Abstract
In laboratory and greenhouse tests, suspensions containing low concentrations of azadirachtin and salannin, compounds isolated from ethanolic extracts of neem seeds, Azadirachta indica A. Juss., possessed activity as feeding deterrents against the striped cucumber beetle, Acalymma vittatum (F.), and the spotted cucumber beetle, Diabrotica undecimpunctata howardi Barber. The chemicals were particularly active against the striped cucumber beetle, the more serious pest of muskmelons. In greenhouse and seed bed tests, the protection provided by azadirachtin against the striped cucumber beetle was not as great as the protection provided by carbaryyl.
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