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1.病害死苗原因分析:主要由于播种前苗床土、营养土未消毒或消毒不彻底,出苗后没及时喷药,以及苗床温、湿度管理不当等,从而引起猝倒病、立枯病发生。防治措施:1按每立方米苗床用50%多菌灵8~10克或绿亨一号1克,与适量干细土混合均匀撒于畦面,翻土拌匀后播种。配制营养土时,每立方米营养土中加入50%多菌灵80~100克或绿亨一号5克,充分混匀后填装营养钵。2幼苗75%出土后,喷施50%多菌灵500倍液杀菌防病,以后7~10天喷一次,适时揭盖草帘通风换气,防止苗
1. Dead seedling disease analysis: mainly due to sowing before sowing soil, nutrient soil is not disinfected or disinfected is not complete, did not promptly spray after emergence, and seedbed temperature, humidity, improper management, etc., which led to damping off disease, damping off occurred . Control measures: 1 per cubic meter of seedbed with 50% carbendazim 8 to 10 grams or 1 gram Green Hang, mixed with the right amount of dry fine soil sprinkle evenly in the noodles, soil mixed and sown. Preparation of nutrition soil, the nutrition soil per cubic meter of 50% carbendazim 80 to 100 grams or 5 grams of a green Hang, fully filled and filled nutrition bowls. 2 seedlings 75% unearthed after spraying 50% carbendazim 500 times bactericidal anti-disease, spray after 7 to 10 days, timely cover straw curtain ventilation, to prevent seedlings