Flowering and ripening are physiological processes in the sugarcane crop influence directly the sugar yield. Therefore aerial applications, in sublethal doses of agrochemicals that act as growth regulators by altering biochemical and metabolic pathways, are useful. To improve the growth regulators' efficiency, the addition to the mix of adjuvants is a helping tool for avoiding drift and evaporation.The aim of this work was to assess the effect of Amine salts of organic acid and aromatic acid (Bivert) 0.015 L i.a./L commercial product as an adjuvant, mixed with ethephon 720 g i.a ha-1 used as flowering inhibitor and glyphosate 356 g e.a. ha-1used as sucrose accumulation enhancer.The results showed an increase of the effectiveness in the flowering inhibition in a range from 74% to 95%. Increase of the sucrose accumulation in a range from 2.5% to 8.6% and improving of the volume median diameter (VMD 409 �m).Tables 1 Effect of growth regulatorswith and without adjuvant for inhibition of the flowering of sugarcane, cultivar CP88-1165 in cane plant and cane ratoons in two localities.1Average two sampling dates, 2Average two studied years. VMD �m (VD0.5) = volume median diameter. 3Average of 32 water sensitive paper. DepositScan - Portable Scanning System for Spray Deposit Distribution (USDA ARS. * **indicate significant difference by LSD test at 5% probability (p0.05).Figure 1 Aerial application of ripener glyphosate with and without adjuvant. Sugar Mill Magdalena. Average two studied years 2010/2011 and 2011/2012. * **indicate significant difference LSD test at 5% probability (p<0.05).

Effect of adjuvant in a mixture with two growth regulators on the flowering inhibition and sucrose accumulation on sugarcane in Guatemala

248th National Meeting (2014)

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