Western Pine Beetles
Dendroctonus brevicomis
Destructive bark beetles that attack ponderosa and Coulter pines from Baja California north to western Canada. Larvae are white, curved, rice grain-sized and feed in inner bark. Adults create winding, crossing egg galleries forming network patterns under bark.
Identification & Symptoms
What to Look For
Potential Damage
Lifecycle
Flight starts late spring or early summerActivity continues until stopped by cold weatherOne to two generations annually in northern range1.5 to 4 generations in southern rangeYear-round activity in southern areasAdults create irregular crossing gallery networks
Professional Treatment Approach
Preventive insecticide treatments for high-value trees
Remove and destroy infested trees promptly
Reduce tree stress through proper care
Maintain adequate soil moisture
Avoid wounding during maintenance activities
Monitor for early detection of infestations
Recommended Mauget Products
Imicide
Professional-grade treatment specifically effective against western pine beetles.
View Product DetailsTree-äge
Professional-grade treatment specifically effective against western pine beetles.
View Product DetailsNeed Professional Diagnosis?
Our certified arborists can help you accurately identify tree problems and develop an effective treatment plan using Mauget's proven injection systems.