2019年10月30日星期三

Several fungicides suitable for controlling wheat sheath blight

In order to better control wheat sheath blight, the author selected several new fungicides in 2008 to conduct field trials of wheat sheath blight. On March 17th, before the jointing of wheat (the early stage of the onset of wheat sharp eyespot), the first drug was administered, and the second drug was administered at intervals of 15 days (April 2). The drug solution was 66 kilograms per acre.

The test results showed that each use of 12.5% ​​diniconazole WP wettable powder 60 g, 12.5% ​​of myclobutanil EC 60 g, 10% chlorantrifos EC 30 g, 25% propiconazole EC 48 g water 66 kg Spraying had better control effect on wheat sheath blight. The control efficacy was 79.5%, 76.3%, 65.8% and 63.9%, respectively, which were significantly better than the control agent with 20% Jinggangmycin soluble powder 60 grams per mu. Effectiveness (52.9%). It is possible to use these agents to control sheath blight on the field where the rate of diseased plants is more than 20% from the turn of wheat to the beginning of jointing (the end of February to mid-March). Spraying should be done evenly on the lower part of the wheat plants. Can flow to the base of the wheat plant. Plots with severe conditions are prevented and controlled once every 10 to 15 days.

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