What effect does leaf gall have on leaves?

Leaf gall primarily causes swelling as it develops on the leaves. This phenomenon occurs when certain pests, typically gall-making insects or some plant diseases, induce abnormal growth in plant tissues. The affected cells become enlarged, resulting in distinct deformities that can vary in size, shape, and color. Swelling occurs as the plant's natural defense and growth mechanisms respond to the irritants introduced by the pests or pathogens.

Fading color, wilting, or burning tips are symptoms related to other stress factors such as drought, nutrient deficiencies, or chemical damage. While they may affect a plant's overall health, they do not specifically represent the changes caused by leaf gall.