This is a common pest on roses grown out of doors. During the latter part of May and in June, numerous tiny young of this insect may be found on the under side of the leaves, from which they suck the juices, producing whitish spots, and if abundant may cause the leaves to turn yellow and drop off. At first these insects cannot fly, though they can hop freely, but after they have become adult, disturbing the bush may start them flying in clouds. These adults are about an eighth of an inch long and pale yellow in color.

Thorough spraying of infested plants with kerosene emulsion or soap is quite effective as a treatment, provided that the spray be directed against the undersides of the leaves and be driven rather suddenly, hitting the insects before they have time to hop or fly away. If a strong stream of water can be driven at them through a garden hose, this may be sufficient without resorting to the insecticides.