According to the reader, this is an anisidine root rot disease. The root rot of fennel mainly occurs at the seedling stage, and the adult plants can also be affected. The onset of seedling stage causes the seedlings to die of yellow wilting, and the roots and rhizomes become brown and necrotic. At the adult stage, first the external leaves wilted, after which the whole plant died of wilting; the roots and roots became discolored and the disease was mostly red-brown to yellow-brown necrosis at the beginning of the disease. After that, it developed brown to dark brown rot and was easy to pull up. A small amount of pink moldy material was found on the site, and died severely when it became serious, resulting in the lack of seedlings and ridges. Root rot of fennel is a disease caused by fungi. Pathogens can invade from root wounds, and use rain water, watering, or management to spread; high temperature and high humidity are easy to cause disease. Heavy smashing, uneven soil preparation, and application of unripe organic fertilizers are easy to cause disease. There are underground pests. The damage caused by root damage is heavy. Control methods: 70% Chloromymidine 3000 times solution or 6.25% Chromium ferrocyanide 1500 times solution or 51% dexamethasone Chlorophyllin 1000 times solution (add agricultural vigor 750 times solution) spray, spraying 3-5 days One can effectively control the occurrence. Azimuth Lights,strong light explosion-proof orientation light,explosion-proof orientation light,Azimuth Lights color joho(HK) Technology Co. , Ltd. , https://www.joho-safety.com
Fennel root rot