The woolly apple aphid (Eriosoma lanigerum) is a serious pest of apple trees, other fruit trees, ornamental trees, and some popular backyard shrubs. The pests cause many issues for the hosts as they ...

The differences in how Washington apple growers battle pests in conventional and organic orchards may help Washington State University researchers decode the behavior of the woolly apple aphid.

Q: My wife wants to cut our 12-foot red twig dogwood practically to the ground, because only the twigs at the top of the shrub are colorful. I told her it would kill it. Am I right? A: Don’t bet a ...

INSECTS The spirea aphid, Aphis spiraecola, an invasive pest, has been discovered for the first time in Denmark by University of Copenhagen researchers. The extent of its current distribution remains ...

Some of the leaves on my serviceberry and hawthorn have an ugly black residue on them. When I looked more closely at the trees, I noticed some things that looked like little cotton balls here and ...

Question: I think my peach tree has aphids, but how can I be sure? A: Green peach aphids are the most common aphids on peach trees. They are small and can be difficult to detect, but their damage is ...

This is one tree you want to avoid -- unless there's something about the nickname "Little Apple of Death" that appeals to you. At first glance, the Manchineel tree is quite beautiful, with lush green ...