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Antifeedant activity of plant extracts to an insect Helopeltis theivora.
J Environ Biol ; 2010 Sept; 31(5): 557-559
Article in English | IMSEAR | ID: sea-146460
ABSTRACT
The different solvent extracts (viz Petroleum ether, Ethyl acetate and Methanol) obtained from leaves and flowers of Heliotropium indicum and Spilanthes calva were screened for antifeedant activity against Helopeltis theivora. All the six different extracts showed antifeedant activity at four different concentrations. The methanolic extracts of leaves of Heliotropium indicum and Spilanthes calva exhibited significant activity at 4% concentration. The numbers of spots produced were only 18.67 and 22.67 respectively, which are significantly less than the number of spots produced in control (104.00 and 93.33 respectively). The treatment with methanolic extracts of flowers of both the plants significantly reduced the number of feeding spots to 22.33 and 23.67 respectively in comparison to the control values of 101.33. All the activities are dose dependent. The mean results with SEM (mean±SE) were statistically significant at 1% level (p<0.01) for three observations.

Full text: Available Index: IMSEAR (South-East Asia) Language: English Journal: J Environ Biol Year: 2010 Type: Article

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Full text: Available Index: IMSEAR (South-East Asia) Language: English Journal: J Environ Biol Year: 2010 Type: Article