The best time for the latest wheat weeding in spring

Wheat is one of the main food crops in China, and the planting area in our country is very large. When planting wheat in spring, it is necessary to do a good job of weeding. Only by doing a good job of weeding can we ensure the adequate nutritious growth of wheat. So when should wheat weed in spring? The following editor has brought you the best time for weeding wheat in spring. Let's have a look!

1. Weeding time

In general, the weeding time of spring wheat should be in the period from spring wheat returning to green stage to jointing stage. Among them, the lowest temperature should be kept above 10 degrees, and the temperature had better not drop within 3 days before application. But it mainly depends on the growth of wheat. Because when weeding, wheat is in the stage of returning to green, so its growth rate is relatively fast. So when weeding in spring, if it is in the green period, it is best to deal with it in time before the wheat is covered with weeds.

2. Weeding difficulties

In spring, the growth rate of weeds is also relatively fast, the number is very large, and its roots are also very developed. Therefore, the amount and water consumption of herbicides will be very large, and the cost of weeding will rise, which not only requires a lot of labor, but also takes a lot of time, and it is difficult to control it. In addition, the growth rate of wheat returning to green period is accelerated, wheat leaves are easy to block weeds, weeding is difficult to directly affect weeds, and the efficacy can not be guaranteed.

The leaf hair and waxy layer of weeds in spring are also very developed, and some weeds have appeared buds, most of the weeds have strong growth ability and high drug resistance. And in many areas, the weather is mainly dry and rainless in spring. It is easy to have cold weather in late spring, so the requirements for herbicides and pesticide application technology are relatively high. Finally, when wheat is applied in spring, compared with that before winter, the safety interval is relatively short, and it is easy to cause drug damage, so it is necessary to choose herbicides with short residual period.

3. Points for attention

When spraying herbicides, it must be carried out from the green stage to the jointing stage of wheat. Do not use drugs after jointing stage to prevent drug damage. Pay attention to the weather before medication, if there is a sharp drop in temperature about 3 days before medication, then the drug is not available. At the same time, we should also pay attention to control the dosage, can not be changed at will, if it is a new variety of herbicides, then it can not be used at will. When spraying medicine, spray it evenly. Finally, the corresponding herbicide types should be reasonably selected according to the number of weeds in the field to ensure the efficacy.

The above is a brief introduction to the best time for weeding wheat in spring. That's all for today's introduction. This article is for reference only. I hope it can help you all.