Achieving Biological Control of European Red Mite in Northeast Apples: An Implementation Guide for Growers
Breth, Deborah I.; Nyrop, Jan P.; Kovach, Joseph
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.
NYS IPM Type: Fruits IPM Fact Sheet
New York State IPM Program
Agricultural IPM; Fruits; Tree Fruit; Apples; Biocontrol
Previously Published As
Cornell Cooperative Extension Tree Fruit Crops IPM Publication No. 215