大豆田草害,特别是一些多年生杂草较难防治。它们的根芽在生长季节随时可以萌发,且地上部分除掉或根茎切断时,还能能再生;根、茎较深,对铲蹚等机械操作有较强的抵抗力;一般除草剂对茎叶和生长点有一定的抵制能力,却不能杀死整株,反而刺激起萌发出大 Soybean field grass damage, especially some perennial weeds more difficult to control. Their root buds can germinate at any time during the growing season and can be regenerated when the aboveground parts are removed or the rhizomes are cut off. Roots and stems are deep and have strong resistance to mechanical operations such as shoveling trips. Leaves and growing point have a certain ability to resist, but can not kill the whole plant, but to stimulate the emergence of a large