WSU Extension

Hortsense

Spruce
 
Disease
Oil discoloration of foliage 
Rhizosphaera needle cast 
Rust 
Insect
Coneworms 
Cooley spruce gall adelgid 
Douglas fir tussock moth 
Pine needle scale 
Spruce aphid 
Spruce bud scale 
Spruce budworm 
Spruce needleminer 
Spruce spider mite 
White pine weevil 



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Caption: Coneworm on pine
Photo by: K. Grey
  
Spruce : Coneworms
(revision date: 4/20/2015)


Biology
Coneworms attack the green cones of spruce by burrowing into them and feeding. They may also bore into shoot tips, causing tip dieback, or feed on the soft bark of young growth. The coneworms are small and creamy or light brown in color with a darker head. The adult coneworm is a mottled gray moth. Coneworms also attack pines, hemlocks, true firs, and Douglas fir.
Management Options

Non-Chemical Management
  • Remove and destroy infested cones when possible.
  • Plant non-susceptible conifers where coneworms are a serious pest.
  • Natural enemies of the coneworm are likely.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Coneworm on pine
Photo by: K. Grey
Caption: Coneworm damage
Photo by: L.J. du Toit