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International Journal of Pure & Applied Bioscience (IJPAB)
Year : 2018, Volume : 6, Issue : 5
First page : (732) Last page : (737)
Article doi: : http://dx.doi.org/10.18782/2320-5004

Laboratory Evaluation of Leucas lavandulifolia Smith (Labiatae) Leaf Extracts Against Pulse Beetle, in Stored Green Gram Seed
(Vigna radiata L.)

C. Murasing*, P. Das, K. Sathish and L. K. Hazarika

Department of Entomology, College of Agriculture, Jorhat, Assam Agricultural University,
Jorhat, 785013, Assam, India
*Corresponding Author E-mail: murasingchitragupta@gmail.com
Received: 5.02.2018 | Revised: 14.03.2018 | Accepted: 21.03.2018  

 ABSTRACT

A laboratory experiment was conducted to investigate the efficacy of Leucas lavandulifolia Smith against Callosobruchus chinensis L. in stored green gram seed. The leaf extracts of L. lavandulifolia with petroleum ether, methanol, ethanol and water are evaluated for their adult mortality, oviposition inhibition and F1 adult emergence of C. chinensis. The results revealed that the extracts of the plant caused a considerable reduction of the number of beetles. The petroleum ether extract was found to be most effective over rest of the solvent extracts, registered the highest percent of mortality (94%) at 5% conc. after 96 hour of treatment followed by methanol (92%), ethanol (78%) and water extracts (76%) respectively. The LC50 value of petroleum ether extract of L. lavandulifolia at72 HAT recorded the lowest LC50 (2.309%).Highest oviposition deterrence was found in petroleum ether extract (61.00%), followed by methanol (60.01%), ethanol (56.52%) and water extract(47.59%) respectively at 5% conc. after 7days of seed treatment. In terms of the F1 adult emergence, petroleum ether extract at 5% conc. was found to be most effective (10.60%), followed by ethanol (11.60%), methanol (11.80%) and water extract (12.60%) respectively from 1st day to 10th days of adult emergence.

Full Text : PDF; Journal doi : http://dx.doi.org/10.18782

Cite this article: Murasing, C., Das, P., Sathish, K. and Hazarika, L. K., Laboratory Evaluation of Leucas lavandulifolia Smith (Labiatae) Leaf Extracts Against Pulse Beetle, in Stored Green Gram Seed (Vigna radiata L.), Int. J. Pure App. Biosci.6(5): 732-737 (2018). doi: http://dx.doi.org/10.18782/2320-7051.5004