Western Conifer Seed Bug (Leptoglossus occidentalis) Identification


The Western Conifer Seed Bug isn’t seen very much during the summer months. Its summer habitat is among pine trees, Douglas firs and other types of cone-producing trees. The main diet of this bug comes from the seeds of the cones. The Western Conifer Seed Bug becomes mainly visible during the fall season when it looks for warm places to overwinter. Here are some facts and frequently asked questions about the Western Conifer Seed Bug:

Western Conifer Seed Bug Facts and Frequently Asked Questions

Common Name: Western Conifer Seed Bug (Leptoglossus occidentalis)

What do they look like? Shades of brown with yellow and black markings on its abdomen and is approximately ¾-inch long when matured. Long antennae and “leaf-footed” legs.

Where are they commonly found? In the summer, the Western Conifer Seed Bug is normally found in cone-producing trees, such as Douglas firs and a variety of pine trees. This bug can be plentiful near and around tree farms and nurseries. During the summer, the insect is outdoors in these areas. In the winter months, it will seek the warmth of structures to overwinter in.

Who commonly gets infested? Residential or commercial areas that have a large population of cone-producing (conifer) trees and shrubs. As temperatures cool, the Western Conifer Seed Bug will seek out residential or commercial buildings to overwinter in. These types of structures can include:

• Tree plantations, farms and nurseries
• Residential homes or multi-family dwellings
• Kennels and stables
• Schools
• Healthcare facilities
• Motels, hotels and resorts

When do they commonly infest? Infestation of Western Conifer Seed Bugs can occur year-round in areas with large cone-producing trees and shrubs. The infestation will be most noticeable during the fall and winter months when the seed bug moves indoors.

Why are they in my home and business? The Western Conifer Seed Bug moves indoors to find warmth and overwinter during fall and winter months. They don’t reproduce while indoors.

Why should I treat for them? Treatment for the Western Conifer Seed Bug should be done for protection of outdoor landscaping and indoor pest control. Although the insect is not harmful to humans or their pets, it emits a foul odor when disturbed or crushed. Large populations of them in a structure can be upsetting, especially as they fly around if the temperatures rise during the winter months.

How do you treat for them? Treatment of Western Conifer Seed Bugs involves our highly trained technicians finding the infestation area and treating it with pest control products to eliminate the insects. This may include both indoor and outdoor areas where the bug may congregate in large populations. Structures will be investigated through gaps, crevices and other areas where the bug can gain access. Repairs or modifications should be made to reduce future infestations.

How much service is typically required? Depending on the severity of the Western Conifer Seed Bug infestation, services can be done on a one-time basis, or a year-round elimination/preventative maintenance plan may be needed.

The Western Conifer Seed Bug can be quite destructive to tree farms and nurseries and very irritating when indoors. Our experienced technicians will stop the infestation safely, effectively and affordably. Trust SEE Pest and Lawn Solutions for professional care, peace of mind and lasting results. For more information on the Western Conifer Seed Bug, contact us today at 610-287-9804.