White Pine Weevils

Facts, Identification, & Control

Scientific Name

Pissodes strobi

Appearance

What Do They Look Like?

  • Size: They measure between 6 to 7 mm in length.
  • Color: Adults are easily identified by their unique rust coloration and feature brown and white scales along their wings.
  • Characteristics: White pine weevils are equipped with long, beak-like snouts.

How Did I Get White Pine Weevils?

The white pine weevil feeds on several species of conifer plants and is considered to be the most destructive pest of white pines in the eastern United States. These insects are serious threats to spruce and pine trees, and their damage is recognized by spots of tree resin that collects on the plant’s terminal leaders. The pests thrive wherever these tree species grow. While the mature form of the insect is destructive, white pine weevil larvae cause most of the damage.

How Serious Are White Pine Weevils?

The pests pose no danger to people, but white pine weevils create serious problems for healthy trees and ornamentals. As is suggested by their name, these weevils most commonly infest white pine and spruce trees. However, specimens may also be found on black spruce and lodge pole pines. Most infested trees wilt, while some grow crookedly or exhibit stem deformation.

Signs of Infestation

An invasion of these insects often cripples plants, leaving them open to disease or decay. Droplets of resin and small holes in the trees may indicate white pine weevil activity, in addition to:

  • Brown needles
  • Crooked tops
  • Fallen branches

How Do I Get Rid of White Pine Weevils?

What Orkin Does
Your local Orkin technician is trained to help manage white pine weevils and similar pests. Since every building or home is different, your Orkin technician will design a unique program for your situation.

Orkin can provide the right solution to keep white pine weevils in their place…out of your home, or business.


Behavior, Diet, & Habits

What Do They Eat?
White pine weevils puncture holes in the bark of trees to begin feeding. These punctures appear in early summer months and may ooze a light resin. In May and June, they will begin to scab over.

Most damage caused by a white pine weevil infestation is due to the feeding habits of larvae, which are white with brown head markings. They infest the roots of trees and can lead to the death of the host.

Reproduction
White pine weevils reproduce only once each year. Adults emerge in early spring and move to infest host trees. These weevils mate in the fall and eggs are laid in host trees in the spring. Eggs hatch within 10 days, but adults do not remain with their larvae.

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