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Interaction of Pyrithiobac and Graminicides for Weed Control in Cotton (Gossypium hirsutum)
W. James Grichar, Brent A. Besler, Kevin D. Brewer and Robert G. Lemon
Vol. 17, No. 3 (Jul. - Sep., 2003), pp. 461-466
Stable URL: http://www.jstor.org/stable/3989176
Page Count: 6
You can always find the topics here!Topics: Amaranth, Cotton, Herbicides, Weed control, Broadleaf weeds, Peanuts, Checks
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Field studies were conducted from 1996 through 1998 to evaluate control of broadleaf signalgrass and slender amaranth by clethodim, fluazifop-P-butyl, and fluazifop-P-butyl plus fenoxaprop-P-ethyl applied alone, in combination with pyrithiobac, or sequentially with pyrithiobac. Broadleaf signalgrass control with graminicides alone was 75 to 100%. Although broadleaf signalgrass control with clethodim was not reduced by pyrithiobac, control with fluazifop-P-butyl and fluazifop-P-butyl plus fenoxaprop-P-ethyl was reduced by pyrithiobac. Pyrithiobac controlled slender amaranth 85 to 100% when applied alone. However, slender amaranth control by pyrithiobac was inconsistent when pyrithiobac was applied in mixture or sequentially with graminicides. A reduction in slender amaranth control may have resulted from a combination of reduced graminicide efficacy and interference caused by broadleaf signalgrass with slender amaranth (pyrithiobac alone). Cotton yields were highest when pyrithiobac was applied 24 h after graminicides.
Weed Technology © 2003 Weed Science Society of America