Rice blast is one of the major diseases in rice production. In the late stage of rice growth, panicle blast, branch stem borer and grain borer (collectively referred to as “three ridgesâ€) are prone to occur, and the yield is reduced by 1 to 30%, while the weight is reduced by 5 ~ 70%. The "Sankei" must be prevented and treated early, and after taking obvious symptoms, it would have little effect. After many years of practice, we believe that the "three evils" must be controlled through "four lookes." One can see that the new two-line hybrid rice combination Liangyoupeijiu and 65936 are resistant to rice blast and can be controlled without pesticide application. Three-line hybrid rice combinations Shanyou 63 and Teyou 559 also have certain resistance. Some species that have been seriously planted for a long time, such as fragrant blood stasis, Taihu Lake, and Yanjing 187, are generally susceptible varieties, while Wuyujing No. 3, Zaofeng No. 9 and Wuyunjing, etc. With the increase in the number of years of planting, the resistance has also been severely reduced. We must beware of the occurrence of the "three evils". Second, we can see that there are many physiological races of rice blast disease in low-level fields, cold-sweeping fields, and fields with relatively serious incidence in previous years. Breeding rice in these plots can easily lead to the onset of susceptible varieties, and even disease-resistant varieties can develop disease. Special attention should be paid to early application of pesticides. Thirdly, the resistance of the rice to the “three pods†is related to the resistance of the cultivar itself. It is also related to the growth of the population. Over-application of nitrogen fertilizers in paddy fields, long-term deep-water irrigation, over-emergence of seedlings, over-shadowing of groups, and broad-leafed leeches make it easy for germs to spread and spread. This kind of plots need to prevent and control the “three tricks†as soon as possible. The weather at the heading stage during the heading period is the peak period of the “three quails†and is also a dangerous period that affects rice production. If continuous and rainy weather occurs during this period, it is very prone to outbreak of "three evils" and prevention and control must be strengthened. The disease-resistant varieties encounter continuous rain at the break and heading stage, and must be controlled by pesticides; the diseased varieties must be controlled by spraying when the plots are planted in the past years; the plants that have grown too vigorously and have experienced the early emergence of seedlings and leafhoppers should be applied early. Drug control. The agent may be 40% rice bran, 120-150 g per mu; or 20% tricyclazole, 100 g per mu; or 45% compound tricyclazole, 100 g per mu. The amount of water per mu is 40 kg of mobile mist, or 60 to 70 kg of manual spray. China Agricultural Network Editor
Ningxia Zhongqing Agricultural Technology, Co.Ltd was funded on 2004 with 10 Million RMB registered capital. We provide primium melons, vegetable, breeding and promotion services. We have 1800 copies of primium melons&vegetable breeding materials and seed production and identification bases in Shandong, Guangxi, Gansu, Liaoning provnince. We have built "Zhongqing No.5", "Shangdao NO.1", "Tianmi Cuili" etc water melon and muskmelon seeds, of which "Shangdao No.1" is awarded with National Intellectual property protection certificate of Ministry of Agriculture.And some Shamo Green Vegetables for hongkong in Yinchuan,such as: tomatoes, watermelon, melons,ect.
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