How to Get Rid of Western Conifer Seed Bugs

Confirm you have western conifer seed bugs

Correct identification matters, because the right fix for western conifer seed bugs differs from the fix for their lookalikes. Adults measure 16–20 mm (up to about 0.79 in) and are usually brown. Look for these features:

• Leaf-shaped flat widenings on the hind legs
• Faint white zigzag across the middle of the wings
• Orange and black checkered abdomen visible in flight

They are most often confused with brown marmorated stink bug, wheel bug and squash bug. See the full western conifer seed bug profile for side-by-side details.

Why you have western conifer seed bugs

Western Conifer Seed Bugs come indoors looking for food, water, warmth or shelter. Gaps around doors, windows, pipes and utility lines give them easy ways in. Clutter, leaks and food left out let a small problem grow into an infestation. They are most active in fall and winter, so expect to see more of them then.

When you'll see western conifer seed bugs

Western Conifer Seed Bugs are most active in fall and winter. In fall, many bugs look for shelter, and some move toward or into buildings. In winter, activity continues mainly indoors in heated spaces.

Typical places to check: indoors, anywhere and trees or shrubs.

Step-by-step: getting rid of western conifer seed bugs

Step 1: Seal gaps around windows

Seal gaps around windows and siding before fall. Combine this with the other steps rather than relying on it alone.

Step 2: Pick bugs up with a tissue

Pick bugs up with a tissue and release or dispose of them. Keep notes on where you still see activity so you can focus your effort.

Step 3: Repair screens

Repair screens and weatherstripping. Keep notes on where you still see activity so you can focus your effort.

Natural and low-toxicity options

These methods work well alongside the steps above and keep chemical use to a minimum:

• Vacuum insects and egg cases, then empty the canister outdoors right away.
• Wipe surfaces with soapy water to remove scent trails and residue.
• Place sticky traps to find out where activity is highest.
• Run a dehumidifier where damp areas attract them.

If you do use a pesticide, choose one labeled for this pest and the place you're treating, and follow the label exactly. The label is the law.

When to call a professional

Call a licensed pest control company if you still see western conifer seed bugs after three to four weeks of steady effort, if they are spreading to several rooms, or if you share walls with neighbors who have the same problem.

How to keep western conifer seed bugs from coming back

• Seal cracks and gaps with caulk and install door sweeps.
• Store food in sealed containers and take out trash often.
• Fix leaky pipes and faucets and keep basements dry.
• Trim shrubs and branches so they don't touch the house.
• Keep firewood, mulch and debris away from the foundation.

Safety notes

Western conifer seed bugs don't bite or sting; they may release a pine-like odor.

Keep children and pets away from any traps, baits or treated areas.

About true bugs

The western conifer seed bug is one of the true bugs. True bugs have piercing, straw-like mouthparts used to suck plant sap or, in a few species, blood. They develop through gradual metamorphosis: nymphs look like small, wingless adults and molt several times as they grow. Many release strong odors from scent glands when threatened.

Because nymphs look like adults, you'll often see mixed sizes of the same bug together, which is a good sign that a population is breeding nearby.

Frequently asked questions