They are sedentary while feeding and secrete small, white granules that resemble sugar. For best control, dust the foliage, especially the undersides, with sulfur. See fact sheet 5.540, Potato and Tomato Psyllids . The adults chew small holes or pits in leaves. Wounded tissue may be more susceptible to diseases such as early blight.
Most plants outgrow flea beetle damage.
See 5.592, Flea Beetles . A green to reddish horn protrudes from the hind end. They are voracious feeders, stripping leaves from stems and even eating unripe fruit. Pick them off by hand. Symptoms become prevalent during the hotter months.