Mountain ash (Sorbus)-Cherry bark tortrix

Enarmonia formosana

Pest description and damage Cherry bark tortrix is a pest of most woody ornamental trees and shrubs in the family Rosaceae. The larvae are 0.33 to 0.4 inch long, pale gray to flesh-color with small, pale gray spines scattered on the surface, with a yellowish-brown head. Larvae feed directly on the cambium tissues under the tree bark and may cause death of the tree in sufficient numbers. Otherwise, the feeding activity decreases the supply of nutrients to the tree and increases susceptibility to disease, insect attack, and environmental stress, including cold injury. The first indication of attack is the exuding of reddish-brown gum-like resin, which often is mixed with fecal pellets and silk. The trunk and larger limbs of bearing fruit trees are affected at pruning wounds or graft unions.

For biology, life history, monitoring and management


Management-chemical control

See Table 4 in: