Pale green weevil
Beginner
Scientific Name
Polydrusus impressifrons
Identification
- Adults:
- Less than 7 mm long,
- Pale green in colour.
- Damage:
- Ragged appearance on the leaf edges,
- The main feeding will be over in a few weeks and the tree will compensate with increased growth.
Often Confused With
- Spring feeding caterpillar damage- Leaves chewed by the pale green weevil are more ragged on the edges, and often beetles can be seen congregating in the orchard.
Period of Activity
Beetles emerge in the spring (May thru June). The main feeding will be over in a few weeks.
Scouting Notes
From May through petal fall monitor for leaf damage, and for the presence of adults, during regular orchard scouting.
Thresholds
None established. No special treatments are needed for this insect.
Advanced
Scientific Name
Polydrusus impressifrons
Identification
Adult weevils are less than 7 mm long and pale green in colour. They will sometimes chew on the leaves of peach, cherry, apple, or pear trees, creating a ragged appearance by notching the leaf edges. Although the presence and feeding damage to leaves can be alarming, trees are generally able to compensate admirable once the beetles have had their fill. The main feeding will be over in a few weeks and the tree will compensate with increased growth.
Often Confused With
- Spring feeding caterpillar damage- Leaves chewed by the pale green weevil are more ragged on the edges, and often beetles can be seen congregating in the orchard.
Biology
This weevil has a similar life history to the European snout beetle. The beetles overwinter as mature larvae in the soil beneath host plants. The adult weevils emerge in the spring (May thru June), and begin feeding.
Period of Activity
Beetles emerge in the spring (May thru June). The main feeding will be over in a few weeks.
Scouting Notes
From May through petal fall monitor for leaf damage, and for the presence of adults, during regular orchard scouting.
Thresholds
None established. No special treatments are needed for this insect.
Management Notes
- No diseases or other problems have been linked to pale green weevils feeding on fruit trees.
