Brown leaf: Dark bands may remain visible on affected leaves during winter. Photo courtesy of Ontario Ministry of Natural Resources Forestry. (L); Withered leaves: Thick bands of leaf tissue may turn ...

A research team has uncovered a hidden layer of early growth control in mung bean by identifying a large set of previously ...

A scanning electron microscope reveals nematodes (highlighted in green) inside the spongy mesophyll of a European beech (Fagus sylvatica) leaf infected with beech leaf disease (BLD). Eggs are marked ...

This sounds to me like your witch hazels have galls. Insect and mite galls are common on trees and shrubs throughout the Chicago area and are generally nothing to be concerned about. Leaf galls rarely ...