It is no exaggeration to say that all areas where passion fruit is grown basically have the occurrence of passion fruit virus disease. Recently, some netizens have consulted their own planted passion fruit for the symptoms of suspected viral disease, and the passion fruit has a viral disease. What to do, what happens when the passion fruit seedlings develop a virus? The following cultivation and cultivation network will be briefly introduced for the reference of netizens. At present, the following common viruses on the domestic passion fruit are as follows: 1. Passion fruit lignification virus (PWV): The leaf color is lighter, showing mosaic symptoms and slightly shrinking. The fruit is small and deformed, hardened, the skin is thick, the fruit cavity is reduced, and the flower is sterile. The diseased plant is dwarfed and has poor growth and development. 2. Yellow disease (CMV): manifested as yellow spots in leaves and fruits. 3, Passion fruit flower virus (PaMV): the performance of the fruit appears spotted, seriously affecting the fresh fruit selling phase. Tillage help reminds that once the parasitic fruit is suspected to be a viral disease plant, the best way is to first observe whether the other tissue structure of the diseased plant has pathological changes, and whether the disease picture of the passion fruit is diagnosed as viral, bacterial, physiological and deficient. And then deal with it according to the actual situation. Passion fruit seedlings are susceptible to viral diseases. As long as they are infected with the virus, almost no one will be spared, which will lead to poor plant growth, fruit lignification or malformation, low juice rate and poor flavor, which will seriously affect fruit yield and quality. Usually, in the seedling stage, the whole disease can only be directly destroyed by the whole seedlings. If it is in the middle and late stages of the disease, it can only control the disease, and then destroy it after receiving the fruit. It must be disinfected before it can be planted again. Use lime to spread around 50 centimeters, cover the soil and turn it white, then use ferrous sulfate to pour water. However, when the passion fruit plant is infected with the virus, the leaf reaction is not as fast as it is, and when the leaves react, it is already very serious. Since there is no effective agent for viral diseases, once the symptoms are manifested, the death penalty is basically imposed. Some passion fruit virus diseases show symptoms only after receiving the fruit twice. The cultivation suggests to spray the agent and foliar fertilizer regularly at the beginning of the flowering period or the disease, to enhance the disease resistance of the passion fruit plants. 20% virus A wettable powder 400~500 times liquid, or 0.5% anti-toxic agent No. 1 water agent 250~300 times liquid + trace element foliar fertilizer spray prevention. In the severe area where passion fruit virus disease occurs, in order to prevent the spread of passion fruit virus, one year can be taken. At the same time, when doing the pruning, try to do a pair of scissors or cut a knife and then use the flame spray gun to disinfect the scissors to reduce the mutual infection between the plants.