Neem seed derivatives for preventing rice tungro virus transmission by the green leafhopper, Nephotettix virescens Distant (Philippines)
1985
Saxena, R.C. | Khan, Z.R. | Bajet, N.B.
Neem (Azadirachta indica A. Juss) seed oil and cake showed potential for preventing rice tungro virus transmission by the green leafhopper, Nephotettix virescens Distant. Neem oil and neem cake disrupted the normal feeding behavior of N. virescens. The insect shifted from phloem to xylem ingestion on rice plants treated with neem oil or neem cake, or kept in an arena permeated with neem oil odor. Protection of rice seedlings grown in soil incorporated with 150 and 250 kg neem cake/ha against rice tungro virus was comparable to that conferred by Furadan treatment. The reduction in the leafhoppers ability to transmit the tungro virus on neem oil-or neem cake-treated plants could be attributed to a reduction in phloem feeding and associated aberrations in the insect feeding behavior
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