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Effect of Mixtures of Custard-Apple Oil and Neem Oil on Survival of Nephotettix virescens (Homoptera: Cicadellidae) and on Rice Tungro Virus Transmission

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Mixtures of seed oils of custard-apple, Annona squamosa L., and neem, Azadirachta Indica A. Juss, in 1:1, 1:2, and 1:4 proportions (vol/vol) at 5, 10, or 20% concentration were significantly more effective in reducing the survival of a leafhopper N. virescens (Distant) and its transmission of the rice tungro virus than the spray application of individual oils on rice seedlings. Even at 5% concentration, the 1:4 mixture of custard-apple oil and neem oil was as effective as 20% custard-apple oil. The potentiation of the insecticidal action in custard-apple oil and neem oil mixtures is of added value in the control of the vector.

Document Type: Research Article

Publication date: April 1, 1984

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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