WSU Extension

Hortsense

Pine
 
Disease
Armillaria root rot 
Dwarf mistletoe 
Elytroderma needle cast 
Lophodermella needle cast 
Lophodermium needle cast 
Phytophthora root rot 
Western gall rust 
White pine blister rust 
Insect
Coneworms 
Eriophyid mites 
European pine shoot moth 
Mountain pine beetle 
Pandora moth 
Pine aphid 
Pine bark adelgid 
Pine butterfly 
Pine needle scale 
Pine needle sheathminer (Pine sheath miner) 
Sequoia pitch moth 
Spider mites 
White pine weevil 



print version| pdf version| email url    
Caption: White pine weevil damage
Photo by: A.L. Antonelli
  
Pine : White pine weevil
(revision date: 4/22/2015)


Biology
White pine weevils are brown beetles with light blotches on the highly curved back. Adults grow to about 1/4" long and feed on shoots and needles of pines and spruces. The larvae feed on needles and also mine shoot tips, often distorting or killing back the terminals and causing trees to appear deformed. Infested terminals often develop a "shepherd's crook" appearance. Adult beetles emerge in late summer (around mid-August into fall) and overwinter in organic debris on the ground. Damage is mainly aesthetic, however, the infested terminal usually dies.
Management Options


Non-Chemical Management
  • Prune out damaged terminal and train a new leader to replace it to improve tree's appearance.
  • Prune and destroy affected terminals in the summer before adult beetles emerge. This will help reduce next year's infestation.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

+ Show larger images

 
Caption: White pine weevil damage
Photo by: A.L. Antonelli