Tiphia popilliavora was introduced from Japan and established in the beetle infested area in 1921-23. The present mother colony at Riverton, New Jersey, was started at that time with approximately 50 females. Definite recovery was made in 1926 and at that time the species was found within an area of approximately four acres. This season, 1929, the colonies had increased covering an area of 3.5 square miles. Within this area, thousands of females and males were seen feeding on the flowers of wild carrot. In 1927 field collections of females were started, resulting in 11 subcolonies of 100 ♀ each. In 1928 a check showed that eight of these had become established. With this precedent some 33 colonies were put out in 1928. During 1929, Tiphia were very abundant in the mother colony center and it was determined to place as many colonies in the field as could be obtained, Seven collectors working during a 17 day collecting period were able to collect 10,100 females. These were placed in 101 colonies of 100 females each on the margins of the heavily infested beetle area. At the present time there are 134 colony centers established throughout the infested region. A small number of tests releasements have also been made in the areas infested with Phyllopertha orientalis on Long Island, New York, and New Haven, Connecticut.
Document Type: Research Article
Publication date: February 1, 1930
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Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.