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VOL. 7, ISSUE 1 (2022)
Insecticidal activity of an indigenous plant of Kerala against IV instar larvae of Helicoverpa armigera (Hübner)
Authors
Sajani Jose, Nimmy M V
Abstract
The cotton bollworm Helicoverpa armigera is a serious pest of many economically important crops. Since this pest has become resistant to the conventional synthetic insecticides, newer compounds and formulations are being developed against this insect pest. Many natural compounds isolated from the plants were tested against this pest. In the present study, indigenous plant, widely distributed plants of kerala, namely, Gliricidia sepium were screened for their insecticidal activity against fourth instar larvae of the cotton bollworm, Helicoverpa armigera (Hübner) under laboratory conditions. The crude extracts of the plants demonstrated a dose dependent increase in bioactivity. Phytochemical analysis of the extracts of the plants, revealed the presence of different phytocompounds each of which is known to have deleterious effect on insect pests. Thus, it may be concluded that the petroleum ether leaf extract of Gliricidia sepium possess insecticidal property and can be further investigated for the development of a potent botanical insecticide. According to the results the percentage mortality of H. armigera larvae varied among the treatments. From the results it has been noted that the petroleum ether extract was effective against fourth instar larva of H. armigera larvae both on contact and by feeding.
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Pages:89-92
How to cite this article:
Sajani Jose, Nimmy M V "Insecticidal activity of an indigenous plant of Kerala against IV instar larvae of <em>Helicoverpa armigera </em>(Hübner) ". International Journal of Entomology Research, Vol 7, Issue 1, 2022, Pages 89-92
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