Experimental trials demonstrate significant insecticidal effects of aqueous plant extracts on Helicoverpa armigera, suggesting effective integrated pest management strategies.
Key Points
Aqueous plant extracts significantly reduced Helicoverpa armigera populations, improving tomato yield by up to 32%.
Azadirachta indica showed the strongest insecticidal activity (LC50 = 0.081%), while Vitex negundo was less effective yet performed well in the field.
Field experiments found combining Ipomoea carnea and Vitex negundo decreased larval density to 0.23, indicating a beneficial synergistic interaction.
Economic analysis revealed a cost–benefit ratio exceeding 1:1.8 for both Calotropis gigantea and Vitex negundo, supporting their viability for pest management.
Cite This Study
Mirunaliniraj et al. (2025) studied this question.