正确掌握施用化学除草剂的时机到底有多么重要?美国南方经济协会的杂草专家罗伯持·恩·安德森博士认为,这取决于你所想要消灭的是什么类型的杂草。镰状豆荚草是美国东南部地区耕地中常见的一种杂草。要消灭这种杂草,最好是在中午前后一段时间内喷洒除草剂,这时的除草效果要比傍晚、夜间或清晨喷药的效果几乎增加一倍。明尼苏达大学的安德森博士和该校的研究生 Correct grasp of the timing of the application of chemical herbicides in the end how important? South American Economic Association Weed experts Dr. Robert? An Anderson, it depends on what you want to eliminate what type of weeds. Sickle pod is a common weed in cultivated land in the southeastern United States. To eliminate this weed, it is best to spray the herbicide some time around midday when herbicidal effects are nearly double that of evening, night or early morning spraying. Anderson, University of Minnesota, and graduate student at the University