Spray Oil Effects on Diaprepes abbreviatus on Citrus in Florida13

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Abstract
The feeding of Diaprepes abbreviatus (L.) on citrus foliage was significantly affected by an aerial application of Florida citrus oil (FC 435-66) at a rate of 23.5 liters/ha. Also, reproductive potential was significantly reduced, though fecundity and fertility were not affected, because the oil physically impaired the bond between eggs and foliage, and wind and rain caused eggs to be come mechanically unattached. Unattached eggs were removed by predators. The resulting physical, mechanical, and biological increase in mortality of eggs for one month after the spray application resulted in a 72% loss of weevil eggs.

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