Adelgid tree pests

Adelgid tree pests

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Credit: ALAN & LINDA DETRICK/SCIENCE PHOTO LIBRARY

Caption: Woolly adelgids. Several woolly adelgids (Adelges tsugae, white) on hemlock tree (Tsuga sp.) twigs. Woolly adelgids are insects which eat the sap from the base of the tree's leaves, causing them to fall off. This eventually kills the tree. The white fluff which gives them their name is a secretion which protects their eggs. The insects originated in Asia, but arrived in North America in the middle of the 20th century. Hemlock populations have been reduced by the pest, as it has no natural predators in North America. It can be controlled by the use of some insecticides.

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Keywords: adelges tsugae, adelgid infestation, adelgids, botany, disease, diseases, hemlock, leaf, leaves, nature, pathogens, pathology, pest pests, plant, plant pest, tsuga sp., woolly, wooly adelgid, wooly adelgids

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