Residues on Ryegrass Following Preplant or Post emergence Applications of Four Insecticides for Mole Cricket Control1

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Abstract:

Ryegrass was treated with chlordane, diazinon, Dyfonate® (O-ethyl S-phenyl ethylphosphonodithioate),and trichlorfonin bait and granular formulations. Pesticides were applied as a preplant treatment disked into the soil or as a single application to the grass 7 weeks after planting. Chlordane residues on ryegrass after a single foliar application of 0.5 nd 3.0 Ib per acre followed by 21 days of weathering were 2.1and 3.2 ppm, respectively. Preplant application of 3.0 Ib per acre of chlordane resulted in grass residues below 0.3 ppm throughout the sampling period. Following a 2.0-Ib-per-acre foliar application of 14% diazinon granules, residues decreased from 15.3 to 0.3 ppm during the 21-day weathering period. Diazinon residues of less than 0.1 ppm were detected on grass samples taken 50 days after a 2.0-Ib-per-acre preplant application to the soil. Dyfonate residues decreased from 16.8 to 0.5 ppm. during the 21-day period after a 2.0-Ib-per-acre foliar treatment. Under the same conditions, residues of Dyfonate oxygen analogue were found to be less than 0.2 ppm. after a 2.0-Ib-per-acre preplant application to the soil, residues of Dyfonate or its oxygen analogue were insignificant. Trichlorfon residues decreased from 37.5 to 0.1 pm during the 21-day weathering period after a 1.0-Ib-per-acre foliar application.

Document Type: Research Article

Publication date: April 1, 1972

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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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