With a population explosion going on in the flowerbeds, what is a gardener to do? UW-Madison entomologist PJ Liesch says gardeners have several options in combating the hungry horde.
“If the population of aphids is not harming the plants or competing with the monarchs, you can just tolerate them. However, if it’s getting out of hand, blast them off with a jet of water (which causes the aphid’s mouthpiece to break off and eventually starve), or you can squish them and wipe them off the plant,” he said.