Pear sucker

Cacopsylla pulchella is a species of jumping plant lice within the Psyllidae family and the Hemiptera order. It is recognized as a significant pest of orchard crops, with a specific affinity for pear trees, where it causes persistent damage to foliage and shoot development.

The insect thrives by feeding on the phloem sap of the host plant. By piercing the leaf tissue and extracting fluids, the pest causes severe stress to the tree. If left unmanaged, heavy infestations can lead to reduced vigor, stunted shoot growth, and a significant decline in fruit yield over several growing seasons.

The life cycle of this species includes eggs, five nymphal instars, and the adult stage. The pest overwinter as adults, finding shelter in bark crevices or under debris. As temperatures rise in early spring, they emerge to feed on developing buds. Multiple generations can occur throughout the growing season, depending on the climatic region and temperatures.

Damage is characterized by the curling and yellowing of leaves. Furthermore, nymphs secrete large quantities of honeydew, a sticky substance that promotes the growth of sooty mold. This fungal growth blocks sunlight and impedes photosynthesis, ultimately leading to leaf senescence and lower fruit quality in terms of sugar content and size.

Control measures must be applied systematically:

• Dormant oil applications during the winter or early spring to reduce the overwintering population.
• Targeted use of insecticides during the nymphal stages, particularly before the secretion of heavy wax or honeydew.
• Pruning to remove infested shoots and improve canopy ventilation.
• Encouraging natural predators such as lacewings and ladybirds to regulate pest numbers organically.