This psyllid infests only various varieties of pears. Mature adults overwinter, become active and mate in the spring, and move to pear trees to lay eggs on stems and developing foliage. There are normally 3 generations through the warm months, and a 4th generation in the fall which again overwinters. The summer females lay as many as 300 eggs, normally placing them along the midvein of a leaf. As the nymphs feed they exude heavy amounts of honeydew, which accumulates around them and their shed skins to form a sticky mass on the leaves. Damage is caused by loss of foliage, growth of sooty mold on fruit, and vectoring of a pathogen that causes pear decline.
Since the overwintering adults may not stay on the trees winter dormant oil applications are ineffective. Insecticide applications should be timed for the spring when the adults first begin to lay eggs on the leaves. At this time a light horticultural oil could be used without injury to the new leaves. For commercial growers there are several highly effective predatory insects that may be mass-released.