Spruce Gall

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Spruce Galls are formed by small insects who feed on the vegetation of Spruce trees. There are two types of insects which cause spruce galls to form, the Cooley Spruce Gall Adelge, and the Eastern Spruce Gall Adelge/ These two families of insects cause harmful galls to form at the tips of spruce stems. These galls can be 1-2 inches long and almost an inch in diameter when fully developed. They are dangerous as these galls are a form of infestation on the tree and begin to kill the vegetation of the tree.

The disease starts at the point of infection and eventually can spread throughout the tree if not controlled. It is rare that one gall will be able to destroy a whole Spruce tree as these trees are very large in size; however, much damage can be done if multiple galls appear at different stems. These galls slow the growth of the tree and cause the plants on the tree to lose their green pigment, turn yellow or brown. These galls, which are green when first formed, also eventually turn brown. Now, these pests are not a major problem in the Spring, Fall, or Winter; however, in the heat of the summer is when the majority of the damage occurs.
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To protect your lawn from these two pests that cause Spruce Galls, the best thing to do again is to buy a pesticide specifically created to control population of these bugs and apply this pesticide to potential areas of infestation so that these bugs are not able to infect your trees.

Spruce Galls can be very costly as they can potentially damage much of your Spruce trees. Hence, the best way to control them is to eliminate the source buy purchasing a pesticide that will exterminate the pests which cause them to form.