长残留性除草剂是指某些除草剂被使用后,残留在土壤中的效用长达1年以上,易使敏感性后茬作物遭受不同程度药害的除草剂。生产实践中。由于施用长残留性除草剂而对下茬作物造成药害的现象时有发生,给生产造成了不应有的损失。例如目前各地使用的以甲黄隆、绿黄隆、胺苯磺隆等为主要成分的长残留性除草剂,往往使后茬作物水稻生长期出现黄化、矮化等药害症状。因此,必须重视这类除草剂对后茬作物的为害。 Long residual herbicide refers to the use of certain herbicides, the residual effect in the soil for more than 1 year, susceptible to crop plants susceptible to varying degrees of injury to herbicides. Production practice. Due to the application of long residual herbicides, the phenomenon of phytotoxicity to the crops under the crop occurred from time to time, causing undue losses to the production. For example, the long-standing herbicides that are mainly used in various places such as jasmine, chlorosulfuron, and triasulfuron are often used to cause yellowing, dwarfing and other phytotoxicity symptoms in the stubble crop rice growing season. Therefore, we must pay attention to this type of herbicide on the crop after the crop damage.