Another pest has been added to the list of exotic insects that dishearten California farmers. The brown marmorated stink bug, a destructive native of Asia, has been seen this spring in 33 states, including California, Oregon and Washington, according to the San Francisco Chronicle.

"All that we do know for certain is that a tremendously large population went into overwintering in fall 2010. So, if they survived, there could be a very large population emerging in the spring," the story quoted Tracy Leskey, a research entomologist at the U.S. Agriculture Department's Appalachian Fruit Research Station in Kearneysville,...