I. Agricultural control
1. Strengthen plant quarantine. All units and individuals that have introduced wheat seeds must undergo quarantine before dispatching seeds. Quarantine-free wheat seeds must not be transferred to planting, and it is forbidden to transfer seed from areas with vicious weeds to prevent the spread of vicious weeds.
2, replace the variety. The wheat fields with vicious weeds will all be single-fed and singles, and shall not be reserved for seed use. Before wheat is sown, they shall be uniformly planted. Choose disease-free, weed-free seeds, and good varieties suitable for local cultivation.
3, the implementation of a reasonable rotation dumping. Rotation with dicotyledonous plants for 3-5 years, such as soybean, oil sunflower, potato, vegetables, cotton and other crop rotation.
4, manual removal. Manual removal is an effective way to solve the vicious weeds such as Aechophagium and Bromegrass. Before the weed seeds are immature, the weeds must be removed. The weeds should be buried deep after the weeds are removed. They must not be thrown anywhere to avoid spreading again.
5, timely cultivation and weeding. In the wheat growing season, weeding and weeding were carried out in time, and the weeds in the land along the canal were cleared away.
Second, chemical control with wide world Ma 15-20g per mu plus special additives 50-100ml in the 3-5 leaf stage of wheat, when the temperature is not lower than 3 °C when spraying. In the spring of the following year, the temperature is controlled at 3-5°C and the effect is better. Use the precautions of Cosmos:
1. The spray is conducted on a sunny day and the temperature is not lower than 3°C.
2, strict drug use.
3, flooding before and after spraying two days without flooding, precipitation 8 hours after spraying affect the efficacy.
4, weak seedlings should not be sprayed.
5, must be diluted twice, can not repeat the spray.
6, yellowing, seedlings phenomenon, returned to normal after 3-4 weeks.
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