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Panonychus ulmi

European red mite

Description

Panonychus ulmi is a widespread spider mite species, considered a significant pest of fruit trees and ornamental shrubs in Europe. It overwinters in the egg stage on twigs near buds, with larvae emerging in early spring to feed on developing leaves. Several generations can occur per year, especially in warm, dry conditions. Infestation leads to discoloration, curling, and premature leaf drop, reducing photosynthetic capacity and weakening tree vitality. The species is polyphagous, recorded from hundreds of host plants including apple, pear, plum, cherry, walnut, hazel, elm, poplar, maple, and many others.

Symptom

Tiny red mites on the underside of leaves; foliage turns bronze, curls, and falls off prematurely.

Tree Species: Birch, Cherry, Pear, Apple Tree, Rowan, Whitebeam, Alder, Walnut

Part of a plant- attacked: Leaf / Needle

Pest significance: Very harmful

Pest Category: Mites

Invasive Species: No

Present in EU: Yes