Abstract
The foraging and tending behavior of the ant Dolichoderus taschenbergi (Mayr) was studied for 5 years in southwestern Pennsylvania. The ant used well-defined foraging trails and avidly collected honeydew from tuliptree scales, pine aphids, and less abundant sources. The ants increased the survival rate of tuliptree scales from 8.2 to 46.8%, probably by interfering with the activities of parasites and predators.

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