Comparison of Permethrin Applied as a Foliar Spray and Root Soak for Cabbage Looper Control on Greenhouse Chrysanthemum Cuttings and Celery Transplants

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Abstract:

A method of soaking chrysanthemum cuttings and celery transplants in permethrin solutions was evaluated to determine efficacy and foliar residues. Plants were soaked in solutions containing 625–2500 ppm permethrin ± a surfactant, Hyamine 3500® This method was compared with a standard foliar application of the same permethrin concentrations + the surfactant. Root soaking in permethrin + surfactant resulted in higher residues but also caused moderate-severe phytotoxicity. No significant growth reduction occurred in permethrin-only root soak or any foliar spray treatments. Root soak treatments of permethrin were efficaceous vs. Trichoplusiani (Hübner) on chrysanthemum but not significantly (P = 0.05) better than foliar sprays. T. ni mortality was quite variable on celery transplants soaked in permethrin solutions, probably due to the root system being surrounded by soil.

Because of the excessive rates necessary to provide adequate T. ni control in root soak treatments, we conclude that the method is not practical for use on a commercial scale.

Document Type: Research Article

Publication date: June 1, 1980

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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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