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Title: EVALUATION OF THE EFFICACY OF CAPSTAN SYNCHRO SPRAY SYSTEM IN COTTON AND SOYBEAN USING GLYPHOSATE

Author
item Elmore, Carroll
item Smith, Lowrey
item Mulrooney, Joseph - Joe

Submitted to: Proceedings of Southern Weed Science Society
Publication Type: Abstract Only
Publication Acceptance Date: 1/24/2000
Publication Date: 2/6/2000
Citation: Elmore, C.D., Smith, L.A., Mulrooney, J.E. 2000. Evaluation of the efficacy of Capstan Synchro Spray System in cotton and soybean using glyphosate. Proceedings of Southern Weed Science Society. 53:172-173.

Interpretive Summary:

Technical Abstract: A test was conducted on the research farm at Stoneville, MS of the efficacy of glyphosate from various test conditions and nozzle arrangements on five weed species in cotton and soybean. A total of 12 nozzle arrangements with and without the Capstan Synchro Spray system were compared with the conventional XR11002VS tip at 6 mph and 10 gpa applied with a hooded boom. All treatments except the hooded boom were applied with a Tyler Patriot fitted with TT11008vp, TT11003vp, TT11004vp, Hardi Injet 03, or Hardi Injet 04 tips. The TT11008vp tips were applied with the Aim Command System activated. The hooded boom arrangement results in a spray particle size of 220 um, which is smaller than the other tips which have a particle size of 425 or greater. The purpose of the Capstan Synchro system is to produce larger particles for the express purpose of reducing drift potential. The test weed species were morningglory species, prickly sida, barnyardgrass, johnsongrass, and common cocklebur. The test was conducted twice in a strip block design with six replications. The hooded boom was equal or better for weed control than all other treatments. In the second test when the rate of glyphosate was reduced, a better discrimination of efficacy effects were noted. A number of treatments were worse than the hooded boom standard and not all were related to the Aim Command feature. The results suggest that the hooded boom is the superior system for glyphosate application, but other systems are equally as good, as long as the rate of glyphosate is not reduced.