Hazard characteristics:
Winter wheat producing areas, many weed species in the northern part of North China. Some wheat fields in Hebei and other places in the wheat after the greening and jointing, the field began to occur in the field, small cockroaches, sown wormwood, leeks, lacquer, wolf comfrey, mica cans, etc.; often after the wheat greening quickly grow. It is necessary to select appropriate herbicide species for timely control according to the grass conditions of different plots.
Occurrence law:
During the greening period of wheat, cockroaches, wormwood, leeks, and lacquers occur in large numbers. According to the regional temperature rise and the growth of winter wheat, after the wheat returns to green, the temperature is obviously warmer, the weather is fine, the temperature is higher than 10 °C, and the weather forecast is coming. In the case of good weather for a few days, the following herbicides can generally be used:
Bensulfuron-methyl chlorofluoropyroxyacetic acid
Bensulfuron + 2 methyl 4 chlorine
Bensulfuron + 2,4-butyl butyl ester
Thiasulfuron + flupiroxyacetic acid
Be sure to pay attention to the weather and the period of wheat growth. Be careful not to apply too early, the temperature is low (less than 10 ° C), the paint is not good when the paint is not green, the wheat is prone to phytotoxicity; the pesticide is not applied too late, the weed is too large, and the wheat is applied after jointing The efficacy of the drug is lowered, the safety of the wheat is not good, and it is prone to serious phytotoxicity. After wheat heading and heading, wheat field mites occur in large quantities, affecting the growth of wheat. The application effect in this period is reduced, which is not good for wheat safety.
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