Effects of Simulated Rain and Dew on the Toxicity of Certain Ultra-Low-Volume Insecticidal Spray Formulations1

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The effects of simulated rain and dew on the toxicity of ULV sprays of certain insecticide formulations to the boll worm, Heliothis zea (Boddie), and boll weevil, Ant/lOno- mus grandis Boheman, were investigated. Formulations compared were AzodrinĀ® (3-hydroxy-N-methyl-cis-crotonamide dimethyl phosphate, 5 lb/gal water miscible) , Azodrin (4.8 lb/gal low-volume concentrate), azinphosmethyl (2 lb/gal EC) , azinphosmethyl (2 lb/gal ULV) , methyl parathion (80% T)-methyl parathion (4 Ib/gal EC) , malathion (965% T), and StrobaneĀ® (terpene polychlorinates, 65% chlorine) + methyl parathion (4 lb + 4 lb/gal EC) . Results indicate that ULV sprays of water-miscible formulations were less toxic to the boll worm and boll weevil than immiscible formulations when subjected to rain and dew. Certain additives showed promise for enhancing the resistance to rain of an Azodrin formulation.

Document Type: Research Article

Publication date: February 1, 1969

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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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