Light infestations of aphids can be removed from foliage by using a forced water spray delivered under high pressure. Lady beetles are frequent predators of aphids and should be protected when found feeding on aphid colonies. Feeding causes curling and distortion of leaves. These aphids are responsible for the honeydew raining down on cars parked beneath elms. Most common during early and late summer.
Control is difficult due to spray coverage problems.
They begin feeding in spring when new leaves appear, moving to new foliage all season. Select and plant resistant cultivars such as Emerald Mound, Clavey's dwarf, Miniglobe, Sakhalin, Freedom, Honeyrose and some of the Arnold Red. There are many insects which can be described by these common names. The plant bugs and leafhoppers are all very active insects which move quickly when disturbed. The young nymphs move by walking rapidly or jumping short distances.