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Carrot Rust Fly: Chemical Control of First Generation Larvae in Organic Soil in Ontario

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Seven insecticides were evaluated for control of the 1st generation of Psila rosae (F.) on the organic soil of the Holland Marsh, Bradford, Ontario. Granular formulations of carbofuran at 2.2 kg AI/ha (88.6 mg/m row) and chlorfenvinphos at 1.1 or 2.2 kg AI/ha, applied to the seed furrow at planting time, were the most effective; carbofuran 4.8F, applied as a drench at seeding or 20 days later, was less effective, and at 42 days was ineffective. Diazinon granular applied in the furrow at 1.1 or 2.2 kg AI/ha did not provide economic control and reduced the emergence from untreated seed. This phytotoxic effect was less evident when seed was pretreated with captan by the supplier, and an additional seed treatment with thiram 75% W, 31 g/kg, improved seedling emergence from both captan-treated and untreated seed. Granular formulations of dimethoate, pirimiphosethyl, and BAS 2353-1 (3,5-diethyl-phenyl-N-methylcarbamate), all at 2.2 kg AI/ha, were ineffective. Carbofuran granular also provided effective control of the carrot weevil, Listronotus oregonensis (LeConte).

Document Type: Research Article

Publication date: April 1, 1976

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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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