Integrated Pest Management

More In-Depth Information

Poplar Bud Gall Mite

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Poplar bud gall mite damage
 Poplar bud gall mite damage

HOSTS

  • Poplars
  • Cottonwoods
  • Aspens

DESCRIPTION

The poplar bud gall mite (Eriophyes parapopuli) is an eriophyid mite. It is microscopic and about one-fourth the size of a spider mite (0.2 mm long). Adults are reddish and spindle-shaped.

BIOLOGY

Poplar bud gall mites overwinter inside galls on the tree or under bud scales. Mites start activity in April and continue through September. From about May through August, some mites migrate to new leaf buds and form new galls. Mites may remain active inside a gall for up to 4 years.

SYMPTOMS

  • 3-4cm woody galls on buds

GENERAL MANAGEMENT

Galls or the affected twigs or branches should be pruned in early spring when the tree is dormant and the mites are still overwintering in the galls. To avoid reinfestation, bury, burn, or otherwise dispose of removed galls.

INSECTICIDES

For heavy infestations, apply an insecticide after budbreak, usually about mid-April or later. Insecticides recommended for this pest include dormant oil (an organic option) or carbaryl.

Precautionary Statement: Utah State University and its employees are not responsible for the use, misuse, or damage caused by application or misapplication of products or information mentioned in this document. All pesticides are labeled with ingredients, instructions, and risks, and not all are registered for edible crops. “Restricted use” pesticides may only be applied by a licensed applicator. The pesticide applicator is legally responsible for proper use. USU makes no endorsement of the products listed in this publication.