1. Corruption disease

In fact, it is a disease of bacterial infection. It starts to happen as soon as the seedlings come out, which is generally more severe from February to March. When it happens, first harm the base of the leaf sheath, the color is reddish brown, and then the whole leaf will begin to turn yellow. Then it will harm the underground bulbs, and the fibrous roots will slowly change from white to light brown or purple black, and finally fall off and die

Control method: first, we can soak the seeds with a certain amount of lime water before planting, and then wash them off with clean water. If some sick plants are found during plant growth, we need to pull them out in time and disinfect them. In addition, it is best to spray some pesticides at the seedling stage

2. Rot disease

The disease is also caused by bacterial infection. It mainly causes damage to leaves and bulbs. As a result, the leaves turn yellow and fall off, and the bulbs turn black and rotten

Prevention and control methods: spray with some chemical reagents before sowing to do the most basic prevention and control work. Then use other pesticides to strengthen control in the later stage

3. Viral disease

Once suffering from this disease, the leaves will begin to curl, the color will begin to change from green to yellow, and some miscellaneous flowers and spots will appear, resulting in leaf deformity and poor growth

Prevention and treatment methods: first of all, when sowing, we should select some bulbs without disease for planting, so that the probability of disease will be smaller. Then in the later stage, some drug prevention and treatment can be carried out, so as to reduce the chance of virus transmission

4. Robin root mite

It is mainly harmful to the bulb of the plant, which seriously hinders its growth and development

Prevention and treatment methods: before planting it, we can soak it with some drugs, and then plant it after soaking, so as to have an effective prevention and treatment effect