Hemlock Rust Mite
Rust mites aren’t a problem every year. They tend to be more of a problem during long springs with mild weather. They can be a problem on white pines and hemlocks as well as Fraser fir.
Online Information
CTN 34: Rust Mites in Christmas Trees – fact sheet with photos and information on the life cycle, scouting, and treatment threshold
Focus on Scale Control – including miticide recommendations
Photo Gallery
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- Hemlock rust mites cause bronzing of the foliage which often shed prematurely
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- Drawing of an eriophyid mite. Drawing courtesy of Dr. James Baker, NCSU
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- Rust mites and mite eggs at the base of white pine needles