Insect Science (2005) 12, 249-254

Vanit Kathuria and Nutan Kaushik (2005)
Feeding inhibition of Helicoverpa armigera (Hübner) by Eucalyptus camaldulensis and Tylophora indica extracts
Insect Science 12 (4), 249-254
Abstract: Crude leaf extracts of Eucalyptus camaldulensis and Tylophora indica were evaluated for their antifeedancy against Helicoverpa armigera larvae in no-choice bioassays. Cabbage leaf-disc dipped in different concentrations of leaf extracts was used for feeding fifth instars of H. armigera for 24 hours. Ethanol extracts from both the plant species exhibited significant feeding inhibition activity. The effective concentrations of ethanol extracts that caused 50% reduction in larval feeding (EI₅₀) were 6.9% for E. camaldulensis and 2.8% for T. indica, while these values of hexane extracts were 9.3% and 5.2%, respectively. Compared to the crude leaf extracts, crude alkaloids from T. indica and crude tannins from E. camaldulensis were more potent in reducing larval feedings.
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Link to article at publishers website

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Helicoverpa armigera