Family - (Eriophyidae) - Eriophyidae. Yellow to green blisters about 1/8 inch across appear on the undersides of leaves. Mites are tiny and difficult to see without a magnifying glass. … Order - Prostigmata Mites - Prostigmata. Other pest mites cause distorted growth of leaves, shoots, buds, or fruit. In case of emergency Call your poison control center: 1-800-222-1222 If the patient has collapsed or is not breathing: call 9-1-1 Damage on leaves is caused by mites feeding inside the leaf tissues, resulting in the formation of pale green to reddish blistered areas on the leaf. Species - Pearleaf Blister Mite - Eriophyes pyri Problem Info . See: Pear-Eriophyid mite. The body is sausage-shaped. This species causes brownish blisters that appear on the undersides of leaves and fruit. Pearleaf blister mite damage Identification tip:Leaf blisters, 1/8- to 1/4-inch across, first red and later blacken. Later in the summer these blistered areas will turn brown to black as the leaf tissue dies. https://www.canr.msu.edu/ipm/diseases/pearleaf_blister_mite What are Blister Mites? European red mite adult Identification tip: Dark red with white spots at the base of 6 to 8 hairs on the back. This species is part of a complex of related species, which has confused accounts of life history. Pearleaf blister mite - If damage was evident on fruit last year, apply a dormant spray of lime-sulphur or a wettable sulphur (see pear rust mite above) Pesticide resistance management - It is important to alternate products from different chemical classes or with different modes of action to avoid the development of resistance. European red mite damage Pearleaf blister mites are tiny, white to yellowish eriophyid mites that feed on leaves and fruit. The bodies of these eriophyids are elongate and wormlike. Spider mites cause stippling on leaves. Phylum - Spiders, Scorpions, Mites - Chelicerata. The most common types of blister mite pests are pearleaf blister mite and appleleaf blister mite. Pearleaf Blister Mite (Eriophyes pyri) Blister mite are a microscopic pest that attack pears trees and occasionally apple trees. Pearleaf blister mite adults are white to light red and extremely small (1/100 inch). Flower buds are deformed and may not set fruit. Mites in the groups listed below may damage fruit trees, vines, berries, vegetables, and ornamental plants. Rust mites can be divided into two ecological groups: the “free-living rust mites” (e.g., apple rust mite, pear rust mite, and prunus rust mite), and the gall-forming mites (e.g., pearleaf and appleleaf blister mite). Pearleaf Blister Mite. Pearleaf Blister Mite Eriophyes pyri (Pagenstecher) also known as pear bud mite, and also by the synonym Phytoptus pyri Pagenstecher, is most often seen in unsprayed trees. Nymphs resemble adults, but are smaller. Blisters may nearly cover the leaf. 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