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Cecidophyopsis psilaspis

Yew big bud mite

Description

Cecidophyopsis psilaspis, commonly known as the yew big bud mite, is a gall mite that infests yew trees (Taxus spp.), particularly the English yew (Taxus baccata). This mite is prevalent throughout Europe and has also been reported in North America. The mites are microscopic and reside within the buds of their host plants. Infested buds become enlarged, with inner leaves becoming fleshy and distorted, leading to the formation of galls. Severe infestations can cause bud death, resulting in reduced growth and potential aesthetic damage to the tree. Additionally, these galls can serve as entry points for secondary infections, further compromising the health of the yew.

Symptom

Infested buds swell to 3–10 mm, with inner leaves becoming fleshy and distorted. These galls may contain multiple generations of whitish mites.

Tree Species: Yew

Part of a plant- attacked: Branch

Pest significance: Less harmful

Invasive Species: No

Present in EU: Yes