Breeding techniques of Cymbidium to control bacterial soft rot of Cymbidium

Bacterial soft rot is a common disease in Cymbidium. It is caused by bacteria overwintering in the diseased body or soil, invading from the wound and transmitted by Rain Water and irrigation. Magnolia can be infected many times during the growing season, and the incubation period is 2mi for 3 days, mainly harmful to leaves and stems. In the early stage of the disease, dark green water-immersed disease spots emerged in the leaves, the diseased tissue turned brown, soft rot, gradually expanded and spread, and finally dried up and sunk, and all the leaves sagged. The disease of the stem makes the stem soft rot, resulting in the lodging death of the plant. The disease is usually the most serious from June to August, which will aggravate the occurrence of the disease under the conditions of high temperature and humidity, excessive application of nitrogen fertilizer, improper irrigation, poor ventilation and light transmission, serious damage caused by shell insects and so on.

Control methods: reduce plant damage as much as possible, control shell insects and other pests in time, strengthen management, avoid pouring water into the heart leaves of Magnolia, avoid rain in summer, and use new soil when changing pot soil. At the initial stage of the disease, 95% carbendazim was sprayed, or 1000 times of agricultural streptomycin was used to smear the diseased plants, and the contaminated or used flowerpots and tools were disinfected with 40 times formaldehyde. Cai Hongxia