Stephanitis pyri

Pear lace bug

Description

Stephanitis pyri, commonly known as the pear lace bug, is a pest that primarily affects pear trees but can also infest other fruit trees and ornamental plants (often Cotoneaster spp.). It belongs to the Tingidae family and is characterized by its distinctive lace-like wings and body structure. Adult bugs are small, measuring about 3-4 mm in length, and are usually pale with intricate, semi-transparent patterns on their wings. The pear lace bug Stephanitis pyri feeds on the underside of leaves, sucking sap from the plant tissues. This feeding activity results in yellowing or bronzing of the leaves, which can lead to reduced photosynthesis and overall plant vigor. Heavy infestations can cause significant damage, including leaf drop and reduced fruit yield.

Symptom

The most noticeable symptom is the yellowing or bronzing of the leaves. This occurs because the bugs suck sap from the leaves, causing a reduction in chlorophyll. The upper surface of the leaves may exhibit a stippled or speckled appearance. These tiny white or yellowish spots are a direct result of the bug's feeding activity. The presence of small, dark, tar-like spots on the underside of the leaves indicates the excrement of the lace bugs. Severe infestations can lead to premature leaf drop, which weakens the plant and reduces its ability to photosynthesize effectively.

Tree Species: Cherry, Firethorn, Pear, Apple Tree, Rowan, Whitebeam, Cotoneaster, Blackthorn

Pest significance: Harmful

Pest Category: Insects

Invasive Species: No

Present in EU: Yes