International Journal of Zoology Studies

International Journal of Zoology Studies


International Journal of Zoology Studies
International Journal of Zoology Studies
Vol. 2, Issue 6 (2017)

Evaluation of repellency and antifeedant activities of Saraca asoca and Terminalia arjuna Bark extracts against Sitophilus oryzae


S Gomathi, KM Subbu Rathinam

The rice weevil Sitophilus oryzae (L.)(Coleoptera: Curculionidae), is one of the mostimportant stored grain pest in India and has beenspread worldwide by commerce. Plants have developed subtile chemical defense mechanisms against insects and other organisms; these defense mechanisms do not generally produce immediate death but do affect common biochemical and physiological functions. In this study, we evaluated the repellency and antifeedant activities of Saraca asoca and Terminalia arjuna bark extracts to control Sitophilus oryzae. The repellent activityagainst S. oryzae adults was more pronounced inmethanol extract of Terminalia arjuna barkas compared withSaraca asoca bark extract. The antifeedant activity against S. oryzae adults was greaterinmethanol extract of Terminalia arjuna barkas compared withSaraca asoca bark extract. The potential insecticidal, repellent and antifeedant activity of Saraca asoca and Terminalia arjuna bark extracts might be present in bioactive compounds. Therefore, Saraca asoca and Terminalia arjuna could be considered an ideal grain (Rice) protectant from the point of viewof seed viability and safety to mammals.
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How to cite this article:
S Gomathi, KM Subbu Rathinam. Evaluation of repellency and antifeedant activities of Saraca asoca and Terminalia arjuna Bark extracts against Sitophilus oryzae. International Journal of Zoology Studies, Volume 2, Issue 6, 2017, Pages 282-285
International Journal of Zoology Studies