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Hemlock Rust Mite

Hemlock rust mite is an Eriophyid mite that feeds on hemlock needles causing foliar symptoms that are often mistaken for a nutrient deficiency, air pollution damage or winter injury. Eriopyhid mites are smaller than most spider mites, wedge-shaped, slow moving arthropods that are not as easily seen with the naked eye. Eriophyid mites are widely distributed and attack a range of plant species, most notably the conifers.

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Featured Tip

Soil lacking in iron adversely impacts tree health. A common symptom is yellowing between the veins of leaves.

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