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Bermudagrass (Cynodon dactylon) Control in Sunflower (Helianthus annuus), Soybean (Glycine max), and Potato (Solanum tuberosum) with Postemergence Graminicides

Published online by Cambridge University Press:  12 June 2017

Francisco Bedmar
Francisco Bedmar*
Affiliation:
Departamento de Producción Vegetal, Facultad de Ciencias Agrarias-UNMDP, C.C. 276, 7620 Balcarce, Argentina
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Abstract

Field experiments were conducted from 1989 to 1992 in Balcarce, Tandil, and San Cayetano, all in Buenos Aires province (Argentina), to evaluate clethodim, fenoxaprop-P-ethyl, fluazifop-P, haloxyfop, propaquizafop, and quizalofop-P-ethyl for bermudagrass control in sunflower, soybean, and potato. The highest levels of bermudagrass control 60 days after treatment (DAT) were generally obtained with fenoxaprop-P-ethyl, haloxyfop, propaquizafop, and quizalofop-P-ethyl. Late season bermudagrass control, based on biomass of stolons and rhizomes, suggested that the most consistent treatments in potato and sunflower were haloxyfop at 180 g ai/ha and quizalofop-P-ethyl at 54 g ai/ha. In soybean, clethodim at 336 g ai/ha, haloxyfop at 180 g/ha, propaquizafop at 100 g ai/ha, and quizalofop-P-ethyl at 54 g/ha provided the greatest reductions in bermudagrass biomass. All of the postemergence (POST) graminicide treatments increased crop yields when compared to a nontreated check. However, little or no difference in yield was obtained when herbicide rate was increased.

Keywords

Clethodim, (E,E)-(±)-2-[1-[[(3-chloro-2-propenyl)oxy]imino]propyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-onefenoxaprop-P-ethyl, ethyl(±)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoatefluazifop-P, (R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy] phenxoy]propanoic acidhaloxyfop, (±)-2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy]propanoic acidpropaquizafop, (R)-2-[[(1-methylethylidene)amino]oxy]ethyl 2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]-propanoatequizalofop-P-ethyl, ethyl(R)-2-[4-[(6-chloro-2-quinoxalinyl)oxy]phenoxy]propanoatebermudagrass, Cynodon dactylon (L.) Pers. # CYNDApotato, Solanum tuberosum L.soybean, Glycine max (L.) Merr.sunflower, Helianthus annuus L.Clethodimfenoxaprop-P-ethylfluazifop-Phaloxyfoppropaquizafopquizalofop-P-ethylCYNDADAT, days after treatmentPOST, postemergenceVDM, vegetative dry matter
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 683 - 688
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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