- Spring: Orangey-brown eggs
- Early summer: Tiny reddish-brown crawling insects. They almost resemble pepper sprinkled on the stems.
- Summer: The young insects spin a little white nest, made of a waxy, woolly-looking substance. The small white nodules are visible at the base of the needles along the stems. It is the easiest way to identify the woolly adelgid.
- Fall: During the summer, the woolly adelgid goes dormant. They come back out and start feeding in the fall and over the winter.
Imidacloprid moves slowly, taking at least a year to reach the top of a large tree. However, one application will protect the tree for at least four years.
Dinotefuran moves through hemlock trees more quickly, making it an ideal choice for large, old trees or those showing decline due to infestation. Dinotefuran protects trees for one to two years.
Granular: Remove debris from the ground and then spread the correct amount of granules around the tree’s base as close to the trunk as possible. You’ll have to protect people, pets, and wildlife from the granules using a watering can or sprinkler to help the insecticide soak into the soil. You must also cover the treated area with a thin layer of mulch.