Hemlock Wooly Adelgid - Knowledgebase Question

Coopersburg, PA
Question by witoslawski
April 9, 1999
How do you Stop the Hemlock Wooly Adelgid? I learned what it's called by the Keystone Tree experts.

Answer from NGA
April 9, 1999


One possible treatment is the use of horticultural oil but the timing is critical in order for it to be effective. For a definite identification of the pest and the most up to date control measures recommended in your area, contact your local County Extension at 391-9840. Do this soon because this pest can kill a tree in just one season.

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