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Common white edible beans are protected from later attack by the common bean Weevil (Bruchus obtectus) when mixed in proper proportions With ground burned lime (CaO), hydrated lime Ca (OH)2 calcium chloride CaCl2, calcium sulfate CaSO4, dolomite, Highland Clay, Bond D Clay and Milltown Ball Clay No. 9. The protection which is afforded by these materials is most marked in the case of Milltown Ball Clay No. 9, and seems not to be connected with atmospheric moisture or chemical state of the dust materials. The protective ability of these materials appears to bc correlated with the degree to which they exhibit a colloidal character-the more colloidal the more effective, the less collodial the less effective. This physical character seems to operate through preventing the larva of the bean weevil from obtaining sufficient foothold upon the surface of the bean seed to drill its way into the bean. Milltown Ball Clay No. 9, which is the most colloidal of all the dust materials worked with, appears to afford protection to wheat and shelled eorn from later attack by the angoumois grain moth(Sitotroga cerealella). This clay apparently also has an insect reducing power when not in direct contact with the immature stages of the insects themselves. This insect infestation reducing power appears both in the case of the bean weevil and the angoumois grain moth.
Document Type: Research Article
Publication date: April 1, 1924
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.