College of Agricultural and Veterinary Science, São Paulo State University, Jaboticabal, São Paulo, Brazil.
University Center of the Barretos Educational Foundation, Barretos, São Paulo, Brazil.
J Environ Sci Health B. 2021;56(11):941-947. doi: 10.1080/03601234.2021.1981101. Epub 2021 Sep 23.
The aim of this study was to assess the efficacy of imazamox for control of and to assess the effects of plant decomposition on environmental indicators after application of this herbicide in microcosm conditions. The following rates were used: 600, 700, 800 and 900 g ai ha and spray volume 50 L ha. Control efficacy was determined as the percentage (from 0 to 100%) of visible injury symptoms in the plants, biochemical and chemical oxygen demand (BOD and COD), water quality variables, chlorophyll and pheophytin at 0, 7, 15, 30, 45 and 60 days after application (DAA) and fresh and dry biomass at 60 DAA. Imazamox was effective in controlling 94% of with 900 g ai ha; it reduced 95% of fresh weight and 92% of dry weight of plant at 60 DAA, and reduced chlorophyll of the plants for all rates. For BOD, there was an increase for all rates at 15, 30 and 45 DAA with restoration of the parameters at 60 DAA, and for COD, there was an increase at 60 DAA with 700 and 900 g ai ha. For temperature, pH, dissolved oxygen and electrical conductivity, there was no significant effect after spraying. Imazamox was effective in controlling with 900 g ai ha without causing significant effects on the physical-chemical parameters of water quality.
本研究旨在评估咪草烟对 的防治效果，并评估在微宇宙条件下应用该除草剂后植物分解对环境指标的影响。使用了以下剂量：600、700、800 和 900 g ai ha，喷雾量为 50 L ha。控制效果通过植物可见损伤症状的百分比（0 到 100%）来确定，生物化学和化学需氧量（BOD 和 COD）、水质变量、叶绿素 和脱镁叶绿素 在施药后 0、7、15、30、45 和 60 天（DAA）以及 60 DAA 时的鲜重和干重。咪草烟在控制 94%的 方面有效，用 900 g ai ha 可减少 95%的鲜重和 92%的干重，所有剂量均降低了植物的叶绿素 。对于 BOD，所有剂量在 15、30 和 45 DAA 时均增加，在 60 DAA 时恢复，对于 COD，在 60 DAA 时，700 和 900 g ai ha 增加。对于温度、pH 值、溶解氧和电导率，施药后没有显著影响。咪草烟在 900 g ai ha 时有效控制了 ，对水质的物理化学参数没有造成显著影响。
