A few days ago, the National Agricultural Technology Extension Service Center summarized the key targets for the prevention and control of plant diseases and insect pests in different parts of the country. The NPPOs at all levels were required to clearly identify the main targets of pests and diseases in the region, and to guide and control sub-regional and sub-crop classifications. Major pest and disease hazards.
Jianghuai, Huanghuai, the middle and lower reaches of the Yangtze River and the single-cropping area in the southwest of China: Focusing on rice planthoppers, timely and effective selection of high-efficiency and low-toxicity fenthrin, pymetrozine, etc. For example, if the water in the field during the yellow ripening period is large enough to cause rice planthoppers, it may be fumigated with dichlorvos. For rice fields with N. lugens as the main population, imidacloprid and its compound preparations should be avoided. In the prevention of rice planthoppers, as appropriate, adding pit stem buds, Jinggangmycin or ketoxacin prophylaxis.
In the middle and lower reaches of the Yangtze River, south of the Yangtze River, and late rice fields in southern China, the prevention and control of pests and diseases such as rice planthoppers, rice leaf roller, rice borer, rice blast, and rice smut are important. For rice planthoppers reaching the target area for prevention and control, high-efficiency, low-toxicity agents, such as fenthrin, pymetrozine, and buprofezin, should be used. The field of rice leaffolders should focus on the protection of functional leaves. South China rice area should prevent large-scale damage caused by returning rice planthoppers and rice leaf roller. For rice blast disease-prone areas and susceptible varieties, two spikes should be applied during rice breakage and heading to prevent panicle blast, such as prochloraz, tricyclazole, stem wax bud, and Bacillus subtilis. In the rice areas affected by typhoons and heavy rains, prevention of bacterial diseases such as bacterial leaf streak and bacterial blight should be done.
North China and Northeast China's main corn producing areas: Must focus on Mythimna separata and big spot disease. In areas with serious corn stickworms, light can be used to attract adult insects and reduce the population of armyworm repellents. Maize large spot disease seriously occurs in the field, by removing the diseased leaves at the bottom of the corn, reducing the relative humidity in the field, and improving plant resistance to disease.
The main corn producing areas in northwestern China: The key is to control corn leafhoppers. When the leaf pods are spotted, they should be immediately treated with pesticides such as avermectin, acetylene, buprenorphine, thiazolyl and imidacloprid. The spray should focus on the backside of the lower middle leaves of corn. Can promote high pole sprayer or sprayer spraying technology.
The main potato production areas in the north: focus on the prevention and control of late blight. During the budding of potato until its initial stage of flowering, two protective fungicides should be sprayed before the onset of rain, such as mancozeb (fully-complexed) and Prosin Zinc. , such as areocynozymide. After the onset of disease, the use of systemic fungicides, such as metalaxyl, propamocarb, and dimethomorph manganese zinc, can be used for spray control.
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