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Hemlock woolly adlegid (HWA), the invasive forest insect first detected in the Lake George watershed in 2020, continues to spread and pose a threat to water quality and wildlife habitat. To help mitigate the impacts of HWA, the LGLC continues to manage HWA on infested preserves through chemical control, in conjunction with the release of biological controls (biocontrols) - predatory insects that specifically feed on HWA.
This spring the LGLC will complete a cycle of chemical treatment at both the 15-acre East Brook Preserve in Lake George, and the 60-acre Clark Hollow Bay Preserve in Putnam.
The goal of using a chemical and biocontrol two-prong approach is to provide chemical protection to the trees while the biocontrols have time to build numbers. As the biological controls get established, they can reduce the population of HWA on a landscape scale and create a glimmer of hope for the future of hemlock forests.
LGLC staff and our partners in the NYS Hemlock Initiative and Lake George Hemlock Coalition are also looking for evidence of mortality of HWA after this year's cold winter. This information will help to further research and guide management plans as we continue our efforts to protect Lake George from this invasive pest.
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