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Experiments with Repellents Against the Corn Root-Aphis

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In consequence of reports from farmers of beneficial results of the use of kerosene on seed-corn, a strip through a large field was planted, in 1905, with seed which had been soaked in kerosene, and as a result a considerable percentage of the seed was damaged, though the plants were protected for some weeks against injury by the corn root-aphis. On the supposition that the latter effect was due to the odor, experiments were made during the winter of 1905-06 with carbolic acid, oil of lemon, formalin, minimum quantities of kerosene, and a variety of other volatile oils and odoriferous substances, from which the four above mentioned were selected for trial in the field. The kerosene was used at the rate of a teaspoonful to a gallon of earn, thoroughly stirred in just before planting, the oil of lemon as a 10% solution in alcohol, and the carbolic acid and the formalin as 3% solutions in water. Three ounces each to a gallon of corn were used of the oil of lemon mixture and the carbolic acid solution, and six ounces to the gallon of the solution of formalin.

Strips of twelve to twenty-four rows each and eighty rods in length were planted with treated seed, intervening strips being left as sulted in noticeable injury to the seed, showing that this substance as sold is of very unequal quality and apparently of unlike composition.

Document Type: Research Article

Publication date: April 1, 1908

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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.
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