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, ...

‘I have some weird, seemingly hollow, green, round balls falling from my oak tree. What in the world are these things?” — S.Y. You are describing an interesting growth that can occur on a variety of ...

Two ball or apple galls have formed on this goldenrod stem. The larva inside will stay there through the winter and complete their development in the spring, then emerge as small adult goldenrod gall ...

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 ...

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 ...

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 ...

Alias: Maple bladder gall mite. This insect is very rarely seen, but its effects are common among maple trees. It is a small mite that feeds on the underside of maple leaves, and develops a bright red ...

Other oak species are also apparently appealing to gall-making insects (and arachnids like mites), and there’s no shortage of types of gall, some of which you may have heard called “oak apples.” Iron ...

This past winter was above-average in temperature. Rarely, if at all, did we have any of those bone-chilling days or nights. As a result of the mild winter, people were asking if we would see more ...

Indiana trees are now suspected to be home to the oak gall mite, a parasite on a parasite. The oak gall mite, formally known as Pyemotes herfsi, is a nuisance in Nebraska, Kansas and Colorado and has ...

Answer: If you have an ash tree, you’ve probably seen the evidence of these ash flowergall mites (Eriophyes fraxiniflora). In case you’ve never noticed them before, the ash flowergall mites (aka ...