Wheat scab is an epidemic disease that poses the greatest threat to the safety of wheat production. Its occurrence and prevalence is closely related to meteorological conditions. Continuous rainfall during heading and flowering is the primary condition for its occurrence. In 2019, the continuous rainfall in summer in our province caused the prevalence of wheat scab. At present, wheat in our province is about to enter the flowering period of the most susceptible disease, which is also the key period to prevent wheat scab. The meteorological department predicted that there was more rainfall in our province in late June and July, which was conducive to the occurrence and prevalence of wheat scab. Wheat scab can be prevented but not treated. Wheat planting areas should pay close attention to the local weather forecast, adjust measures to local conditions, guide farmers to seize the key period of heading and flowering, and actively take preventive measures to effectively control the occurrence and harm of wheat scab.
Prevention and control suggestions:
On the basis of strengthening fitness cultivation, grasp the key period of wheat heading and flowering, so as to see flowers and apply medicine, take the initiative to prevent and curb the epidemic of diseases. For highly susceptible varieties, if it is predicted that there will be continuous cloudy and rainy weather for more than 2 days during the flowering period of wheat, the first application time should be advanced to the break heading period. Bacillus subtilis and Jinggang can be used as control agents? Bacillus cereus, cyanoenyl ester, prochloraz, tebuconazole, thiram, thiophanate methyl, etc. If the epidemic situation of the disease is severe, after the first prevention and control, spray once to twice every 5 to 7 days to ensure the prevention and control effect.