Have you ever noticed the bulbs that form on the stems of goldenrod? Believe it or not, those bulbs house the larvae of an insect called the goldenrod gall fly. This fly is completely dependent on the ...

Maples commonly have galls form on the leaves of the trees from aphids and mites as well as on the bark. Ash trees will potentially form galls on the flower Hackberry nipple gall which forms on the ...

Insect galls are abnormal growths on plants or trees, caused by insects as a result of their feeding or egg-laying activities. The growth of galls starts with physical damage done to the plant as ...

Galls are abnormal growths and can be caused by a variety of different organisms, including insects and mites, and ...

There are several different kinds of insects that form galls, and each species of gall-forming insect produces its own unique gall. The gall serves to protect the young, developing larva from ...

Mites, nematodes, bacteria, fungi or viruses can initiate gall formation, but insects are mostly to blame. When a female insect lays an egg inside plant tissue and the larva emerges from that egg ...

Galls form when certain wasps, including species like Kokkocynips decidua and Kokkocynips rileyi, ... The insects carry the galls back to their nests, just as they would seeds.

Adult gall-making insects and mites are the only life-cycle stages outside the gall, so contact insecticides do not work well either. Most gall makers are wasps that are difficult to control even ...

Then we looked at leaf galls, which are parts of the leaf that critters have moved into. The galls expanded, and in this case, changed color to make room for all the creepy crawlies. “The gall-forming ...

A student plopped a leaf on my desk, pointed to several green lumps on its underside, and asked, “What are those green growths?” It was a stump-the-professor moment and in this case, I was, indeed, ...

The Plant Doctor Tom MacCubbin shares advice about tree galls, anise plants, gardenias, soybeans and lawn aeration. Skip to content. All Sections. Subscribe Now. 70°F. Friday, April 25th 2025 ...