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Thimet Residues in Small Grains Grown in Treated Soil1

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A formulation of 40%Thimet was mixed with 4-16-8 fertilizer and used to treat the soil or 8 by 8 foot plots at rates of 0, 1, 2 and 4 pounds of Thimet per acre where small grains were subsequently grown. The objectives were: (1) to see if these treatments would reduce the incidence of "blue dwarf" disease of oats by killing a possible arthropod vector, and (2) to study the Thimet residue toxins, if any, present in oat, wheat and barley plants at different intervals after planting. The disease readings were made by visual inspection after the oats had headed; the chemical analyses were made by the method of Hensel et at. (1954) as modified by Curry (1956).

The following results were obtained: (1) Thimet residue toxins were found as early as 26 days and as late as 47 days after planting but none was recorded in 36 analyses made on plants or grain 68 days or more after planting; (2) the incidence of blue dwarf disease on oats was not substantially reduced by the Thimet treatments under the conditions of this experiment; (3) the Thimet-fertilizer mixtures did not cause any apparent phytotoxicity to the three crops tested.

Document Type: Research Article

Publication date: October 1, 1958

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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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