A gall is an abnormal growth or swelling of a plant caused by hormones released from insects, mites, bacteria, or nematodes. They can appear on any part of the plant with vast variation in morphology, ...

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 to ...

1. Neotropical insect galls : status of knowledge and perspectives / G. Wilson Fernandes, Marcel S. Coelho, and Jean Carlos Santos -- 2. Developmental anatomy of galls in the Neotropics : arthropods ...

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 ...

Insect-induced galls represent a fascinating mode of plant-insect interaction where specialised insects manipulate host plant tissues to form complex structures that provide both shelter and nutrients ...

Add Yahoo as a preferred source to see more of our stories on Google. Bootanomyia dorsalis is native to Europe, but has been found in multiple locations across North America. Native to Europe, B.

Woolly oak gall Goldenrod ball gall and bunch gall on same plant. Ruth Smith photo. Oak apple gall. Ruth Smith photo. A friend sent me a text message recently in which she asked, “Any idea what these ...

Don’t jump to the conclusion that those mysterious marks are evidence of disease. They may be leaf mines or galls — and that’s a good thing. 13 Photos View Slide Show › By Margaret Roach During the ...

Your description suggests your shrub has galls. Insect and mite galls are common on trees and shrubs throughout the Chicago area and generally are nothing to be concerned about. Leaf galls rarely ...