According to the case and security Announced on March 22 WeChat: What are the drug types for preventing and treating wheat scab? What are the most effective drugs for both prevention and treatment?
Fusarium head blight is difficult to prevent, and the effect of drug control after the onset is very poor. For the first time in the production of drugs for controlling wheat scab, you can master the principle of “see flowers when you hitâ€, and when the wheat begins to bloom in the field (5% to 10% of the young plants), use the medicine. The use of medication is delayed and the effectiveness of treatment is reduced. Wheat heading, flowering and rainy days or varieties susceptible to disease, the first time after the application of pesticide control interval of 5 to 7 days. If the heading date of wheat is too heavy and rainy days, there is a prevalence of head blight, and spraying should be delayed sooner rather than later, when it is fine or when wheat is sprayed, spraying should be repeated before rain or in the rain gap. The first application time of pesticides with good systemic absorption and long duration can be advanced to the earliest stage of wheat earing. Farming large households should rationally arrange the application time according to the size of the crop. When there is rain during the heading period, the pesticide should be plucked before the rain, so rather than late. In recent years, the Jiangsu team of Jiangsu Longdeng Chemical Co., Ltd. promoted 30% fentanyl carbendazim suspension of Longgan Fulian to prevent and control wheat scab, it is recommended that farmers use 10% to 30% of the head of wheat to extract (break). One drug, after 7 days of prevention and control, achieved good control effect.
Applicable to the control of wheat scab disease drugs cyanoxuron, tebuconazole, carbendazim, thiophanate-methyl, prochloraz, nymphaclide and so on. In Jiangsu, Anhui, and other places, Gibberella spp. has a high level of resistance to carbendazim, so it is not appropriate to use carbendazim or polyketone to control scab, and cyanogenin and tebuconazole should be used. The mixture of oxazolol, tebuconazole and carbendazim, prochloraz, and thimethoxime was used as a compounding agent, and attention was paid to the use of a uniform amount of the tebuconazole and even spraying of the water.
In the existing agents for controlling wheat scab, cyanocaverins and their mixed agents have relatively good therapeutic effects on wheat scab, which can effectively inhibit the infestation of pathogenic bacteria and produce DON toxin and reduce the incidence of wheat. ,reduces the toxin content in the grain. In the years when the head blight occurred, in the early stage of wheat ear disease, about 25% cyanocaverate suspension agent was used in a timely manner to prevent and control about 150 ml, which can better control the development of the disease. The treatment of the scab in the middle and later stages of the scab was poor.
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