Since broadleaf weeds and broadleaf vegetables belong to dicotyledonous plants, bud (pretreatment) is mainly used to eliminate broadleaf weeds.
If there are more weeds before the preparation of the land, the grass in the field should be treated first with the herbicides such as paraquat and glyphosate. After the weeds die, the soil is re-grounded. In order to effectively avoid the weeds in the field after the whole land, it should be planted or transplanted immediately. At this time, the weeds can be controlled, and the herbicide can be used for pre-emergence treatment.
The use of chemicals to control broadleaf weeds after emergence and colonization of vegetables depends on the situation. If the seedlings and weeds do not have obvious boundaries in the field, they are mixed together and can only be removed manually. If weeds are mainly grown in rows or in furrows of vegetable cultivation, stem and leaf treatment herbicides (such as paraquat) can be used.
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China National Huachen Energy Group Co., Ltd. , http://www.chc-chem.com