过去十年里,多年生杂草的防除取得明显的进展,这是因为发现了一些新的选择性和非选择性除草剂,开发了较有效的除草剂混用方法,改进了施药技术和剂型。通常,在地面未被耕动的草地、果园、森林、热带种植园、工业用地和实行少耕或免耕的农田里,多年生杂草的影响较大。此外,某些多年生水生杂草也成为重要问题。在耕作的农田里,反复的机耕限 Over the past decade, significant progress has been made in the control of perennial weeds because of the discovery of several new selective and non-selective herbicides, the development of more effective combinations of herbicides, improved application techniques and dosage forms. Often, perennial weeds have a greater impact on grasslands, orchards, forests, tropical plantations, industrial sites and farmland with or without tillage on the ground. In addition, certain perennial aquatic weeds have also become an important issue. In cultivated fields, repeated tillage limits