Autumn is the peak period of passion fruit planting. Recently, some netizens have reported that the leaves of the newly planted passion fruit seedlings are shrinking and suspected to be viral diseases. What is going on? How to identify the passion fruit virus disease, what should I do if the virus disease occurs during the seedling stage? How does the passion fruit seedling prevent viral disease? The following cultivation and cultivation network will be briefly introduced for the reference of netizens. The harm of passion fruit virus seedlings Passion fruit seedlings are susceptible to viral diseases. As long as the virus is infected, almost no one will be spared, which will lead to poor plant growth, fruit lignification or malformation, low juice rate, poor flavor and other problems, seriously affecting the fruit. Yield and quality are basically equal to no solution. Usually, in the seedling stage, the whole disease can only be directly destroyed by the whole plant seedlings. If it is in the middle and late stages of the result, it can only control the disease and destroy it after receiving the fruit. Due to the highly contagious viral disease, the damage to passion fruit is quite serious. Passion fruit seedling virus disease identification Passion fruit seedling virus disease leaf characteristics are generally the following three types: 1, uneven shape: the appearance of thick yellow markings, the blade shrinks into a deformed shape, the leaf shape is distorted, the surface is uneven; 2, thickening : There are thick yellow spots, the leaves become thicker, and the leather is thick and hard; 3. The leaf type: the yellowish markings appear, the edges of the leaves are curled inward with the main vein as the center, and the petioles are formed at an acute angle. The fruit is small and deformed, hardened, with thick skin and narrowing of the fruit cavity. It should be noted that because the temperature is lower after entering the autumn and winter, the passion fruit seedlings are weakly resistant, so the symptoms of suspected viral diseases appear; or the symptoms of suspected viral diseases may occur due to the medicinal damage caused by the application of herbicides; or the damage caused by mites Suspected symptoms of viral disease can occur. Pathogenesis of passion fruit seedling virus disease Pathogens can cross-infect on crops such as Solanaceae, tobacco, and potatoes, and overwinter on pathogens. Long-distance transmission by insects and diseased seedlings, mainly by aphids. The orchard, which has extensive management and has a lot of pests, is more serious. Precautions for Passion Fruit Virus Diseases 1. Select non-toxic healthy seedlings, control from the source, disinfect the soil before planting, and choose cultivated land near the orchard or without crops such as pepper, tobacco, solanacea, melon and other crops as the passion fruit planting area. . 2, if the diseased plants are not many, then we recommend to directly remove, so as not to affect other healthy plants, while doing a good job of virus prevention of healthy plants. The other is that a large number of passion fruit seedlings are found to be suspected of viral diseases. At this time, you should consider whether your seedlings are infected with viruses or are not infected in time. 3, strengthen cultivation management, scientific pruning, cut off sick branches and dense branches, adjust the ventilation and transparency in the garden, timely clean up and burn diseased diseased leaves, reduce the number of pests and diseases. Timely removal of diseased plants with severe disease and disinfection with quicklime. 4, regular use of insecticides to prevent insects, but also pay attention to sterilization. Especially after the rain before the rain, the fungicides and pesticides must not be paralyzed. Preventing is the most important measure to avoid viral diseases. 5. If the virus disease occurs during the seedling stage of Passion Fruit, the non-toxic seedlings should be removed in time, and the pesticide should be sprayed regularly to prevent it in advance.