This kind of pathogen mainly erodes the upper and lower surfaces of leaves, and a small part of it can appear vesicles in the stems, which contain the yellow series of powdery substances. Although the disease is not fatal, it will weaken the growth of plants. When you meet it, you should also deal with it in time. Once you find it, you should first cut off the diseased leaves, and then spray it with the configured dose of zinc Daisen powder.
This disease often occurs in redundant seasons. When it first appears, the base of the leaves will be covered with white filaments, but don't underestimate it. This disease may cause the whole rhizome to rot. The stem skin of the infected plant will change color slowly. Once the infected plant is around the stem for a week, it may cause the whole plant to die, so it is necessary to prevent and control early. After discovery, first remove the basin soil with disease, then do ventilation and light transmission treatment for the environment, pay attention to drainage, in case of serious case, the whole plant may be burned
This kind of disease is likely to exist all year round, especially in the hot season, plus the rainy season, it is more likely to occur. The disease extends from the tip of the leaf to the rhizome. If it is serious, it can cause the whole plant to die. First of all, in the maintenance, we should actively improve its polygonatum, and second, if we find disease, we should take medicine spray, no 7-10 days a continuous 3-5 times can improve.
This bug is also common in other plants. If the air flow around is not good, it will be more serious. Because the environment of high temperature and humidity is very suitable for growth, when encountering this insect, you can brush it off manually, and then spray the corresponding chemical control
