Two principles of weeding in wheat fields

Wheat is the main large-scale grain crop in China. The problem of weeding in wheat fields has also been concerned, and weeds in wheat fields can be roughly divided into two types, grass weeds and broadleaf weeds.

Gramineous weeds are dominated by bromegrass and stalked wheat; broadleaf weeds are mainly stalked wormwood, leeks and wheat grass. In autumn and winter, the weeds in the wheat field are small, the dosage is small, the cost is low, and the effect is good. Some weeds in the spring have poor control effect and are easy to cause phytotoxicity to wheat and squat crops. Therefore, weeding in the wheat field should be timely, and the use of pesticides should be targeted.

Today, Xiaobian will talk to you about the prevention and control methods of various weeds in wheat fields.

Gramineous weed

Wheat field dominated by buckwheat, using 9.5% sulfasalin water dispersing granules 9-12.5 grams or 70% flufensulfuron water dispersing granules 3.5 grams;

Wheat field dominated by section wheat, with 3% methyl disulfuron oil suspension 17-22 ml or 3.6% methyl iodsulfuron sodium salt + methyl disulfuron water dispersing granules 15-25 g;

In the wheat field dominated by Mai Niang, 12.5 g of granules with 7.5% acesulfame water, 15-30 g of 15% acetylene oxalate powder, or 6.9% cholestyramine water emulsion 100- 120 ml.

Broadleaf weed

For broad-leaved weeds such as amaranth and sage, which are mainly unearthed before winter, 20-5% bis-fluorofluoroacetate water-dispersible granules can be used per acre, or 5-6.5 g, or 20% chlorofluoxyacetic acid emulsifiable concentrate 40 -50 ml, or 20% chlorofluoperoxyacetate EC-20-25 ml mixed with 20% 2 methyl 4-chlorohydrate 125-150 ml, or 48% bentazon water 55-75 ml and 20% 2 A 4 Chlorine water agent 125-150 ml compounded.

For the mixed wheat field of grass weeds and broadleaf weeds, the above two types of pesticides can be used for scientific and chemical control. When controlling weeds in wheat fields, it is appropriate to add insecticides, acaricides and islands to achieve the goal of “one spray prevention”.

Precautions:

1. Configure the medicinal agent to adopt the second dilution method, the water consumption per mu is 20-30 kg, and the conditions should be adopted as much as possible to control the rule to improve the efficiency and work efficiency;

2. Wheat 3-5 leaf stage, grass weed 2-4 leaf stage (about the end of October to the beginning of November), the wheat field all kinds of weeds are basically out of the control. Choose a day when there is no wind and the minimum temperature is not lower than 4 °C.

More pesticide knowledge , please pay attention to China Pesticide Network


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