Extension Bulletin

Many plants have distorted growths caused by insects during the spring. This box elder has Cecidomyid gall midges that cause the leaf curl. If you […]

We often see the velvet-like growth of eriophyid mite galls on silver maple and river birch.  Every once in a while we’ll see similar symptoms […]

Extension Bulletin

Extension Bulletin

An unusual gall on oaks is the “wool sower gall”. These galls can be several inches across and have a fuzzy, cottony texture. Many seed-like […]

Odd swellings on the twigs of spruce and certain other conifers can be galls associated with tiny aphid-like creatures known as adelgids.  In some cases, […]

Funny bumps on pear and plum leaves are caused by an Eriophyid mite called Pear Leaf Blister Mites. The injury may start as a reddish […]

Extension Bulletin

These galls appear on the leaves of swamp white oak. Leaves can be severely curled and will possess a round pod-like structure. Extension Bulletin