Ultralow-volume Mists of Chlorpyrifos from a Tractor-mounted Blower for Area Control of the Lone Star Tick (Acari: Ixodidae)

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A conventional tractor-mounted mist blower was modified for ultralow-volume (ULV) application of nonaqueous formulations of chlorpyrifos for area control of the lone star tick, Amblyomma americanum (L.), in wooded plots (0.20–0.36 hal and high-use recreational areas (0.98–5.10 ha) in Oklahoma during 1981 to 1983. The construction of the mist blower for ULV application is described. Mist deposits of a red fluorescent dye indicated that uniformity of coverage over 15-m swaths with the prototype ULV mist blower was equal to that obtained with another mist blower used for low-volume (LV) application of aqueous formulations. Field assays with a dose of 0.28 kg chlorpyrifos/ha showed that ULV mists (volumes of 0.39–1.17 liters/ha) were equal to LV mists (47 liters/hal in effectiveness against ticks. The overall levels of control of ticks with ULV mists were 85% (larvae), 94% (nymphs), 90% (adult males), and 86% (adult females) for posttreatment intervals of 1 to 6 weeks (nymphs and adults) and one day to 3 weeks (larvae). Relative densities of ticks were determined by a dry ice method (nymphs and adults) and a cloth drag method (larvae).

Document Type: Research Article

Publication date: October 1, 1984

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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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