Comparison of Spray Nozzles for Ground Applications for Control of Colton Insects and Spider Mites

Authors: Hopkins, A. R.; Taft, H. M.; James, W.

Source: Journal of Economic Entomology, Volume 72, Number 2, April 1979 , pp. 180-183(4)

Publisher: Entomological Society of America

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Abstract:

Fenvalerate applied at a rate of 0.11 kg AI/ha to cotton gave equal control of the boll weevil, Anthonomus grandis grandis Boheman, Heliothis spp., beet armyworm, Spodoptera exigua (Hübner), fall armyworm, S. frugiperda (J. E. Smith), and cabbage looper, Trichoplusia ni (Hübner), whether the nozzles were the conventional type (Conejet TX6), the 8001 low-pressure fan nozzle, or Raindrop®, 33974-(3-23). Control of the carmine spider mite, Tetranychus cinnabarinus (Boisduval), with monocrotophos and American Cyanamid AC-85,258 (nitrilacarb 1:1 complex with zinc chloride) applied with Raindrop 33974 (5-23) nozzles was statistically equal to that obtained with conventional nozzles. AC-85,258 was phytotoxic when applied with Raindrop 33974 (5-23) nozzles. An LD50 dose for the boll weevil was found at various distances downwind in relation to the type of spray nozzle used and height above plants. The only significant difference between the conventional and Raindrop nozzle 33974 (3-23) occurred when these were raised to 107 cm above the cotton plants.

Document Type: Research Article

Publication date: April 1, 1979

More about this publication?
  • 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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