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Efficacy of Corn (Zea mays) Herbicides Applied at Reduced Rates Impregnated in Dry Fertilizer

Published online by Cambridge University Press:  12 June 2017

Thomas L. Rabaey  and
R. Gordon Harvey
Thomas L. Rabaey
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706-1597
R. Gordon Harvey
Affiliation:
Dep. Agron., Univ. Wisconsin, Madison, WI 53706-1597
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Abstract

Field studies were conducted in 1992 and 1993 to evaluate the efficacy of EPTC plus R-29148 (EPTC+) plus cyanazine and alachlor plus cyanazine. Materials were applied PPI and PRE to corn at 25, 50, 75, and 100% of labeled rates in an aqueous solution (sprays) and as herbicide-impregnated fertilizer. EPTC+ plus cyanazine at all rates applied as sprays or as herbicide-impregnated fertilizer controlled 89% or more of giant foxtail. Velvetleaf and common lambsquarters control was less when alachlor plus cyanazine was applied as herbicide-impregnated fertilizer than when applied as sprays. When sprayed, alachlor plus cyanazine applied PPI controlled 95% giant foxtail only at the 100% rate without cultivation, but at all rates with cultivation. Alachlor plus cyanazine applied as impregnated fertilizer at 50, 75, and 100% labeled rates controlled 88% or more of giant foxtail when these treatments received a interrow cultivation. PRE treatments of alachlor plus cyanazine applied as herbicide-impregnated fertilizer were less effective in 1992 than in 1993 because of lack of timely precipitation following application.

Keywords

Alachlor, 2-chloro-N-(2,6-diethylphenyl)-N-(methoxymethyl)acetamidecyanazine, 2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl]amino]-2-methylpropanenitrileEPTC, S-ethyl dipropyl carbamothioateR-29148, 3-(dichloroacetyl)-2,2,5-trimethyloxazolidinegiant foxtail, Setaria faberi Herrm. ♯ SETFAvelvetleaf, Abutilon theophrasti Medicus ♯ ABUTHcommon lambsquarters, Chenopodium album L. ♯ CHEALcorn, Zea mays L., ‘Pioneer 3751.’Aqueous solution spraysintegrated weed managementinterrow cultivationrotary hoeingalachlorcyanazineEPTCAbutilon theophrastiChenopodium albumSetaria faberiABUTHCHEALSETFA
Type
Research
Information
Weed Technology , Volume 8 , Issue 4 , December 1994 , pp. 830 - 835
Copyright
Copyright © 1994 Weed Science Society of America 

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References

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