Symptoms: there will be many spots on the leaves at the beginning of the disease, which will gradually turn yellow or brown, and then yellow mucus will appear on the bulbs, and then start to rot.
Prevention and control: before planting, it is necessary to select a robust seed ball, and disinfect the seed ball and soil before planting. After the onset of the disease, carbendazim should be sprayed every 2-3 days, and it can be relieved after 3-5 times.
Symptoms: the disease is located in the bulb, and then it will gradually move up, and then the leaves turn yellow and yellow spots appear, affecting the whole growth.
Prevention and control: before planting, it is necessary to select aseptic seed ball, disinfect basin soil in advance, and if any sick plant is found, timely treatment is required to remove the diseased leaves.
Symptoms: at the beginning of the disease, the tip part of the leaves will change color, leading to the wrinkle of the leaves. If the surrounding temperature is too wet, it may also lead to the decay of the flower stem part. At the later stage, when it is serious, there will be gray sclerotia on the leaves.
Prevention and control: when the diseased leaves are found, they need to be removed in time to reduce the source of infection. In addition, chemicals need to be sprayed. Bordeaux solution is more suitable, which can be sprayed with water. It is difficult to remove at one time, and it needs to be sprayed 2-3 times.
