Symptoms: the disease mainly damages its leaves and stems. At the beginning of infection, the leaves appear brown. At the end of infection, the leaves and stems will show spots. It will also cause the leaves to twist, stop the growth of the plants, and eventually die.
Prevention and control: at the beginning of the disease, a little chlorothalonil can be sprayed, which is difficult to remove at one time. It needs to be sprayed many times, and can be sprayed once every 7 days, so as to control the occurrence of insect pests.
Symptoms: most of them occur on the leaves of Narcissus. At the beginning, there will be some yellow spots. At the later stage, they will spread out in a fan shape. There will also be yellow halos around them. At the later stage, the leaves will dry up and there will be black particles.
Prevention and control: before planting, it is necessary to peel off the dry scales outside, and then wash them with disinfectant solution for 2-3 times for prevention and control. If the disease is found, the diseased leaves need to be cut off in time.
Symptoms: this disease mainly damages its leaves and flower stems. When it first occurs, there will be yellow brown stripes on it. In the later stage, there will be blister bulge, which eventually causes the skin part to break and brown, and finally causes wilting.
Prevention and control: if disease is found in the process of maintenance, the sick plants can be removed and destroyed in time.
