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Comparisons of HOE-39866, SC-0224, Paraquat, and Glyphosate in No-Till Corn (Zea mays)

Published online by Cambridge University Press:  12 June 2017

Henry P. Wilson
Agric. Res. Sci., Virginia Truck and Ornamentals Res. Stn., Painter, VA 23420
Thomas E. Hines
Dep. Hortic., Virginia Polytechnic. Inst., State Univ., Blacksburg, VA 24061
Robin R. Bellinder
American Hoechst Corp., Rte. 202–206, Summerville, NJ 00867
John A. Grande
American Hoechst Corp., Rte. 202–206, Summerville, NJ 00867


Field studies were conducted for 4 yr with HOE-39866 [ammonium-(3-amino-3-carboxypropyl)-methylphosphinate] and for 2 yr with SC-0224 (trimethylsulfonium carboxymethylaminomethylphosphonate) to compare foliar activities with those of paraquat (1,1’-dimethyl-4,4’-bipyridinium ion) and glyphosate [N-(phosphonomethyl)glycine] in no-till corn (Zea mays L. ‘Pioneer 3320’ in 1981 and ‘Pioneer 3184’ in 1982 and 1983). Rates evaluated were 0.6 to 1.7 kg ai/ha for all herbicides except paraquat which was included at 0.3 and 0.6 kg ai/ha. Control of rye (Secale cereale L.) was excellent at all rates with SC-0224, paraquat, and glyphosate, but HOE-39866 was effective only when combined with residual herbicides. All four herbicides provided good initial control of horseweed [Conyza canadensis (L.) Cronq., ♯ ERICA], but recovery following paraquat application was extensive. Combinations of HOE-39866, SC-0224, and glyphosate at 0.6 kg/ha with atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] at 1.1 to 1.7 kg ai/ha + metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] at 1.7 kg ai/ha produced antagonistic responses against rye and sometimes horseweed. In 1983, the combination of SC-0224 + residual herbicides provided significantly better control of rye and horseweed 8 days after treatment than the combination of glyphosate + residual herbicides.

Weed Control and Herbicide Technology
Copyright © 1985 by the Weed Science Society of America 

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