoptera pests of stored products was the strongest followed by larvae of Lepidoptera. While Pyrrhocoridae family was the weakest one. The contact toxicity of Peperomia pellucida essential oil was slightly lower than that of the positive control, Elletaria cardamom essential oil. Comparing contact toxicity with the potential of chemical sensitivity using certain indices, it was found that there was a huge increase in the insecticidal potential of the essential oils, when used as a repellent.
Authors and Affiliations
Aravind Gopal, PJ Benny
Keywords
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