Step 1: Do you have hemlocks?

If YES, go to Step 2.
If NOT SURE, click the link to get help identifying your tree: Is it a hemlock?

Step 2: Is your hemlock infested by hemlock woolly adelgid (HWA)?

If YES, go to Step 3.
If NOT SURE, click the following link to get help identifying HWA and other common hemlock pests: HWA Identification Guide
If NO, do not treat for HWA. Why?

If your tree’s health is declining due to something other than HWA, then chemically treating they way you would for HWA may not help that problem and could make the real problem worse.  See the HWA Identification Guide for other possible pests and diseases that may be affecting your hemlock.  If you are unable to see HWA on your hemlock during the winter or you are unable to reach a living branch, you may need to consult a professional.  If you do not see HWA and your tree looks healthy then you can either treat prophylactically as a defense against HWA, as imidacloprid can last for multiple years, or you can monitor for the appearance of HWA and any decline in tree health.

Step 3: Assessing the severity of the situation

Click on the following link to determine whether your trees will respond to treatment: Hemlock Health Assessment Guide

Step 4: Location

The setting in which your trees are located may influence your treatment options. Please select from the following list to learn about location-specific considerations:

Step 5: Hemlock woolly adelgid treatment options

Click on the following links to learn about chemical treatment options
General HWA Treatment Info
Simple Soil Drench Instructions
Chemical Product Comparison Chart
Cost Sharing Options

Still have questions?

Call us at 828-252-4783 or email info@savehemlocksnc.org with your questions, and we’ll do our best to point you in the right direction.
Send us photos to help us better inform you. Here is a document on how to take useful photos: Photographing a Tree