Ovicidal Effect of Thompson-Hayward TH 6040 in Diaprepes abbreviatus on Citrus in Florida13

Abstract
In field tests, Thompson-Hayward TH 6040 ( N -(4-chlorophenyl)-N′-(2-6-difluorobenzoyl)urea) applied by air at a rate of 283 g AI/acre was effective for at least 26 days in reducing the reproductive potential of Diaprepes abbreviatus (L.). Egg hatch was reduced from 71 to 15% when weevils were continuously exposed to a 0-, to 26-day-old residue in the grove. Exposure of 3 days or less was not effective in reducing total egg hatch.

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