1. Symptoms: it is mainly harmful to the seedlings of Chlorophytum. At the beginning of the disease, the branch root and fibrous root of Chlorophytum were infected, and then extended to the main root. The leaves in the upper part of the plant wilted. When the disease is serious, the whole plant will die.
2. Control methods: before sowing, the soil of the seedbed should be disinfected to prevent the damage of underground pests and nematodes. When the disease occurs, it can be sprayed or irrigated with 40% rotting plants, or it can be irrigated with 80% of 402 EC. Spray medicine or root once a week until the disease is cured.
1. Symptom: it mainly damages the rhizome near the ground. In the early stage of the disease, there were purple brown water spots on the rhizome, and in the later stage, they gradually spread. The white mycelium layer appeared in the diseased part and nearby soil, causing the plant wilting and withering.
2. Control method: before planting, use formalin to irrigate the soil and disinfect the soil. In the season of frequent occurrence of the disease, the root can be irrigated with thiophanate methyl solution to prevent the occurrence of the disease. In the early stage of the disease, lime powder can be sprinkled around the basin soil. Sprinkle once every 15 days, 2-3 times.
1. Symptoms: most of this disease starts from the old seedlings, and the disease is one month or even longer. At the early stage of infection, the stem turned brown and the leaves became green and drooping. The rapid expansion of the disease caused the whole plant to die.
2. Prevention and control methods: once the disease occurs, it is difficult to deal with, and prevention should be the main way. In the season prone to disease, it is necessary to control soil moisture, provide it with sufficient light and ventilation, and do a good job in prevention and control. It can also be sterilized regularly with drugs. Can use agricultural streptomycin sulfate or can kill spray, or use metalaxyl manganese zinc to plant root irrigation control.
1. Symptoms: mainly harmful to the leaves of Chlorophytum. At the early stage of the disease, the yellow brown spots appeared on the leaves, and at the later stage, the spots gradually expanded. The infected leaves will dry up quickly, and the whole plant will die if it is serious.
2. Prevention and control methods: the disease strains should be pulled out in time and destroyed in a centralized way. When the disease occurs, the leaves can be sprayed with Bordeaux solution for sterilization.
