How To Get Rid Of Stink Bugs
One way to treat small nymphs in winter is with a soap spray, concentrating on the underside of leaves and the lower part of the tree.
To make the spray, add one tablespoon of pure soap flakes, such as grated Velvet soap, to half a bucket of warm water.
When the soap has dissolved in the water, fill a spray bottle and treat leaves early in the day.
TIP: Don’t use any sprays on hot days, as this can damage stressed plants even more.