Accession Number : ADP001780

Title :   Corps Field Operations Studies: Chemical Control,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s) : Rushing,William N.

Report Date : JUN 1983

Pagination or Media Count : 7

Abstract : The principal objective of this chemical control effort was to demonstrate to all concerned that the two herbicides approved for use on waterhyacinth in California can be applied without any significant detrimental effect to the environment. The herbicides in question were diquat and Weedar 64. The Task force's main concern was with the Weedar 64, or 2,4-D, which is a restricted pesticide in California. Diquat is not restricted and thus was not under the same intense scrutiny as the 2,4-D. Properly applied, Weedar 64 can be used to control waterhyacinth in the California Delta environment without resulting in the buildup of undersirable chemical residues. Diquat can be used effectively to kill waterhyacinth in the Delta. Since it is a contact herbicide, however, care must be taken to wet the entire target area for adequate results. The systematic nature of 2,4-D makes it throughout the plant, Further, it is concluded that waterhyacinth control operations can be performed in the Delta using standard outboard boats equipped with the proper spray hardware.

Descriptors :   *Aquatic plants, *Weed control, *Herbicides, *Water hyacinth, Symposia, Aquatic weeds, Chemicals, Control, Safety, Environmental protection, Waterways, Deltas, Rivers, California

Distribution Statement : APPROVED FOR PUBLIC RELEASE