The shape, size, and color are extremely variable, but appearance of the galls is unique to the insect causing them. Most gall-making insects and mites are not harmful to the host plant. Control attempts are rarely justified and usually are unsuccessful because the gall protects the insect within it. Some of the galls are quite interesting, adding a touch of uniqueness to plants. Caused by jumping plant louse.
Galls are light green and nipple-shaped.
Caused by jumping plant louse. Small, round, multi-celled growths of the bud. Caused by mite. Galls are bladderlike, red, and found on the top side of leaves. Caused by aphid.