My hemlock hedges have been infected by woolly adelgids, and I just applied this product to the some 20 trees involved, in hope of stopping the damage. The process to apply it was fairly easy, but its results won't be known for months, as the white cocoons do not fall off, even if the adelgids are killed. I give 4 stars here, reflecting the application process, but I can't rate the product efficiency until I can verify that the infestation has stopped. It better works, as it is very expensive !
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