前言据美国1970年估计,由于杂草为害,损失了近1亿蒲式耳大豆,相当于在400万英亩土地上所收获的产品。可见,草害和病虫害一样,是农业生产中的一大问题。消灭杂草是植物保护的重要任务之一。多年来,剑麻田人工除草,既费时,又费力,是一项繁重的农事活动。剑麻叶片先端有刺,杂草 Foreword According to estimates by the United States in 1970, nearly 100 million bushels of soybeans were lost due to weed damage, equivalent to the products harvested on 4 million acres. Can be seen, grass and pests and diseases, like agriculture and agriculture is a major issue. Elimination of weeds is one of the important tasks of plant protection. Over the years, Sijuntian artificial weeding, both time-consuming and laborious, is a heavy agricultural activities. Sisal leaves a prickly, weeds