These water-molasses traps capture both sexes. Pheromone traps that only collect males cannot control codling moth. These aphid-like Insects suck the sap from the leaves and produce large, sticky drops of honeydew that can coat the tree and fruit. Heavy infestations also greatly weaken pear trees. Pear psylla nymph in honeydew.
Pear psylla spend the winter near previously infested pear trees.
They return in early spring, typically around late March in the Grand Junction area. Once on the trees, they begin to feed and lay eggs, producing several generations throughout the growing season. Pear psylla are highly resistant to most available insecticides. Oil sprays, sometimes combined with an insecticide, can be effective when applied during the dormant season shortly after the pear psylla adults return to the trees. Cooperative Extension codaphone messages in the Western Slope fruit-growing areas can aid accurate timing of pear psylla treatments.