Pesticide Safety Handbook

Tree & Shrub Applications:
Integrated Pest Management Applications (IPM)

Step 1 | Step 2 | Step 3 | Step 4 | Step 5 | Step 6 - See Application Chart

Step 3: This application is done in early May.

Hemlock Wooly Adelgids eggs are hatching into new crawlers. It is at this stage of their life cycle where these pests are most vulnerable to control. Adelgids prefer mature hemlocks. They are piercing, sucking insects which can be easily identified by their white, waxy coating. A heavy infestation can cause the death of a tree in 3-4 years. In addition to oil applications during dormancy a pest monitor will spray the crawlers of infested trees at this time.