Bioefficacy of Blumea mollis (D. Don) Merr. and Hygrophila schulii (Buch.-Ham.) (Syn. H. auriculata) against Helicoverpa armigera (Hübner)

Baskar, K. and Santosh Kumar, A. and Raj, G.A. and et al, . (2014) Bioefficacy of Blumea mollis (D. Don) Merr. and Hygrophila schulii (Buch.-Ham.) (Syn. H. auriculata) against Helicoverpa armigera (Hübner). Archives Of Phytopathology And Plant Protection. pp. 1-12.

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Abstract

Indiscriminate use of synthetic pesticides to control the pests causes negative effects on non-target organisms. Some of the chemicals under B and C categories are carcinogenic to humans. The present study was aimed to assess the antifeedant, larvicidal and pupicidal activities of Hygrophila schulii (syn. H. auriculata) and Blumea mollis against Helicoverpa armigera. Maximum antifeedant activity of 70.01% was observed in ethyl acetate extract of H. schulii at 5.0% concentration with LC50 value of 2.0%. B. mollis ethyl acetate extract at 5.0% concentration showed antifeedant activity of 35.40% with LC50 value of 8.38%. The data for antifeedant activity showed homogeneity of variances in Levene Statistics and normality in Shapiro–Wilk test. Ethyl acetate extract of H. schulii at 5.0% concentration showed 68.66% larvicidal activity with LC50 value of 2.97%. It also showed 73.33% pupicidal activity and was statistically significant from other treatments. No pupicidal activity was observed in ethyl acetate extract of B. mollis. All concentrations of ethyl acetate extract of H. schulii showed promising biological activities which differed statistically from other treatments. Ethyl acetate extract of H. schulii could be used to develop new botanical formulations to manage agricultural pests.

Item Type: Article
Uncontrolled Keywords: antifeedant, larvicidal, pupicidal, solvent extract
Author Affiliation: Entomology Research Institute, Loyola College, Chennai, India
Subjects: Plant Protection
Divisions: General
Depositing User: Mr Siva Shankar
Date Deposited: 18 Mar 2014 08:26
Last Modified: 18 Mar 2014 08:26
Official URL: http://dx.doi.org/10.1080/03235408.2014.893633
URI: http://eprints.icrisat.ac.in/id/eprint/12891

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