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Aceria fraxinivora

Mite Aceria fraxinivora

Description

This mite (like most other mites) is too small to be visible without use of a microscope. In early spring the mite sucking degrades ash flowers into green fleshy galls. The galls grow in size and in the second half of the year they turn brown and solidify. Sometimes cover the whole crown. During winter the galls are highly visible. They remain on the tree for two years or longer. The pest attack may extend to large-scale damage with the infested trees unable to produce seeds. It can be found mainly in the forests with ash, in parks and on roadside trees.

Symptom

Flowers turned into galls.

Tree Species: Ash

Part of a plant- attacked: Fruit / Seed

Pest significance: Less harmful

Pest Category: Mites

Invasive Species: No

Present in EU: Yes

Seasonal frequency of occurrence

Seasonal frequency of occurrence