(1) Broad-leaf weed control The use of phenoxyacetic herbicides (such as 2,4-dibutyl or 2-methyl-4-chloro), benzoic acid herbicides (eg, herbicides) can be used to control broad-leaved weeds in wheat fields. Herbicides and mixtures thereof, nitrile herbicides (such as bromoxynil or iodobenzonitrile), sulfonylurea herbicides (such as broadleaf leaves or broad-leafed nets), and heterocyclic herbicides (such as Bentazon Wait). For example, wheat fields dominated by weeds can be controlled by triazine herbicides (such as Xicaojing). Broad-leaved weeds and monocotyledonous weeds can be used in wheat crops. Substituted urea herbicides (such as chlorotoluron, isoproturon, and liguron, etc.) can be used; wheat crops can be dominated by wild oats. Use herbicides such as Oat-fighting, Valerian, Rhizoma alba, or Oatmeal alone. If wild-based oats are used as the main crop for both wheat and broad-leaved weeds, phenoxy-acetic acid herbicides can be used as a combination of wild-type and dry-type waste ( Such as 2,4-D-butyl butyl, etc.); such as wheat fields in the barnyardgrass, Setaria and broad-leaved weeds and sometimes, can be used to control the Putian net. Herbicides that cannot be mixed should be used singly. The interval between the use of the two agents should be more than 6 days in order to avoid phytotoxicity or reduce the control effect. 12,4-Dropicide Herbicides These herbicides are currently the most widely used herbicides in the control of broadleaf weeds in wheat fields. 2,4-D herbicides to control broad-leaved weeds in wheat fields should be applied before the 4-leaf stage of wheat crops, which is safe for crops. For example, after the four-leaf stage till the flowering stage, besides producing phytotoxicity to the wheat crops, the liquid droplets will also harm the sensitive crops that have emerged in the vicinity. Wheat crops are forbidden to use when heading and raising flowers. 2 Paraquat enemy can control many kinds of annual and perennial broad-leaved weeds, such as Amaranthus retroflexus, Amaranthus trifoliata, Amaranthus retroflexus, Damascus, Azalea, Commelina, Xanthium, Artemisia annua, Salsola purpurea , Tian Xuan Hua, Xiao Xuan Hua, ask Jing, Xian Cai, shamrock, lone vegetable, wheat bottle grass, leeks, sow wormwood, Poria, Chinese wolfberry, Solanum nigrum and so on. This agent is forbidden to use after the start of joint cropping of wheat crops, otherwise it will cause phytotoxicity and cause a reduction in production. In the event of abnormal weather or heavy production of pests and diseases, the herbicide should not be used in general; Beans, cotton, fruit trees, grapes, potatoes, sunflowers, tobacco and tomatoes are all sensitive to paraquat. When spraying herbicides, pay attention to avoid touching droplets of liquid medicine to sensitive crops in the vicinity. In the wheat field, the herbicide is only used by the herbicides to kill the herbicides. The safety is poor, and the cost is slightly higher. Generally, the use of 48% aqueous solution of 20-33 ml/mu, spraying of stems and leaves. 3 Broad-leaved and broad-leaved nets are suitable for controlling broad-leaved weeds in wheat, barley, and oat fields, such as Amaranthus retroflexus, wild mustard, S. sophorae, Amaranthus, Kochia scoparia, grasshopper, Poria pilosa, bryophyte, stinking Chrysanthemum and Salsola purpurea etc.; broad-leaf scattered control except for purslane, virginiana, wild mustard, swine cricket, spring locust, flower of valeriana, broadleaf net to control valerian, maijiagong, zephyr, and valerian , leaf lettuce and salsas. (2) Broad-leaf weeds and grass weeds are mixed in the field of control of wheat crops. If the broad-leaved weeds and the monocotyledonous weeds are mixed, the following herbicides can be used to prevent them and achieve good results. 1 chlorsulfuron-methyl; this agent is a super-efficient internal absorption transmissive selective pre-emergence and post-emergence herbicide with a long residual effect and is safe for wheat at the recommended dosage. It can control cockroaches, cockroaches, cockroaches, roll stems, cockroaches, leeks, sow wormwood, and pig bristles, and treats grassy weeds such as amaranth, bluegrass, crabgrass, barnyardgrass, and setaria grass. 2 Green Mailong; The agent to control wheat apricots in the wheat, precocious quail, bred, quail, bristle, cocklebur, mother-in-law and so on. 3 Isoproturon; 4 Ligulong; 5 Praxegrash; 6 Hetian.
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