Galls are abnormal growths on the leaves and twigs of many plants. The oak trees in the Skiatook area have two kinds of galls, a leaf gall and a twig gall. Both are caused by tiny wasps. Galls ...

It looks like oak gall on pin oak leaves is back this spring By Dennis Patton. May 10, 2016 3 ... However, just because a twig is covered with galls does not mean it is dead.

Twig galls appear in the spring of the following year. Two or more years are required for the immature gall wasps to complete development in the twig galls. The galls provide shelter, protection ...

The gall also provides a source of food for the insect. ... Oak bullet galls are common twig galls on our native bur oaks. Bullet galls are hard, round, and pea-to-knuckle-size, ...

Stem and twig galls can be pruned if deemed to be practical and necessary. In short, this is a problem that is best ignored unless pruning is done to improve the appearance of the tree. Sawfly ...

These cones don’t hold any tree seeds, however. Instead, they harbor the “seeds” of a gall-midge called Rhabdophaga strobiloides. These are willow pine cone galls.

Two or more years are required for the immature gall wasps to complete development in the twig galls. The galls provide shelter, protection, and food for the immature wasps.

But adelgids focus their efforts low on the tree, and their presence and activity shunt the developmental trajectory of the new growth from cone to gall. The tiny crawlers get inside the gall and feed ...