Oaks are the most susceptible having the most species of gall-forming insects and mites being able to take advantage of them. Oak galls may form on the branches or the leaves Maples commonly have ...

Some of the most common galls form on oak trees. Of the 2,000 insect species that stimulate gall formation, at least 800 of them use oaks as their host. The photo I received (and is pictured here ...

systemic insecticides that are transported inside the plant are not very effective in killing the gall-forming insects while they are feeding. Also, since the gall tissue is different from the ...

Growths on plants formed by parasitic weevils help their offspring hunker down on a Brazilian savanna and outlast the flames.

Answer. You have spotted the handy work of quite small insects or mites. Oaks, especially the live oaks, seem to be susceptible to a number of gall-forming insects that produce swollen tree ...

Gall makers include insects, mites, bacterium, fungus and nematodes, but most are caused by mites and insects. The galls are formed when the female insect injects a chemical into the plant along ...

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 ...

The galls expanded, and in this case, changed color to make room for all the creepy crawlies. “The gall-forming insects are really interesting because they have a symbiotic relationship with the plant ...

Mr. Eiseman is also a keen observer of the architects behind galls, those abnormal growths that can take the shape of Ping-Pong balls when they form at leaf ... just some insect — often an ...