Key Identification Features
- The galls have a distinct pineapple-like shape, and range in length from 0.
- They can be distinguished by their small size, their location at the base of budding twigs, and the characteristic of the host branch growing through and extending past the gall.
- The presence of HWA can be identified by its egg sacs, which look like small tufts of cotton clinging to the underside of hemlock branches.
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