1、 Botrytis cinerea

Symptoms: daffodils infected with the disease will cause the roots below to become soft and rotten, resulting in a gray layer of mold on the surface

Prevention and treatment: this disease is mainly infected during storage. It is necessary to ensure that the storage place should be dry and well ventilated. Before storage, the bulbs should be disinfected. If sick, they should be picked out and destroyed in time

2、 Large brown spot

Symptoms: at the beginning of the disease, brown spots will appear on the leaves and gradually spread to the whole leaves, and the pedicel will also be affected

Prevention and treatment methods: before planting and cultivation, the bulbs should be disinfected. A lot of fungicide solution can be prepared to soak and sterilize. When the disease occurs, Bordeaux solution can be sprayed to pull out the sick plants and destroy them

3、 Nematode disease

Symptoms: this disease is mainly harmful to the leaves and flower stems, resulting in yellowish brown stripes on them, and finally leading to the breaking and even withering of the epidermis of the leaves and stems

Control method: before cultivation, it needs to be soaked in 0.5% formalin solution. If the plant is infected, it needs to be removed and destroyed in time

4、 Yellow streak

Symptoms: after infection with this disease, yellow stripes and spots will appear along the leaf veins, resulting in the greening of flower stems and the shrinkage and withering of bulbs

Control method: disinfect and sterilize before planting, remove and burn the sick plants, and spray insecticides to avoid insect toxicity