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ARS Home » Research » Publications at this Location » Publication #183075
Title: COMPARISON OF DRIFT CONTROL ADJUVANTS USING AIR MIX AND EXTENDED RANGE TEEJET SPRAY NOZZLES

Author
item WILLS, G - DELTA RESEARCH EXT CTR
item Hanks, James
item JONES, E - DELTA RESEARCH EXT CTR
item MACK, R - DELTA RESEARCH EXT CTR
item ALFORD, B - DELTA RESEARCH EXT CTR

Submitted to: Proceedings of Southern Weed Science Society
Publication Type: Abstract Only
Publication Acceptance Date: 1/20/2005
Publication Date: 8/1/2005
Citation: Wills, G.D., Hanks, J.E., Jones, E.J., Mack, R.E., Alford, B.W. 2005. Comparison of drift control adjuvants using air mix and extended range teejet spray nozzles. Proceedings of Southern Weed Science Society. Vol. 58:57.

Interpretive Summary: Not required - abstract only.

Technical Abstract: Field and laboratory studies were conducted to determine the effect of the experimental drift control adjuvants HM 2005B, HM 0343, and HM 9752 each at 9 lb/100 gal on the efficacy and droplet size of glyphosate as formulated without surfactant as Roundup D-Pak® and with surfactant as Roundup Original® with both the TeeJet® Extended Range 110015VS and the Greenleaf Technologies Air Mix® 110015 spray nozzles. Glyphosate was applied at 0.5 lb ai/A. At 2 WAT, weed control of the four weedy species in this study using the Extended Range nozzle type with glyphosate formulated without surfactant with no drift control agent was 81 to 93%, with HM 2005B was 93 to 97%, with HM 0343 was 90 to 94%, and with HM 9752 was 91 to 95%. Using glyphosate formulated with surfactant the percent control with no drift agent was 89 to 96%, with HM 2005B was 91 to 96%, with HM 0343 was 94 to 98%, and with HM 9752 was 94 to 98%. Weed control with the Air Mix nozzle type using glyphosate formulated without surfactant with no drift agent was 55 to 90%, with HM 2005B was 80 to 95%, with HM 0343 was 89 to 94%, and with HM 9752 was 88 to 97%. Using glyphosate formulated with surfactant with no drift control agent was 84 to 95%, with HM 2005B was 90 to 95%, with HM 0343 was 88 to 95%, and with HM 9752 was 91 to 98%. Averaged over all treatment mixtures there were less volumes of fine (<141 u) spray droplets using the Air Mix than using the Extended Range nozzle types. With each nozzle type, there were similar effects on herbicidal efficacy and droplet size with each drift control adjuvant. With each nozzle type, the addition of a drift control adjuvant to glyphosate formulated without and with surfactant resulted in approximately 25 and 35% less spray volume as fine droplets respectively than glyphosate with no drift control adjuvant.