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Chemical treatments are simply not sustainable. Until now, conventional methods of controlling the spread of HWA have included physically removing infested trees, planting HWA resistant Hemlock species, establishing state-wide quarantines, and applying chemical pesticides.  Each of these methods has not prevented the spread of HWA. HWA continues its invasion. Pesticides Are Not Enough Pesticides kill HWA in the short-term, but …

Hemlock Forests are in trouble. Eastern Hemlocks are under attack by a tiny invasive pest that destroys a tree in as little as 3-5 years, an entire forest in as little as 6-10. The Hemlock Woolly Adelgid (HWA) is the culprit. US Forest Service Photo Native to Japan, HWA was first discovered in Richmond VA in 1951 but is now established in Minnesota, Wisconsin, Michigan and every …

“HWA is capable of explosive rates of population increase” – Dr. Carole Cheah HWA is dangerously communicable.  It spreads from tree to tree, property to property, forest to forest and beyond. The woolly egg sacks open releasing hundreds and thousands of crawlers that fall like sand and blow in the wind, are carried by birds and drop onto other animals, …