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Due to the delay in the sowing time of wheat in 2017, and the dry weather when wheat emerged, many small seedlings, yellow seedlings and weak seedlings were formed, and the proportion of the second and third types of seedlings increased.
For the current wheat, due to the moisturization of two Swiss snow, it can be regarded as safe winter, but for the chemical weeding of wheat, the time after the year is relatively tight, and the big friends are more arduous, so the chemical control work after wheat is very important. Need to remind farmers to grasp these four criteria: one grab, two quasi, three stable, four!
grab
1, grab time
February 4th is the Spring Festival, after the spring, the day is getting longer, the temperature is gradually rising, and the wheat and weeds enter the rapid growth stage, so we must grab the early and grab the medicine. Remind farmers that friends must carry out wheat chemical control before 9:00 am after 9:00 am, especially to avoid the rainy weather. After the Spring Festival, it is very prone to cold spring, to avoid the occurrence of frozen drugs.
2, grab the temperature
Farmers’ friends should hurry up and take medicine when the cold tail warms up and the temperature rises. In the early spring, the temperature changes indefinitely. Farmers’ friends should pay attention to observe the local real-time updated weather forecast when applying drugs!
quasi-
1. Look at the grass phase and grass age
Before hitting the herbicide , remind everyone to see the grass phase and start again, such as distinguishing grass weeds and non-grass weeds; seeing weed density and grass age (the weeds are older).
2, accurate choice of pharmacy
For the selection of chemical herbicides, you must choose a regular registered large manufacturers, do not use drugs containing hidden components. There are several main types of pharmaceuticals in the market:
(1) Grass weeds
It is represented by oxazoline (Humma) and acetylene ester (Maji); it can be used for fields mainly based on wild oats along the north of Huaihe.
A single-agent or compound preparation represented by methyl disulfuron (Shima, Kuo Shima): It can be used mainly for bluegrass, hard grass and maiden, along the Huai River area along the Huaihe River.
A preparation represented by acesulfame (buckwheat, priority): It can be used for the fields of Mai Niang, Wild Oats, Po Po Na, and Wild Boss along the Huaihe River and along the south of Huaihe River.
(2) broadleaf weeds
2 A 4 chlorine single agent and compound preparation (Harry, Australia and Tiger): For the use of mother-in-law, cattle sorghum, sowing sage, and thorn vegetable field, wheat must be used after 4 leaves and 1 heart until the jointing.
A single dose of fluoxetine and a compound preparation (to make it long, rattan): for the occurrence of serious fields in piglets.
A single dose of diflufenacil and a compound preparation (Mai Xi, Rui Chao Mai): used for serious plots of swine fever and leek.
stable
Due to the large difference in weeding weather temperature after the year, the stability test for herbicides is relatively large.
In the past 2 years, due to the expiration of the registration certificates for many wheat field chemical herbicides, a large number of identical products have appeared. However, the problem with these products is that once the weather and other factors are encountered, the stability of the drug cannot be guaranteed. There is a problem with phytotoxicity.
ruthless
Use the amount of foot medicine, the amount of water in the foot, spray evenly, and dilute to prepare the mother liquor.
After the year, the chemical control of wheat is left to farmers' friends for a relatively short period of time. At the same time, the weeds are relatively old. It is necessary to maximize the control effect. It is recommended that farmers' friends should rationally increase the medicine for different kinds of weeds and weeds of different grass ages. The amount (not blindly expanded and increased), rational compounding for chemical control.
At this time, chemical control should be carried out due to the rapid growth of wheat. At least one acre, one bucket and half water should be guaranteed at the time of application. The mother liquor should be diluted twice to evenly spray to avoid the leakage of the wheat seedlings.
Note: It is forbidden to fight herbicides when wheat enters jointing stage!
More pesticide knowledge , please pay attention to China Pesticide Network
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