Friday, April 13, 2007

Hemlock Woolly Adelgid - Treatment update

Recent research has shown the soil drenching method to control the Hemlock woolly adelgid is proving to be the most effective treatment option for homeowners. Soil drenching involves the mixing of imidacloprid with water and pouring the mixture around the base of the tree into a trench 2-3 inches deep, 1 ft. from the trunk. Follow the label regarding how much water to use. Take necessary precautions to prevent run off. Rake back any heavy leaf litter or mulch on top of the ground before making the application. Return the leaf litter or mulch after the application is made. This is not a recommended method for stream bank trees.

Imidacloprid can be purchased under trade names such as Bayer Advanced Tree & Shrub Insect Control®, Merit®, Imidipro®, Touchstone®, Zenith®, and Lesco®.

For more information contact your local Extension office.

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