There are four causes of celery root rot: celery wilt: seedlings grow slowly after infection, and wither or die in severe cases. Adult plants are prone to illness; Root rot of celery: it mainly harms the root and stem base, and the plant withers and dies, which is easy to pull out; Grey mold of celery: it often occurs from rhizome at seedling stage, and the whole celery rots; Celery black rot: it mainly damages the roots and petioles, and the later fracture exposes the subcutaneous infected tissues. So how to prevent celery from rotting roots?

Control measures of celery root rot

Control measures of celery root rot

1. Carry out two-year rotation on the seriously ill plots of continuous cropping, combine with deep ploughing, thoroughly clean up the sick and disabled bodies after harvest, eliminate the germs, remove the diseased plants in time during cultivation, eliminate the germs, strengthen field management, rationally arrange the cultivation density and prevent the stems and leaves from being covered. Drainage in time when it rains in rainy season to prevent rainwater from flowing into the shed. Water can't be flooded, so it should be ventilated in time to eliminate moisture.

2. Chemical control: bactericide can be sprayed during the onset period, and 40g of mixed 15kg of water is used for one acre of land, generally spraying 1 time every 7- 10 days and continuously spraying for 3-4 times. The control effect is better.

skill

1. Fungicides should not be mixed with alkaline pesticides and biological agents to prevent phytotoxicity.

2. Pay attention to the weather when spraying, avoid high temperature and rainy season, and try to choose morning or evening.