The fastigium of weed occurrence was 20-40 days after the new root planting or old root harvest in water sugarcane land, while 20-50 days after the rainy season begin in arid sugarcane land.

• 云南省水浇甘蔗田杂草发生高峰期在新蔗种植或宿根蔗收砍后20天-40天;旱地甘蔗田杂草发生高峰期在雨季开始后20天-50天,是施用除草剂的最佳时期。