The life stages of the Deodar weevil are similar in appearance to those of the white pine weevil. Where their geographic ranges overlap, identification of the pest is usually based on the host species and the portion of the tree infested. Identifying the Injury. Infestations usually remain unnoticed until the following January, when infested branches begin to turn brown. Small trees may be girdled and killed.
Adults feed occasionally during the summer.
Feeding activity increases just prior to and during the fall reproduction period. Photo by Gerald Lenhard Larvar in chip cocoon. Photo by Gerald Lenhard Females lay from one to four eggs in feeding punctures. The newly hatched larvae bore into the inner bark, where they construct winding galleries which girdle the stem. Winter is spent in the larval stage.