dod tactical herbicide sites - United States Department of Defense

(DNBP), pentachlorophenol (PCP), hexachloroacetone (HCA), and monosodiummethanearsonate (MSMA), pentachloro-pentenoic acid (AP-20), endothall, and variousmixed formulations of these desiccants. The systemic herbicides included the two tacticalherbicides Orange and White; the potassium salt, triisopropanolamine salts, and theisooctyl ester of picloram; and, a ethylhexyl ester of 2,4,5-T mixed with HCA. Mixturesof propanil, nitrophenol, linuron, and silvex were also evaluated. All chemicals werefurnished by Fort Detrick.Aerial application at these three sites were made with a Bell G-2 helicopter equipped withtwo 40-gallon tanks and a 26-foot boom with 6-inch nozzle positions adaptable forvolume deliveries of 3, 6, or 10 gallons per acre in a 50-foot swath. Spray equipment,pilot, and support were furnished under contract with Allied Helicopter Service of Tulsa,Oklahoma. Aerial applications were made on duplicate 3-acre plots, 200 by 660 feet indimension. A sampling and evaluation trail was established in each plot on a diagonalbeginning at 100 feet from one corner. Major species were marked along 500 feet of thistransect and individual plants were identified by combinations of colored plastic ribbons.A minimum of 10 individuals of each species was marked unless fewer were present.Evaluations were made at 1-, 5-, 10-, 30-, and 60-day intervals by experienced FortDetrick personnel. At each evaluation period the identical marked individuals of themajor species were rated for defoliation and desiccation. At each location, approximately475 gallons (~10 drums) of Herbicide Blue, 95 gallons (~2 drums) of Herbicide Orange,and 6 gallons of Herbicide White were expended.The assistance of Department of Army forestry personnel at Fort Gordon, Fort Chaffee,and the 3 rd and 4 th Army Headquarters were acknowledged in the report for their supportin the selection and preparation of sites in Georgia and Arkansas. The land and facilitiesfor the Florida tests were provided by the Supervisor, Apalachicola National Forest,Tallahassee, Florida. Personnel from the Physical Sciences Division, Fort Detrickassisted in the development of formulations and preparations of field test mixtures. Theyalso provided the data on the physical characteristics of the candidate tactical defoliantsand mixtures.Sources: Darrow RA, Frank JR, Martin JW, Demaree, KD, Creager RA (1971): FieldEvaluation of Desiccants and Herbicide Mixtures as Rapid Defoliants. Technical Report114, Plant Sciences Laboratories, Fort Detrick, Frederick, Maryland. Documentunclassified but subject to special export control. Available from the DefenseDocumentation Center, Accession Number AD 880685.50