Fallen sweet and fermenting fruits and vegetables attract many insects, especially bees, wasps, and flies. All can be nuisances, but bees and wasps have the added feature of a stinger. Attracting large numbers can lead to painful and sometimes life-threating encounters. Pick up and discard these attractants to keep pest numbers down.
Insect diets may shift in fall. For example, the food preference of yellowjackets moves from increasingly rare caterpillars and other insects to sweet liquids. Yellowjackets can remember odors of high value food sources and use them when searching for productive sites. Nest mates can use odors they are exposed to from successful scavengers in their colony as inducement to find similar sites on their own searches.
By Lee Townsend, Extension Entomologist