Western Conifer Seed Bug
Leptoglossus occidentalis
Identification
- 5/8 – 3/4 inch long
- overall brownish color; yellow-orange upper abdomen with 5 black patches visible during flight
- flat, leaf-like projections on hind legs
- emit a piney odor when handled
- similar in appearance to western leaf-footed bug; distinguished by absence of thorn-like projection extending from the head
Nesting Habits
- develop on pines, Douglas-firs and other conifers
Diet
- primarily seeds of pines and Douglas-fir
Significance
- common invader of homes as individuals or in small clusters
- seek overwintering sites indoors when cold fall weather begins (September – October)
- major outbreaks/migrations can occur in the fall
- resemble kissing bugs (Triatoma spp.) but pose no threat to human health
IPM Recommendations
- Eliminate weeds in landscaping around the building.
- Equip foundation and attic vents with tight-fitting screens during warmer months.
- Find and seal any exterior cracks.
- Vacuum conifer seed bugs found in- or outdoors.