OCONUS DEFOLIATION TEST PROGRAM
Abstract
A test program of aerial spray applications with purple, pink and a group of 8 defoliants, desiccants, and herbicides was initiated to evaluate effectiveness of these chemicals on a mixed forest of broadleaf evergreens and deciduous trees representative of Southeast Asian vegetation. Applications were made with a C-45 equipped with a spray distribution system including a 32-ft boom with Tee Jet nozzles under wings and fuselage and an airdriven pump. Evaluations of vegetation response to chemical treatments were made at periodic intervals. Preliminary observations of defoliation response indicate that: (1) Application of purple and pink gave defoliation superior to that of other chemicals tested in observations made 4 months after treatment. (2) Purple at rates as low as 1.2 gal/acre gave effective defoliation (70-85%) as evaluated 4 months after treatment. Moderate defoliation (30-60%) occurred 1 month after treatment with purple at 2.5 to 3.5 gal/acre during the rainy season. (3) Diquat (4 lb/acre), cacodylic acid (7 lb/acre) and dicamba amine (7 lb/acre) gave moderate defoliation response (30-50%) 1 month after treatment. These were the only active defoliants of the group tested. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1964
- Accession Number
- AD0360646
Entities
Organizations
- United States Army Biological Warfare Laboratories