Wheat field chemical weeding to "three look"
At present, weeds have been basically unearthed, with small wheat seedlings, small canopy density in wheat fields, small weeds and young tissues, poor drug resistance, and the ability of pesticides to fully exert their efficacy. One-off application basically controls the damage to weeds in the whole growing period. As for the safety of the rear crop, the weed control effect was significantly better than that of the early spring. Farmers and friends everywhere should grasp the current favorable opportunity to quickly carry out chemical weeding in winter wheat fields.
Do "Three Looks" and apply pesticides in a timely manner. "A look" germination situation. After observation in the field, the emergence of weeds was small, and wheat emerged late, about 15 days later than wheat. Wheat seedlings showed certain resistance to herbicides at the 3rd to 4th leaf stage. At this time, the application of pesticides could ensure the safety of wheat seedlings. With less wheat tillers and less cover in the field, it is beneficial to weed seedlings to fully absorb liquid medicine and try to avoid low-temperature application. "Second look" soil sensation. There is a direct relationship between the effectiveness of weeding and soil moisture. After the emergence of wheat, if the soil moisture is poor, the water must be increased when the pesticide is applied. The water consumption per mu should not be less than 30 kg. At this time, it is not appropriate to use mobile spraying and weed control. "Three look" weather. Mainly depends on the temperature and wind force after application. In order to achieve good weeding effect, it must have 3 to 5 degrees of temperature at 8 to 10 degrees when there is no wind or breeze. If there is wind, it should work in the wind when spraying.
Avoid single medication and take rotations. Continuous single medication, weeds easily produce drug resistance, affecting weeding effect. Sulfonylureas, such as tribenuron-methyl, broad-leaf net, etc., should be replaced with flufenoxaone to delay the development of drug resistance and ensure the stability of control effects. Http://Content/2bcedecf-87ac-4e39-8a18-fbdcf73d8a2e?cType=2
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