Department of Plantation Management of the Ministry of Agriculture and Rural Affairs: Guidance on Prevention and Control of Wheat Scab in 2018

Wheat scab is a common disease in the wheat producing areas of China. The occurrence of the epidemic not only directly causes loss of yield, but also the mycotoxin (DON) produced after the disease contaminates the grain, which leads to the decline of wheat quality and even loss of edible or forage value. Based on the analysis of factors such as the source number, variety resistance, climatic conditions and wheat growth in the field, it is expected that the wheat scab in 2018 will be re-emerged in the wheat areas of the Yangtze River, Jianghuai and Huanghuai, and the northern part of Huanghuai and parts of North China. There is also a moderate risk of prevalence in the district. In order to promote scientific prevention and control and ensure the safety and quality of wheat production, the Agriculture and Rural Crop Production Management Department and the National Agricultural Technology Extension Service Center organized relevant experts to conduct special research and put forward the following prevention and control guidance.

First, the prevention strategy

Focusing on promoting the structural reform of the supply side of agriculture, taking green development as the main line, improving the government-led, territorial management and prevention and control mechanisms, and implementing district policy, classification guidance, scientific drug use, and unified defense. Changfa District adheres to the "active attack, see flowers and fight drugs" unshakable, grasping the critical period of wheat heading and flowering, comprehensively spraying high-efficiency on the prevention of road chemicals, and reducing the degree of disease damage. The incidental area insists on “based on prevention and timely medication” and does not relax. Once the wheat is in the flowering stage, it will be organized and controlled immediately to reduce the risk of disease epidemics.

Second, prevention and treatment technology

On the basis of scientific fertilizer and water management, Qinggou and other agricultural prevention and control measures, it is an important measure to control the occurrence of wheat scab and reduce toxin pollution in the timely period. In order to improve the effectiveness of prevention and control, all localities should strive to achieve "four adherences."

(1) Adhere to the appropriate use of drugs. The wheat from the ear to the early stage of flowering is the best time to prevent and control the occurrence of wheat scab. The Changjiang River Basin, the Jianghuai River, the southern part of Huanghuai, and other areas in Changfa, fully implement the "seeing flowers and fight drugs" pesticide prevention measures, such as continuous rainy weather, long-term condensation and other suitable disease epidemics, should be 5-7 days after the first dose of medicine Apply the drug for the second time. In the accidental areas such as the northern part of Huanghuai and North China, once the climatic conditions for the disease occur, the wheat flowering period should be seized and the drug should be prevented in time.

(2) Adhere to rational drug selection. It is the key to ensure the prevention and control effect by selecting the type of the agent and the effective dose. It is preferred to use cyanolide, tebuconazole, prochloraz and other pharmaceutical preparations and their compound preparations, especially in areas where the pathogens of the middle and lower reaches of the Yangtze River, Jianghuai, and Huanghuai have developed resistance to carbendazim. Carbendazim and its compound preparations are used with caution. As far as possible, use ultra-fine powder and suspensions that are resistant to rain. At the same time, pay attention to the rotation of drugs, the second prevention and treatment should use the same variety of agents to prevent and control the different mechanisms of action, in order to delay the emergence of drug resistance, improve the control effect, reduce mycotoxin contamination.

(3) Adhere to scientific application of medicine. The selection of efficient application equipment, suitable additives and stabilizers is the basis for ensuring the effectiveness of prevention and control. It is recommended to use self-propelled wide-format application machines, hot fog machines, motorized misters, electric sprayers, drones and other application machines. Stretcher sprayers should be avoided as much as possible. Use a small-aperture nozzle spray as much as possible, and add the corresponding functional additives to ensure the proper droplet size and uniform distribution of the liquid. The spray of the mobile mist spray machine should be controlled within 2/3; the hot fog machine should be used with the stabilizer; the drone, especially the multi-rotor drone, should be added with a settling agent.

(4) Adhere to a multi-effect. The wheat earing stage is the prosperous period of various diseases and insects of wheat. All localities should focus on the prevention and control of wheat scab, adapt to local conditions, rationally select and scientifically mix and control the anti-control agents, and take care of stripe rust, powdery mildew, larvae, mites, etc. Major pest and disease prevention and control. At the same time, pay attention to the combination of disease prevention and treatment of pests and control of prevention and control, and promote the use of medicines and fertilizers to promote the weight gain of preserved grains.

In addition, the wheat should be harvested in time, dried and dried during the ripening period, so as to prevent the wheat grains from being affected by excessive moisture or excessive humidity, causing the bacteria to reproduce and produce toxins.

Third, prevention and control measures

The prevention period of wheat scab is short and time-sensitive, and requires a high degree of organization. All localities should give full play to the administrative advantages, the advantages of the agricultural sector, the technical advantages of plant protection institutions, and the service advantages of specialized prevention organizations. “Four enhancements and four guarantees” will comprehensively improve the effectiveness, efficiency and effectiveness of prevention and control.

(1) Strengthen organizational launch. Party committees, governments and agricultural departments at all levels must fully understand the great significance of prevention and control of wheat scab, strengthen organizational leadership, increase financial support, refine work plans, arrange deployments at an early stage, implement responsibilities at all levels, and strengthen supervision and inspection. Ensure that the disease is not widespread due to the lack of organization and prevention and control.

(2) Strengthen monitoring and early warning. Plant protection agencies at all levels should encrypt monitoring and investigation, comprehensively grasp the situation of the seedlings, disease, and public opinion, pay close attention to the weather changes, timely analyze the epidemic situation of the consultation, accurately publish the forecast and warning information, and clarify the best prevention and control period, key prevention and control areas and The key prevention and control of the field will ensure that the monitoring and investigation is not in place and the forecast and warning are not timely, resulting in the missed optimal prevention and control period.

(3) Strengthening the rule of unified defense. Give full play to the role of central and local governments in supporting agriculture, and through the government to purchase services and issue prevention and control subsidies, etc., actively support the development of specialized prevention and treatment service organizations, vigorously promote professional and unified defense, promote large-scale unified prevention and control, and effectively improve prevention. Control the degree of organization and scientific level, ensure the effectiveness of prevention and control, and promote the reduction and increase of pesticides, and the use of zero growth.

(4) Strengthen supervision and guidance. During the critical period of prevention and control of wheat scab, the cadres and technicians of the organization were dispatched, and the tablets were packaged and packaged. The main wheat producing areas and the scab recurrence areas were inspected, the progress of prevention and control was supervised, and technical guidance was carried out to ensure prevention. The control work measures were put in place and the technical measures were implemented.

This website: Department of Plantation Management of the Ministry of Agriculture and Rural Affairs: Guidance on Prevention and Control of Wheat Scab in 2018

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