Q: Can the drug thiazolamide, which is used to control rice sheath blight, prevent rice smut?
Q: Can tilfuramide be used to prevent rice smut? Is hexaconazole and benzoylpropanazole possible?
A: Thiofuramide is a highly effective and applicable drug for controlling rice sheath blight. It also has certain control effect on rice false smut. At present, a single dose of thiafuramide is registered for rice control of rice smut, such as Jiangxi Zhonghe Chemical Co., Ltd. and Hebei Sannong Agricultural Chemical Co., Ltd., 240 g / liter of thiofuramide suspension for the control of rice smut The recommended dosage of pure drug per hectare is 45-81 grams and 45.3-81.5 grams, respectively. According to the relevant tests, 22.5 grams of 240 g / liter of thiofuramide suspension per acre were used 5 to 7 days before the rice break and twice at the beginning of the ear, which had certain control effect on rice false smut, and the control effect was inferior to that of epoxiconazole. , tebuconazole and other drugs.
Rice rice smut disease is not re-treated, and it is difficult to treat with drugs after onset. Prevention of high-efficiency drugs 5 to 7 days before the rice break is the key to control rice false smut. Applying thiafuramide to control sheath blight 5 to 7 days before the rice break, it has a certain effect on the rice smut. In order to ensure the control effect on rice false smut, it is advisable to add hexaconazole, tebuconazole and other drugs, or to use a mixture of thiafuluamide and these drugs.
At present, there are a mixture of thiafuluamide and epoxiconazole, tebuconazole, azoxystrobin and other drugs, which are registered for rice control of rice false smut. Shaanxi Thompson Biotechnology Co., Ltd. 30% thiofuran epoxiconazole suspension, containing 10% thiazolamide and 20% flucyclazole, registered for the control of rice sheath blight and rice smut, recommended dosage per hectare Both are 90-135 grams, equivalent to 20-30 grams per acre of preparation, equivalent to 2 to 3 grams of thiazolamide pure drug per acre, 4 to 6 grams of flucyclazole pure drug. Luzhou Xingu Biochemical Co., Ltd. 45% of thiafur azoxystrobin suspension containing 20% ​​of thiafuramide and 25% of azoxystrobin, registered for the control of rice sheath blight, rice smut and rice blast, per hectare The recommended dosage of pure medicine is 135 ~ 168 grams, about 20 ~ 25 grams per acre of preparation, equivalent to 4 ~ 5 grams of thiazolamide pure drug per acre, 5 ~ 6.25 grams of azoxystrobin. 30% of thiofuranyl tebuconazole water-dispersible granules, containing 20% ​​of thiafufamide and 10% of tebuconazole, registered for the control of rice false smut and sheath blight, per hectare of pure medicine The recommended dosage is 67.5-90 grams, which is equivalent to 15-20 grams of preparation per acre, equivalent to 3 to 4 grams of pure drug of thiafuramide per acre, and 1.5 to 2 grams of pure drug of tebuconazole.
Hexazol and benzazole are high-efficiency drugs for the control of rice false smut, and moderate application has better control effect on rice smut. Note that the amount of foot medicine is generally about 6 grams per por of hexaconazole and 9 grams of benzazole.
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(Source: Pesticide Newsletter)
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