At present, wheat in Jiangsu Province has entered the jointing stage one after another. Due to factors such as precipitation in the spring and good soil moisture in the field, some of the fields in Huaibei area have risen rapidly, which is obviously heavier than the same period of last year. With the transformation and upgrading of wheat seedlings, the degree of canopy closure in the field will increase, and wheat sheath blight will increase. Local governments must strengthen monitoring and early warning, timely release technical opinions, and scientifically organize prevention and control to ensure that the damage of sheath blight is minimized.
1 Overview
According to the survey in early March, the recent disease of sheath blight has risen rapidly, and some fields have reached the control index. The average disease rate of the field in the province is 4.3% (0-100%), slightly higher than the same period last year, along Huaihe and Huaibei. The rate of diseased plants in the high field is over 50%, and the incidence is significantly heavier than the same period last year.
The morbidity rate in Xuzhou City was 51.9%, and the average diseased plant rate was 8.6% (0-100%), which was significantly heavier than 5.3% in the same period of last year. The average disease rate of dry buckwheat was 11.2%, and the average disease rate of rice buckwheat was 5.6. %. The rate of diseased land in Yancheng City was 28.7% (0-65.8%), and the average diseased plant rate was 0.7% (0~34.2%), which was lower than 1.8% in the same period of last year. According to the Wuxi survey, the morbidity rate reached 53.3%, and the average disease rate was 11.8% (0 to 48%), which was higher than 7.8% in the same period of last year. The average disease rate in Zhenjiang, Yangzhou, Lianyungang, Suqian, Taizhou, Nantong and other places is 2% to 4% (0 to 58.3%), which is basically the same as last year. Suzhou, Changzhou and other places are sporadic.
2 Prevention opinions
As the wheat enters the jointing stage, the field group will further increase, and the recent temperature gradually rises, the degree of canopy closure in the field gradually increases, and wheat sheath blight will enter the peak period. It is imperative that all localities strengthen monitoring and early warning, strengthen classified guidance, organize prevention and control in a timely manner, and scientifically win the first battle against wheat pest control.
The first is to strengthen monitoring and early warning. According to the requirements of the measurement and reporting standards, we must do a good job in systematic investigation and field census work, accurately grasp the development trend of the disease, promptly submit the information on pests and diseases through the “Jiangsu Province Agricultural Pest Monitoring and Early Warning Systemâ€, and issue early warning information in time for correct development. Provide scientific basis for prevention and treatment.
The second is to strengthen the classification guidance. It is necessary to make full use of channels such as television, internet, radio, newspapers, 12316, and rural information and communication to carry out propaganda and launch in all directions to improve the information availability rate. In the critical period of prevention and control, it is necessary to organize the majority of agricultural technicians to go deep into the fields and guide farmers to carry out appropriate prevention and control for different types of fields and improve the control effect.
The third is scientific organization and prevention. It is necessary to adhere to the appropriate prevention and control, and timely carry out chemical control on the field with a disease rate of 5% to 10%; to select the appropriate drug, a single dose or compounding agent such as tebuconazole, hexaconazole or Jinggangmycin may be used. To use sufficient water, the water consumption should not be less than 50 kg/mu, and apply to the base of the wheat seedlings when the morning dew is not dry or in the evening; for the re-emergence of the field, after the first control, it will be carried out 7 to 10 days later. The second prevention.
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