Zampiroli Renan, da Cunha João Paulo Arantes Rodrigues, de Alvarenga Cleyton Batista
Institute of Agrarian Sciences, Federal University of Uberlandia, Uberlandia 38408-100, Brazil.
Plants (Basel). 2023 Oct 10;12(20):3525. doi: 10.3390/plants12203525.
Weed management in areas adjacent to coffee plantations makes herbicide drift a constant concern, especially with the use of nonselective products such as dicamba. The objective of this study was to evaluate the phytotoxic effects of the herbicide dicamba alone and mixed with glyphosate as a result of simulated drift in a coffee-producing area. The study was conducted in duplicate at two different coffee cherry development stages. The study was performed with a randomized block design and a 2 × 5 + 1 factorial scheme with four replications using two herbicide spray solutions (dicamba and dicamba + glyphosate) and five low doses (0.25; 1; 5; 10; and 20%). Additionally, a control treatment without herbicide application was also employed. In this study, we evaluated the phytotoxic damage and biometric and productive parameters. Visual damages were observed with the use of dicamba and dicamba + glyphosate doses reduced by 0.25% to 5% in the first days after application. The main symptoms were new leaf epinasty, changes in the internodal distance, and plagiotropic branch curvature. Low doses led to reduced plant height and branch length. The treatments did not reduce productivity and performance but altered the physical classifications of grains.
在咖啡种植园周边地区进行杂草管理时，除草剂漂移一直是个令人担忧的问题，尤其是在使用麦草畏等非选择性产品时。本研究的目的是评估在咖啡产区模拟漂移情况下，单独使用除草剂麦草畏以及将其与草甘膦混合使用所产生的植物毒性效应。该研究在咖啡樱桃的两个不同发育阶段重复进行了两次。研究采用随机区组设计和2×5 + 1析因方案，设置四个重复，使用两种除草剂喷雾溶液（麦草畏和麦草畏 + 草甘膦）以及五个低剂量（0.25%；1%；5%；10%和20%）。此外，还设置了一个不施用除草剂的对照处理。在本研究中，我们评估了植物毒性损害以及生物特征和生产参数。施用后最初几天，使用0.25%至5%剂量的麦草畏和麦草畏 + 草甘膦时观察到了可见损害。主要症状包括新叶偏上性、节间距离变化以及斜生枝条弯曲。低剂量导致植株高度和枝条长度降低。这些处理并未降低产量和性能，但改变了谷粒的物理分类。
