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Journal of Entomology and Zoology Studies
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ISSN Print: 2349-6800 | ISSN Online: 2320-7078

Journal of Entomology and Zoology Studies

2014, Vol. 2, Issue 4
Assessment of repellency and insecticidal activity of Ajuga parviflora (Benth) and Trichilia connaroides (W&A) leaf extracts against stored product insects.

Guruprasad B R, Akmal Pasha

Repellency behavior and insecticidal activities of plant extracts of Ajuga parviflora and Trichilia connaroides were studied against stored product insects viz., the lesser grain borer Rhyzopertha dominica (F.), and the red flour beetle Tribolium castaneum (Herbst). The area preference method and dose-mortality was used to determine the repellency rate and insecticidal activity. The average repellency of the methanol, petroleum ether and ethyl acetate extract concentrate per cm2 of bothplant leaves totally achieved class II, III, class IV and class V repellency respectively at different intervals (2, 4, 8 hours) of time. The methanolic extract of A. parviflora and T. connaroides showed maximum repellency behavior compared to other solvent systems.This extract was also found to be more effective than the commercial product teflubenzuron (No: SZBB291XV) and also more effective than other solvent extracts mentioned above. Our results indicate that the repellency behavior was dose and extract dependent and dose-mortality of the methanolic extract varied depending on the insect species. Moreover, T. castaneum was susceptible to methanolic extract of A. parviflora and R. dominica was more susceptible to T. connaroides extract.
Pages : 221-226 | 1170 Views | 12 Downloads
How to cite this article:
Guruprasad B R, Akmal Pasha. Assessment of repellency and insecticidal activity of Ajuga parviflora (Benth) and Trichilia connaroides (W&A) leaf extracts against stored product insects.. J Entomol Zool Stud 2014;2(4):221-226.
Journal of Entomology and Zoology Studies
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