Poplar Budgall Mite
- minute, four-legged, cigar-shaped mite; opaque white to yellow in color
- microscope or hand lens required to see mites; use symptoms for identification
Host Plants, Diet & Damage
- galls are woody and cauliflower-like; typically found on one side of the branch
- galls remain on tree year to year and are unsightly
- galls can reduce leaf production and kill branches
Biology, Life Cycle & Damaging Life Stage
- overwinter primarily in galls, and less frequently in buds
- migration of mites from galls to new buds occurs May through August
- galls may harbor mites for up to 4 years
- immatures and adults are damaging
- Damage is primarily aesthetic; tolerate pest.
- Plant resistant poplar varieties.
- Prune galls or heavily infested branches out of trees in early spring during dormancy.
- Apply horticultural oils at budbreak to target migrating mites.
- Apply an insecticide (avermectin; carbamate; METI acaracide; insecticidal soap; lime sulfur; tetronic and tetramic acid derivatives) at or just prior to budbreak.
- Do not use horticultural oils in combination with, or within 30 days of applying sulfur or a sulfur-containing product.