Abstract
Infestations of Ceratitis capitata (Wiedemann) in summer fruits in Tunisia were reduced 80–100% when treatments of technical (95%) malathion and PIB-7 (protein hydrolyzate) were applied by air at a rate of 300 cc toxicant and 1200 cc protein/ha to strips 50 m wide that were alternated with untreated strips 200 m wide. Also, treatments reduced the population of adult flies 84.9% (range 54.8–94.6%) on the basis of trap catches. When the untreated strips were 450 m wide, the population was reduced 68.4% on the basis of trap catches and 80.1 % on the basis of the number of larvae found in figs. Treatments were begun in July during the initial buildup of the population and were continued through September. Nevertheless, 33–50% less toxicant was used than is used for the standard full-coverage fall applications used to protect citrus crops, and all susceptible crops received protection, not just citrus.
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