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ARS Home » Research » Publications at this Location » Publication #99613
Title: INFLUENCE OF DRIFT RETARDANTS ON EFFICACY, DROPLET SIZE, AND SPRAY PATTERNSOF ROUNDUP ULTRA HERBICIDE.

Author
item WILLS, G. - DELTA RES. & EXT. CENTER
item Hanks, James
item JONES, E. - DELTA RES. & EXT. CENTER
item MACK, R. - HELENA CHEMICAL CO.

Submitted to: Proceedings of Southern Weed Science Society
Publication Type: Abstract Only
Publication Acceptance Date: 1/24/1999
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: Field and laboratory studies were conducted to determine the effect of nine experimental drift retarding chemical compounds on the weed control activity, the shape of the spray patterns, and the prevention of very small, highly driftable spray droplets of Roundup Ultra herbicide spray solutions. Weed control was determined in field tests with herbicide treatments on four different weedy plant species. Spray patterns were determined by spraying the spray mixtures onto a sheet of corrugated metal with troughs spaced 2.5 inches apart and collecting in 100-ml graduated cylinders. Spray droplet size was determined using a Malvern 2600 Lc laser particle analyzer. The most effective drift retardants mixed with Roundup Ultra which resulted in the greatest percent weed control, the best controlled spray patterns, and best prevention of very fine spray droplets were those with the experimental numbers: HM9733-A; HM9752; HM9842; HM9847; ;and HM9850.