How to deal with calla lily rotten roots
As a popular ornamental flower, calla lilies are popular for their elegant flower shape and fresh temperament. However, many flower lovers have encountered problems with rotten roots during the maintenance process, which not only affects the quality of flowering, but can even lead to the death of the entire plant in severe cases. This article will systematically analyze the causes and coping strategies of calla lily root rot to help you regain a healthy plant. 1. In-depth analysis of the causes of calla lily root rot 1.1 The infection characteristics of root rot When the disease occurs during the bud bud stage, brown lesions will gradually appear on the edge of the outer leaves, and the disease spots will spread to the center in a wavy shape, eventually leading to complete decay of the base of the pseudostem. Infection in the full flowering period is characterized by browning of the top of the flower, and the disease invades downward along the pedicels, forming a hollow rotten structure. 1.2 Environmental pathogenic factors Soil hardening and poor drainage are the main reasons. When the substrate water content continues to exceed 60%, pathogens such as Fusarium reproduce rapidly. Data shows that in a high-humidity environment of 28-32 ° C, the bacterial reproduction rate is three times higher than that at room temperature. 2. First Aid Guidelines for Calla Lilies Rotten Roots 2.1 The first step of four-step treatment of diseased plants: Remove all soft rot tissues and retain healthy bulbs. Step 2: soak in warm water at 50℃ for 1 hour to sterilize, or use 0.1% acetic acid solution to disinfect for 15 minutes. Step 3: Leave it in a cool and ventilated place for 48 hours until the incision scabs. Step 4: Replace the sterilized substrate and re-colonize it, which is recommended to carry out 15 days in advance to ensure the growth cycle. 2.2 The soil treatment plan uses high-temperature steam sterilization to treat the basin soil, and keeping it at 80 ° C for 30 minutes can kill 99% of the pathogens. It is recommended to use a mixed substrate of peat soil: perlite: vermiculite =5:3:2, and mix with 50g of Bacillus subtilis biological agent per cubic meter. 3. Prevention system for calla root rot 3.1 Seed selection criteria Select healthy seeds with a circumferential diameter of ≥14cm, and the epidermis should be intact and free from mechanical damage. Soaking in 1500 times solution of 25% azoxystrobin suspension for 20 minutes before planting can significantly reduce the incidence. 3.2 Scientific maintenance points recommend using pottery pots with a diameter of more than 25cm, and maintaining the thickness of the substrate layer of 15-20cm. Following the principle of "seeing dry, seeing wet", watering every 3 days in summer and extending to 7-10 days in winter. Outdoor maintenance requires building a rainproof canopy to ensure that the air humidity is ≤70%.
Through systematic prevention and control measures, the cure rate of calla lily root rot can reach more than 85%. Regularly check the plant base state, find early symptoms immediately, with scientific water and fertilizer management, will be able to let your calla lily restore graceful posture.