When populations are high, the woolly masses coalesce into one large mass on the trunks. History Overwintering immature adelgids will begin feeding during the first days of warm weather, and secrete woolly tufts. Eggs hatch into crawlers, which can move to other parts of the tree or be blown to other trees. Crawlers either become winged or wingless. The wingless forms remain on the host and reproduce repeatedly.
Winged forms can disperse to new trees.
Five generations have been recorded as far north as the Lake States. Since permanent damage to trees is unlikely, little research has been carried out on control tactics. Application of insecticides is recommended for the trunks of transplanted large pine stock before the trunk is wrapped. Dormant oil, soap, and sevin are recommended compounds. Consult the Pest Management Guide for Horticultural and Forest Crops, Virginia Cooperative Extension Publication 456-017 for proper application methods and any additional compounds.