Rice raining season application in heading stage to prevent two diseases

In the case of continuous low-temperature and rainy weather in rice heading stage, rice blast should be widely used for the prevention and control of rice blast. For susceptible varieties, it should be in the rupture period (10%-15% of the rice rupture in the whole field) and the heading stage (80% tassel in the whole field rice) Take out), two medications. Applicable agents include indole, tricyclazole, and prochloraz. Among them, Dao Ling Ling, tricyclazole and other drugs have strong internal absorption conductivity. Generally, it does not rain for 2-3 hours after application, and the control effect can be guaranteed. From the weather forecast, most of the recent local lightning storms can be sprayed according to the situation. When there is water on the rice leaf after rain, it is advisable to reduce the water consumption appropriately, spray it finely or spray it with a mist sprayer. In this way, the high concentration of the chemical liquid falls on the rice leaves with water, can be diluted twice, and evenly distributed to the foliage, avoiding a large amount of liquid medicine slipping off the leaf surface, affecting the control effect.

To control rice false smut, it should generally be applied about 1 week before the rice breaks. Using Jinggangmycin to control rice false smut, the application effect was best about 1 week before the rice rupture, and it was applied again at the breakage period, and there was almost no control effect. From the experimental demonstrations in recent years and the large-scale production and use of drugs, is it suitable for the prevention and treatment of rice smut? An azole fungicide such as propiconazole or tebuconazole, a copper preparation such as copper high-alkaline copper sulphate or succinic acid copper sulphate, and a reagent such as prochloraz, which are used at the heading stage of rice, and have certain control effects against rice false smut. . One week before the rice break, there is no field for the control of rice smut in the treatment of rice smut. It is conceivable to use the above-mentioned agents to control rice smut at the heading stage.

Excessive use of azole fungicides in rice heading stage, especially in the case of low temperature and rainy rice growth inhibition, may affect rice heading and grain filling, and should strictly control the dosage when applying, and do not blindly increase the dosage. Prochloraz and copper high-alkaline copper sulphate and other drugs have good control effects on rice false smut and rice blast, and the risk of phytotoxicity to rice is normal during normal use. These agents can be used preferentially during rice heading, or Other agents are mixed or used interchangeably.