The application period for wheat herbicides is: wheat seedling stage (mid-to-late November) and greening stage (late February to early March), the temperature is above 10 degrees, and the average daily temperature is not lower than At 5 degrees Celsius, there are two stages of wheat herbicide application, one is the seedling stage of wheat before the new year, and the other is the regreening stage after the new year. The benefits of applying herbicide before the new year are as follows:
1. The weeds were smaller a year ago, and the wheat seedlings were basically not blocked. In this case, the weed area was increased, and the weed resistance was also poor, so the weeding effect was ideal.
2. Less medication was used before the year than after the year. For example, a plot of one acre of land before the year could only be rated about 7 points after the year, which saves costs.
3. Under the same conditions, the control effect of malignant common weeds in wheat fields, such as pigweeds, wheatgrass, oats, brome, etc., is better before the year than after.
Extended information:
1. Herbicides refer to chemicals that can completely or selectively kill weeds. They are also called herbicides and are used to eliminate or inhibit plant growth. a type of substance.
2. Commonly used varieties are organic compounds, which can be widely used to control weeds, weeds, and weeds in farmland, orchards, flower nurseries, grasslands and non-cultivated land, railway lines, rivers, reservoirs, warehouses, etc. Trees and other harmful plants.
3. Strictly control the sensitivity of crops to herbicides. Different crops have different sensitivities to herbicides. If the herbicides are not selected according to the sensitivity of the crops to herbicides, even if the herbicides used are safe for crops, phytotoxicity may sometimes occur. Generally, herbicides used to control broadleaf weeds are sensitive to dicotyledonous crops, while herbicides used to control grassy weeds are sensitive to grass crops.
4. Strictly control the crop sensitive period and pesticide application period. Crops have different sensitivities to pesticides and fungicides at different growth and development stages, and even more different sensitivities to herbicides.
5. Strictly control the dosage and concentration of herbicides. The selectivity of herbicides is the selectivity within a certain dosage range, so even a selective herbicide will cause phytotoxicity to crops if it exceeds the prescribed dosage range.
6. Strictly use herbicides. The methods of using herbicides include stem and leaf treatment, soil treatment and herbicidal film weeding.
Baidu Encyclopedia_Herbicide