Mastering the best time of "143 control" can better control pests and diseases and get twice the result with half the effort. The growth period, occurrence time and damage degree of wheat diseases and insect pests are different in different places, and it is most reliable to carry out "one killing and three prevention" according to the growth situation of wheat. After sowing wheat for three times, sow it once at the dense wool festival (middle and late March), booting stage (mid-April) and heading stage respectively. We should also pay attention to the general prevention and control information of local agricultural departments, which can be rationally deployed according to the characteristics of wheat pests and diseases in various places. If it rains within 3 ~ 6 hours after injection, it should be handled in time. 20 g of 2.5% high efficiency chlorofluorocarbon emulsion 10% mite wet powder for radish, 25 g of 45% wood pulp amine, 8 ml of 98% potassium dihydrogen phosphate 100 g of tundra. It can prevent mites, raspberries and powdery mildew, as well as schistosomiasis, leaf blight, rust and dry hot wind.
4.5% efficient CFC oil 80ml wonderful 10% mite wet powder 20g 50% carbendazim moisturizing powder 80g 98% potassium dihydrogen phosphate 100g. It can prevent mites, monascus diseases, schistosomiasis, powdery mildew, dry and hot wind, etc. 22% worm for radish, 8 ml of high chlorine suspension 15% triadimefon, 70 g of wetting powder 100 g of 98% potassium dihydrogen phosphate. It can prevent mites and powdery mildew, as well as schistosomiasis, red mold, rust, leaf blight and dry hot wind. First of all, wheat is a crop that affects water. Once you see flowers, you will get flour, and you will be injected with flowering medicine to prevent scab. If you carefully observe the color on a sunny day, it will appear yellow first, then yellow and white, and finally white.
After the wheat enters the flowering stage, the number of ears in the filling stage, maturity stage and field is fixed. To obtain high yield, we can consider the method from the number of ears and grain weight. The factors affecting the spike number and grain weight of wheat are very important for the prevention and control of pests and diseases. The sunshine will last for about 3 days, and the temperature and humidity can be extended to 5 days. The peak of wheat flowering is at 9 ~ 1 1 in the morning. Wheat control is the main, the best fourth medicine, and hypermutation is not important. The water content of wheat itself does not need external factors. Different from other crops, it promotes the normal nutrition and formal planting of wheat, and finally achieves high yield.