To control weedy weeds, we must implement the principle of comprehensive management of pests, give full play to the role of natural control factors, adjust measures to local conditions, coordinate the application of weed control measures, control weeds below the allowable level of economic losses, and increase farmers' income.
Strengthening the management of returning green crops to wheat
At present, the wheat in the southern winter wheat area of ​​the rice planting area is in the turning green stage, and the wheat in the winter wheat cultivation area in the north is in the period of getting up. Strengthening the management of water and fertilizers, promoting the spring wheat tillering to the panicle, and nurturing strong seedlings will help improve the wheat's own competitiveness and control the weeds. In the lower part of the community, reduce its harm.
Select herbicides for different weed species
At present, about 40 herbicide species are registered in China's wheat fields, and the herbicides used to control broad-leaved weeds are tribenuron-methyl, 2,4-D, dicamba, diflufenachlor, methomoxim, cyclopropane. Sulfosulfuron, bromoxynil, pyrafluid, ethyl flufenazone, flufenoxazone, fluoxyl, etc. The main agents for control of grass weeds include clodinafop oxalic acid, oxazolyoxime, and oxazoline. Grass esters, flucarbazone, methylsulfuron, imidazolam and the like. Each of the above-mentioned agents has its own characteristics and can be selected according to the type of weeds in the field.
As far as broad-leaved weeds are concerned, the use of tribenuron, 2,4-D, dicamba, fluoxyl, etc. in the wheat fields of the northern wheat region where the dominant species of S. sophorae, amaranth, and alfalfa are preferred. Wheat fields can be used for the prevention and treatment of Fisch, Swine Fever, and Large Habitat, and other agents such as flufenoxime, flufenoxam, cypromisulfuron, and the like can be selected.
The control of grass weeds can be based on the occurrence of species, the choice of clodinafop-propargyl, fenoxaflorin, oxazoline oxime, xylazosulfuron, imidazide, methylsulfuron and so on. Multi-flowered ryegrass, Poa, hard-grass, alfalfa, wild oats, A. aequalis, A. mellifera in Japan, etc., can use clodinafloxacin, oxazolyoxadien, oxazoline, flurazoxuron, pyridine Sulfachlor, methylsulfuron, etc., bromegrass and amygdalin are more effective than methylsulfuron.
Chemical weeding should grasp the appropriate drug use period and application amount. The stem and leaf treatment agent should be sprayed after the basic weeds are fully emerged. The application amount is based on the registered dose, and excessive application of pesticides will also cause injury. Some herbicides such as bromoxynil, pyrafen, ethyl flufenazone, and flufenoxazone, etc., have relatively poor conductivities. They need to be applied early in the treatment of stems and leaves, excessive application of weeds and pesticides. Whole plants kill weeds. Isoproturon weeding should be treated with soil, and stem and leaf treatments are poor.
Take supplementary measures to reduce herbicide dosage
For example, the establishment of breeding and seed use standards prohibits the seed supply agencies and farmers from using the wheat harvested from the fields of the weedy weeds as the wheat seed for the following year; strictly prohibiting the use of the weeds of the weeds, such as the stephen, ryegrass and aegis weeds. In the area where the hazard occurred, the wheat species will be transferred, and the introduction and adjustment of the seed must be quarantined by the plant quarantine department; the farmers in the disaster-hit area shall be provided with uniform seeds and the seeds shall be renewed; the cross-area combine harvesters shall be banned in the severely affected areas and be harvested separately or Manual harvesting; adding filters to the upper reaches of the irrigation system to collect weed seeds to avoid or reduce damage to the irrigated farmland; remove weeds that grow in fields, fields, fields, roadsides, and canals to block upstream weed seeds Incoming.
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