Revista Brasileira De Herbicidas 2009; 8(2): 62-67
Different chemical ripeners action on sugarcane yield and technological quality
DOI: 10.7824/rbh.v8i2.69
This study objectified to determine the effect of the ripeners, ethephon, trinexapac ethyl, sulfumeturon metal, fluazifop-p-butil and glyphosate, over technological quality and sugarcane yield. The experiment was carried out in ratoon cane, (RB86 – 7515 genotype) at Santa Antonina Farm, in Sertãozinho County, São Paulo State, in 2007 agricultural year. The experimental design used was randomized complete block with four replications. Treatments tested were constituted by: glyphosate at 0.40 L ha-1, sulfumeturon-methyl 20 g ha-1, sulfumeturonmethyl 10 g ha-1 glyphosate + 0.20 L ha-1, fluazifop-p-butyl 75 mL ha-1, trinexapac-ethyl 0.80 L ha- 1 , ethephon 0.67 L ha-1 and a check without ripeners application. Evaluations were made in the moment of application, 15, 30, 45 and 60 days after products application (DAA). Application of all used products as ripeners promoted significant effect, in relation to the check, for sugar cane Pol characteristic, since the first period of evaluation (15 DAA) until the final (60 DAA). Plant height and ATR were modified by ripeners application inside evaluated periods. Fluazifop-p-butyl application stopped sugarcane growth. Yield was changed by ripeners applications in all evaluated periods. Fluazifop-p-butyl application increased yield immediately after application (15 DAA), however for the other periods, this treatment showed the lowest yield. Sulfumeturon-methyl, sulfumeturon-methyl + glyphosate and ethephon showed the best yield results from 30 and 60 DAA. ATR values were higher with glyphosate and fluazifop-p-butyl application.
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