The Value to Uninfested States of Gypsy Moth Control and Extermination

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Abstract
The progress of the Federal gypsy moth work is traced since its inception and the results relative to the prevention of general spread of this insect are indicated. This includes the extermination of the insect in a territory of over 400 sq. mi. in New Jersey, maintenance of a barrier zone in western New England and eastern New York from Long Island Sound to Canada, which has protected other sections of the U. S. from infestation for 16 yrs., and substantial progress in reducing the infested area in northeastern Pennsylvania. Unprecedented wind spread of the insect into the barrier zone since 1938 has resulted from egg clusters being spread by the hurricane during the fall of that yr., and from particularly favorable conditions for the spread of small caterpillars the following spring. Recent scouting indicates many scattered points of infestation in the zone and the need for an immediate unusual effort to prevent rapid increase and westward spread of the pest.

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