Don’t even touch these if you notice them on your plants (and you’ll DEFINITELY see them, I promise). My neighbor had no idea about these, and thank God I told her. I
If you see these, do not “touch” them in the sense of leaving them be or moving them; you need to destroy them immediately. Once they hatch, these invasive pests will pierce the skin of your fruits and vegetables (tomatoes, peppers, and apples are favorites), leaving behind “cat-facing” scars and rot that can ruin an entire season’s harvest.
Identification & Strategy
The Brown Marmorated Stink Bug (Halyomorpha halys) is an invasive species from East Asia. Because they have few natural predators in North America and Europe, their population can explode if these egg clusters aren’t managed.
The Lifecycle
- The Look: Clusters of 20–30 eggs, usually laid on the underside of leaves. They are pale green when fresh but turn black with a distinct “star” or gear-like pattern as they mature.
- The Hatch: Within 3–7 days of turning black, the nymphs will emerge. They are tiny, red-and-black tick-like insects that stay in a tight group before spreading out to eat your plants.
- The Damage: They inject a digestive enzyme into the plant to “liquefy” the tissue. This causes spotting, pitting, and internal browning.
How to Remove Them (The “Search and Destroy” Method)
You don’t need pesticides for this stage. In fact, most garden-variety sprays aren’t very effective against the egg casing.
1
The Tape Method
Best for small clusters
Take a piece of heavy-duty packing tape or duct tape. Press it firmly against the egg cluster and peel it away. The eggs will stick to the tape.
2
Neutralize
Don’t just throw them away
Fold the tape over itself to crush the eggs, or drop the tape into a small container of soapy water (dish soap and water). This ensures they cannot hatch in your trash can.
3
Inspect the Underside
Check the whole plant
Stink bugs are masters of disguise. Check the undersides of every leaf on the affected plant. If you find one cluster, there are almost certainly more nearby.
4
Leaf Removal
If the tape fails
If the eggs are stuck too firmly, simply snip the leaf off the plant and drop the entire leaf into your soapy water bucket.
Why you shouldn’t just “squish” them on the leaf: While squishing works, the crushed eggs can attract other opportunistic pests. The tape-and-drown method is much cleaner and ensures 100% mortality for the cluster.
If you miss the eggs and see a huddle of tiny red and black bugs, use a handheld vacuum to suck them up or knock them into your soapy water bucket immediately. Once they reach the adult stage, they develop a hard shell and become much harder to kill.
