Filbert: Filbert bud mite
categories: Filbert Filbert Insects Tree Fruits
last review date: 2025-09-14 10:20
Biology
Filbert bud mites are tiny eriophyid mites which feed in the leaf and flower buds. The mites are yellowish and sausage-shaped and are difficult to see with the unaided eye.
Mite feeding causes the buds to thicken and enlarge, resulting in a condition called “big bud”. The swollen, infested buds fail to grow normally and do not produce fruit. The buds turn dark reddish-brown as they mature.
Management Options
Use Integrated Pest Management (IPM) for successful plant problem management.
Non-chemical Management
Select non-chemical management options as your first choice!
- Plant “tight-budded” varieties such as ‘Barcelona’, which are less susceptible to bud mite attack. Loose-budded varieties such as ‘Daviana’ and ‘Royal’ are more susceptible.
Chemical Management
IMPORTANT: Visit Home and Garden Fact Sheets for more information on using pesticides.
- None recommended.
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Evidence of noncompliance may be reported through your local Extension office.

