一、概述山芋地的杂草具有出苗期长、发生数量多、生长快的特点。生长前期恰遇黄梅季,又加夏季劳力紧张,人工锄草有一定的困难。因此对山芋地进行化学除草十分必要。自1981年以来,我们就开展对夏季旱地杂草的防治研究,并在本所及江宁县方山乡一带进行了草害调查。发现夏季旱地杂草中单子叶杂草占75％;双子叶杂草仅占25％。其中以千金子发生频度为最高。我所于1981年,1982年以黄豆地为主,并在其他夏熟作物如山芋、芝麻、油菜地上等进行了氟乐灵不同剂量的杀草效果试验。证实了在上述作物地上施用氟乐灵防治杂草的剂量以 First, an overview of the weeds with the emergence of a long period, the occurrence of large quantities of fast growing characteristics. In the early growth period, the yellow plum season happens, and in the summer, the labor force is strained and the artificial weeding has certain difficulties. Therefore, chemical weeding on the potato is very necessary. Since 1981, we conducted research on the prevention and control of summer weeds in the dry land and conducted grass-wee surveys in our area and Fangshan Township, Jiangning County. 75% of monocotyledonous weeds were found in summer dry weeds and only 25% of dicotyledonous weeds. One thousand gold occurrence frequency is the highest. I was in 1981, 1982 mainly soybeans, and in other summer crops such as potato, sesame, rape on the ground and other trifluralin doses of herbicide effect test. The dose of trifluralin to control weeds on the above crop was confirmed