The adults, males and females, of the onion maggot, Hytemyia antiqua Meig. and the seed corn maggot, Hytemyia cilicrura Rond. are attracted in large numbers to sweetened baits containing small amounts (1-2 drops to 5 cc.) of several alcohols, particularly allyl alcohol, iso propyl alcohol, ethyl alcohol and butylic alcohol. Allyl alcohol and iso propyl alcohol were the most attractive. These alcohols mixed with honey and water as a medium were most attractive. Sweetened media, particularly molasses, honey or brown sugar, containing yeasts (made with wet yeast, "Fleischmans Yeast" or dry yeast, "Magic Yeast" or "Yeast Foam") also proved to be highly attractive to both species of flies. The baits containing alcohols lost their attractiveness as soon' as the alcohol evaporated. This usually occurred 24 to 48 hours after they were placed in the fie1el. Baits containing yeasts remained attractive 14 to 21 days or longer provided they were not allowed to become dry'. Sodium arsenite added to baits containing alcohols in amounts as large as K ounce to 1 quart of bait did not bring about a perceptible change in the attractiveness of the bait while this amount of sodium arsenite added to yeast baits apparently killed the yeast organism for there was a marked diminution in the attractiveness of the bait, particularly with yeast baits made from dry yeast. In a number of experiments, where .sodium arsenite was used, at the rate of K ounce to 5 quarts of the bait, especially where wet yeast was employed, the attractiveness of the bait was not materially reduced. Further experiments may show that very small amounts of sodium arsenite (sufficient to kill the flies) may be added to sweetened yeast baits without dimininishing the attractiveness of the bait.
Document Type: Research Article
Publication date: February 1, 1924
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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.