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The spread of the alfalfa weevil through the medium of alfalfa hay and meal has been studied throughout a period of thirteen months. The conclusion is drawn that the large number of weevils present in the growing crop diminishes with each step in the handling of the hay so that the accumulation on the premises of an alfalfa meal mill, even at the end of the summer, is negligible, and the only source of contamination in the mills, generally speaking, is the hay which is being ground. In certain mills whose product was accepted by quarantine officers for interstate shipment, it was possible for weevils to pass through the machine alive, but this condition was easily remedied, so that meal could be delivered uninfested at the door of the freight car. Cars which have been used for infested alfalfa hay, however, remain infested for an indefinite time thereafter and are used more frequently for other commodities than for alfalfa meal. These cars move rapidly and in large numbers into every part of the United States and it is they, and not the alfalfa meal, which constitute the real danger.
Document Type: Research Article
Publication date: June 1, 1929
More about this publication?
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.