Consult the labels for dosage rates, safety precautions and where applicable, preharvest intervals. Use of pheromone traps will assist in timing the sprays. In Connecticut, this beetle is one of the most destructive pests of quince fruit. After spending the winter in the soil, the larvae form pupae in spring. The adults appear in midsummer, usually about the middle of July.
Females lay eggs singly in fruit.
After the eggs hatch 7-10 days later, the larvae tunnel into the flesh of the fruits, rarely reaching the core. Adult curculios can be controlled on quince fruit trees by applying phosmet, which is among the compounds registered for use against this pest in Connecticut, at petal fall and again about 10 days later. Consult the label for dosage rates, safety precautions and preharvest intervals. The caterpillars of this moth cause minor foliar damage to quince and apple. In May, the tiny adults emerge from pupae that have overwintered in cases on the tree.