It is suggested that the combination of stem and leaf treatment should be closed during this period, and high-safety stem and leaf treatment chemicals should be selected, such as Qianjin gram (25% cyhalofop-ethyl) 1 10g+ pretilachlor (including safety agent) 100g and water 15kg. 1-2 days later, rehydrate for 7 days, and after 7 days of stem and leaf treatment, topdressing 20-30g of pyrazosulfuron mixed urea.
The treatment scheme can not only control the unearthed weeds, but also seal the unearthed weeds.