J. R. Coppedge
United States Department of Agriculture
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Archives of Environmental Contamination and Toxicology | 1977
J. R. Coppedge; D. L. Bull; R. L. Ridgway
When the rate of movement and the persistence of aldicarb in 4 types of soils were investigated in laboratory and field studies some leaching was detected in coarse sand; however, leaching was quite limited in clay loam and muck soils. These data indicated that aldicarb degraded quite rapidly in the selected soils and most of the applied radioactivity volatilized from these soil columns as14CO2. The evolution of14CO2 from the treated soil suggested severe degradation of the aldicarb molecule and consequently provided indirect evidence against the accumulation of significant quantities of toxic metabolites in the soil types evaluated. Under field conditions this toxicant appeared to have a half-life of about 7 days in loam soil.
Transactions of the ASABE | 1979
J. L. Goodenough; J. R. Coppedge; A. B. Broce; H. Del Var Petersen; A. Higgins
ABSTRACT A system was developed to bait and distribute Screw-worm Adult Suppression System (SWASS) units as a suppressant of a native population of screwworms, Cochliomyia hominivorax (Coquerel). The system reported herein was used to distribute 3000 to 8000 units weekly across the 460-km2 island of Curacao, Netherlands Antilles. Each SWASS unit contained chemical attractant, viscous feeding bait, and insecticide inside a 7.6 x 5.1-cm-dia paper cylinder. The bait was mechanically applied with a machine we developed. Use of this machine resulted in a saving of about
Transactions of the ASABE | 1981
J. L. Goodenough; J. R. Coppedge; H. E. Brown; J. W. Snow; F. H. Tannahill
30/1000 units, timely completion of the program, and better utilization of labor. Units ready for aerial distribution were placed into sealed canisters to provide adequate protection to the operator, pilot, and aircraft from fumes of the attractant chemical. Canisters fit onto a variable speed machine for dispensing the units across the island. Operation of this program for 10 wk resulted in from 67 to 85 percent reduction in the native population of screwworms.
Environmental Entomology | 1977
J. R. Coppedge; Elmer H. Ahrens; J. L. Goodenough; Frank S. Guillot; J. Wendell Snow
ABSTRACT A system was developed for transporting, metering, and distributing a pelletized formulation of the Screwworm Adult Suppression System (a combination of bait and toxicant) from aircraft as a suppressant of a na-tive population of screwworm, Cochliomyia hominivorax (Coquerel). Two trials of 3 applications each at rates of 0.18 kg/km2 of pellets weighing about 3 g each were made across a 500 km2 area in the Davis mountains of western Texas (Jeff Davis County) during September and October, 1978. Results indicate reductions of 77 percent and 91 percent in the native female screwworm captures in the treated area as compared to a control area.
Journal of Economic Entomology | 1977
Alberto B. Broce; J. L. Goodenough; J. R. Coppedge
Bulletin of the Entomological Society of America | 1982
J. Wendell Snow; J. R. Coppedge; Alberto B. Broce; J. L. Goodenough; Harold E. Brown
Annals of The Entomological Society of America | 1977
F. S. Guillot; J. R. Coppedge; J. L. Goodenough; T. S. Adam; Elmer H. Ahrens
Journal of Economic Entomology | 1978
J. R. Coppedge; J. L. Goodenough; A. B. Broce; F. H. Tannahill; J. W. Snow; M. M. Crystal; H. Del Var Petersen
Journal of Economic Entomology | 1978
J. R. Coppedge; Alberto B. Broce; F. H. Tannahill; J. L. Goodenough; W. Snow; M. M. Crystal
Environmental Entomology | 1977
R. E. Kinzer; C. B. Cowan; R. L. Ridgway; J. W. Davis; J. R. Coppedge; S. L. Jones