Abstract
Integrated pest management systems that achieve economic control of the European red mite, Panonychus ulmi (Koch), and the twospotted spider mite, Tetranychus urticae Koch, by the predator Stethorus punctum (LeConte) while holding injury by insect pests below economic levels with applications of reduced amounts of insecticides are viable, successful management techniques practiced by Pennsylvania apple growers. Development of these management systems required much painstaking research as well as trial and error in actual orchard situations.
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