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 



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Caption: Sequoia pitch moth
Photo by: S.J. Collman
  
Pine : Sequoia pitch moth
(revision date: 4/23/2014)


Biology
The larvae of the sequoia pitch moth feed by boring into branches or trunks. At the point where the larva enters the wood, small to large masses of white to pinkish pitch accumulate. The larva feeds locally underneath the pitch mass. Although healthy trees are occasionally attacked, stressed trees are most vulnerable. Branch crotches are also sometimes infested. Adults are black and yellow clear-winged moths that somewhat resemble yellowjackets. This pest causes mainly aesthetic damage (the pitch masses). Incidentally this pest does not attack Sequoia.
Management Options


Non-Chemical Management
  • Prune susceptible trees (pines, Douglas fir) only when egg-laying females are not active (around October to March).
  • Avoid mechanical injury to trunks and branches which may provide sites for infestation.
  • Remove pitch masses and associated larvae by hand.
Select non-chemical management options as your first choice!

Chemical Management

None recommended

Images

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Caption: Sequoia pitch moth
Photo by: S.J. Collman