The objective of this study was to evaluate if the use of adjuvants with glyphosate + chlorimuron-ethyl and glyphosate + carfentrazone-ethyl tank mixture influence the quality application and effectiveness for controlling Ipomoea grandifolia. Thirteen treatments, disposed in a completely randomized design, were constituted by tank mixtures of glyphosate + chlorimuron-ethyl (1440 + 12,5 g ha-1) and glyphosate + carfentrazone-ethyl (1440 + 10 g ha-1) isolated and associated to Nimbus®, Joint Oil®, Naturl'Oil®, Triunfo 515® and All Fix®, and a control without application. The adjuvants used were efficient in the reduction of the spray superficial tension; however, did not influence deposition values and control efficiency. Adjuvants provided distinct effects in the reduction of superficial tension, pH and application quality (volumetric median diameter, drops density, potential losses for drift, covered area and drops medium diameter) of glyphosate + chlorimuron-ethyl and glyphosate + carfentrazone-ethyl tank mixtures, but did not interfere in pulverization spray deposition over I. grandifolia targets and glass sheets. Glyphosate + carfentrazone-ethyl presented larger speed for controlling I. grandifolia in relation to glyphosate + chlorimuron-ethyl, in the absence or presence of adjuvants, in spite of glyphosate + carfentrazone-ethyl associated to Nimbus® and Joint Oil® have provided to the target plants the initial development of new leaves.
application technology; glyphosate; chlorimuron-ethyl; carfentrazone-ethyl
