Assis Juliana Stéfani Jabur De, Tornisielo Valdemar Luiz, Reis Fabricia Cristina Dos, Martins Bianca A B, Toledo Roberto Estevão Bragion, Filho Ricardo Victória
a Department of Plant Science , University of São Paulo , Piracicaba , Brazil.
b Laboratory of Ecotoxicology , Center of Nuclear Energy in Agriculture , Piracicaba , Brazil.
J Environ Sci Health B. 2018;53(11):746-750. doi: 10.1080/03601234.2018.1480162. Epub 2018 Jun 8.
In Brazil, weed management in sugarcane fields is mainly done with the use of selective herbicide formulations. For many years, diuron+hexazinone was one of the main herbicide mixture formulations used in sugarcane. Later, sulfometuron-methyl was included in the same mixture, which was marketed as a new herbicide formulation for residual in-season weed control in sugarcane. The mixture diuron+hexazinone+sulfometuron-methyl has been widely used in commercial sugarcane fields in Brazil. However, recent field observations have shown that sugarcane plants at different growth stages varied in their phytotoxicity levels after treatment with diuron+hexazinone+sulfometuron-methyl. Greenhouse and laboratory studies were conducted to determine Csulfometuron-methyl absorption and translocation, as well as C distribution in sugarcane at two growth stages, 2 to 3 leaves and 5 to 6 leaves. Csulfometuron-methyl absorption by sugarcane did not differ between the two growth stages. Different patterns of C accumulation were observed, which may explain variations in sulfometuron-methyl phytotoxic responses observed in the field.
在巴西，甘蔗田的杂草管理主要通过使用选择性除草剂配方来进行。多年来，敌草隆+嗪草酮是甘蔗田使用的主要除草剂混合配方之一。后来，甲基磺草酮被纳入同一混合物中，作为一种用于甘蔗季内残留杂草控制的新型除草剂配方进行销售。敌草隆+嗪草酮+甲基磺草酮混合物已在巴西的商业甘蔗田广泛使用。然而，最近的田间观察表明，用敌草隆+嗪草酮+甲基磺草酮处理后，不同生长阶段的甘蔗植株在植物毒性水平上存在差异。进行了温室和实验室研究，以确定甲基磺草酮在甘蔗两个生长阶段（2至3叶期和5至6叶期）的吸收、转运以及碳在甘蔗中的分布。甘蔗对甲基磺草酮的吸收在两个生长阶段没有差异。观察到了不同的碳积累模式，这可能解释了在田间观察到的甲基磺草酮植物毒性反应的差异。
