Achieving Biological Control of European Red Mite in Northeast Apples: An Implementation Guide for Growers
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European red mites (ERM), Panonychus ulmi, feed on leaves of apple trees and thereby interfere with photosynthesis and production of carbohydrates. At high levels, ERM damage to apple leaves reduces fruit yield and quality. As a general rule, keeping ERM numbers below 2.5 per leaf before July, below 5 per leaf during July, and below 7.5 per leaf in August will prevent economic losses from this pest.
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NYS IPM Type: Fruits IPM Fact Sheet
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1998
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New York State IPM Program
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Agricultural IPM; Fruits; Tree Fruit; Apples; Biocontrol
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Cornell Cooperative Extension Tree Fruit Crops IPM Publication No. 215
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fact sheet