一、禾草的化学防除。在禾草单生,而没有阔叶草和莎草的红薯田,可用氟乐灵、喹禾灵、拿捕净防除。常用的防除方法如下:每667平方米用48%的氟乐灵乳油80~120毫升,对水40千克,于整地后栽插红薯前喷雾。注意在30℃以下,下午或傍晚用药,用药后立即栽薯秧,也可用氟乐灵与扑草净混用;每667平方米用喹禾灵乳油60~ First, the chemical control of grass. In the grass solitary, and no broadleaf grass and sedge sweet potato fields, available trifluralin, quizalofop, net catch control. Commonly used as follows: Each 667 square meters with 48% of trifluralin EC 80 ~ 120 ml, 40 kg of water, after the planting sweet potato before spraying. Note that below 30 ℃, afternoon or evening medication, immediately after planting potato seedlings can also be used triflural and prometryne net mix; with Quizalofop hydrochloride 667 square meters for 60 ~