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Sampling Second Generation Spotted Tentiform Leafminer: a Means to Reduce Overall Control Costs and Facilitate Biological Control of Mites in Apple Orchards

Author
Schmaedick, Mark; Nyrop, Jan
Abstract
Insecticides commonly used for STLM control (methomyl,
oxamyl, and pyrethroids such as esfenvalerate) are highly toxic to
predatory mites. Because they greatly reduce mite predator
numbers, applications of these insecticides to control STLM often
lead to outbreaks of European red mite (Panonychus ulmi) (4,7).
In a typical year, however, leafminer populations in most New
York orchards do not reach densities high enough to justify
insecticidal control. A sampling program that would enable growers
to determine the need for controlling STLM would reduce pest
control costs by eliminating the need for preventive treatments,
and minimizing disruption of naturally occurring biological control
of European red mite. This report describes such a sampling
program for second generation STLM.
Journal/Series
New York's Food and Life Sciences Bulletin 143
Date Issued
1993Publisher
New York State Agricultural Experiment Station
Subject
second generation spotted tentiform leafminer; biological control of mites in apple orchards
Type
periodical