Studies on Dicrodiplosis manihoti Harris (Diptera, Cecidomyiidae), a common predator of mealybugs.
Biweekly sampling of 4 species of mealybugs infesting fruit and ornamentals in Salalh, Sultanate of Oman, showed that Dicrodiplosis manihoti was found to associate with the long-tailed mealybug, Pseudococcus longispinus and citrus mealybug, Planococcus citri. The predator occurred almost all the year round and preyed on nymphs and adult females. Biological studies showed that the incubating period of the predator egg averaged 2.8 days. The larval stage lasted 11.4 days and consumed an average of of 5.6 adult females of the long-tailed mealybug. The pupal stage lasted 10.1 days. The total number of eggs deposited per female averaged 36 during her very short life span which averaged 2.3 days.