When is it good to control wheat scab?

When is it good to control wheat scab? Please guide the pathogen of scab is generally on the high side, mostly exceeding the pandemic index. Once the epidemic occurs, it will not only seriously affect the yield of wheat, but also lead to the loss of wheat utilization value. It is observed that under the condition of drought, most wheat varieties are vulnerable to scab. In particular, the plots with high water and fertilizer are more likely to occur more frequently, and some new wheat varieties are more seriously infected. Scab can not only affect wheat yield, but also cause wheat grain spoilage, and the toxins secreted by the disease bacteria can also cause human and animal poisoning. Wheat scab is a disease that is difficult to control thoroughly. Most farmers do not choose disease-resistant varieties when sowing, and if they do not control them in time, they will suffer great losses. According to the observation in the past two years, wheat scab rarely occurs from jointing to booting stage, and mainly harms wheat ears from heading to full flowering stage. During this period, the temperature is relatively high, so it is very popular. Most farmers know little about scab and do not pay enough attention to the prevention and treatment, so it is difficult to find it without careful observation at the initial stage of the disease. If it is not controlled in time, if it suffers from continuous rainy weather in full bloom, a large number of withered ears will appear in the field within a few days, and it is also difficult to control by spraying medicine. However, the disease in the wheat field with timely control was obviously lighter. Due to the short control time, when you see a few glumes on the wheat spike white and dry, and when there are red spots, you should spray control in time. According to the change of the weather, it is better to be early than late. Because wheat scab is a fungal disease, 100 grams of carbendazim per mu or 50 grams of dilute azolol (grazoli) and 30 kilograms of water per mu are sprayed from the flag of wheat heading to the early stage of heading. The effect is better. As scab is mainly harmful to wheat ears, it is necessary to use atomized sprayers and raise the spray rod as high as possible, focusing on spraying ears to make wheat ears receive medicine evenly, and according to weather conditions, the interval is up to 7 days. the second control was carried out when the wheat was full-spiked and flowered in large quantities. If the weather is continuous overcast and the disease is serious, it still needs to be controlled once at the initial stage of wheat filling in order to achieve a better control effect. It is observed that if the wheat is controlled only once from heading to filling stage, a large amount of spraying can not achieve a better effect. Therefore, the author suggests that farmers must seize the opportunity in prevention and control. Click to get more wheat planting technology click to get more grain planting technology