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Gypsy Moth Biological Control

Since l992 the Minnesota Department of Agriculture has continued a biological control program by building up populations of gypsy moth parasites in other insect populations. This season there will be over l0,000 releases of the gypsy moth cocoon parasite, Pimpla disparis, in eastern Minnesota near the Wisconsin border. This parasite will be targeted for the cocoons of tent caterpillars, white-marked tussock moths and fall webworms. Several thousands of a second gypsy moth parasite, Ooencyrtus kuvanae, will be released close to areas suspected of having gypsy moths. Recovery efforts will be increased to see how widely both gypsy moth parasites have become established from previous releases.