Electronically Recorded Disturbances in Feeding Behavior ofNephotettix virescens(Homoptera: Cicadellidae) on Neem Oil-treated Rice Plants
- 1 February 1985
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 78 (1) , 222-226
- https://doi.org/10.1093/jee/78.1.222
Abstract
Using an electronic device, the feeding behavior of a leafhopper, Nephotettix Virescens (Distant), was monitored on rice plants sprayed with seed oil from the neem (Azadirachta indica A. Juss) tree. Application of neem oil to rice plants disrupted the normal feeding behavior of the leafhopper. Phloem feeding by the insect on plants sprayed with neem oil at 1.25, 2.5, 5, or 10% concentrations was significantly (P < 0.05) reduced compared with control plants sprayed with acetone. Phloem feeding was erratic on plants sprayed with 5 and 10% neem oil, as evidenced by repeated voltage reversals in associated waveforms. Reduced intake from phloem on neem oil-treated plants was associated with a significant (P N. virescens survival on neem oil-treated rice plants and a corresponding decrease in its ability to transmit the tungro virus.Keywords
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