Galls are abnormal growths on a part of the plant. They can be caused by bacteria, insects, mites and fungi. They can be on any part of a plant and are the overgrowth of plant tissue in response ...

Crown gall lies in wait until emerging in damaged vines, but new research aims to give growers a better chance of detection ...

Oak galls are popping up everywhere this fall! They're the tiny, fuzzy yellow or brown balls on oak leaves and branches. You could spot one or two, then dozens around the same tree. Oak galls are ...

Students observe galls on willow leaves, and begin their investigations in teams by collecting data to test the instructor-posed hypothesis that the number of galls per leaf varies among willow trees.