How to prevent and cure papaya mosaic virus disease?

What is the harm of papaya mosaic virus disease? How to prevent and cure papaya mosaic virus disease? Also ask experienced netizens to help introduce that papaya mosaic virus disease is a destructive disease commonly occurred in papaya producing areas in recent years, so the farming network has sorted out the harm and control methods of papaya mosaic virus disease, which are listed in detail below for netizens' reference. The harm of papaya mosaic virus disease: in the early stage of fruit susceptibility, water-stained round spots (ring spots) also appeared on the epidermis, and the latter few round spots could be linked into irregular patches. Due to different types of virus, the young leaves of diseased plants in low humidity period will also appear other yellowed leaves and malformed leaves. Such as chicken claw shape, rolled leaf shape, shrinking leaf shape and so on. Mosaic virus disease occurs after a kind of papaya. At the beginning of the disease, water-stained spots appear between the stem, leaf veins and the branch veins of the tender leaves, followed by yellow-green or dark green mosaic disease on the tender leaves. Such as papaya fruit infected in the initial epidermis also appear water-stained round spots (that is, ring spots), the latter several round spots can be linked into irregular patches. Papaya leaves with mosaic disease appear mottled yellow flowers, new leaves are dense and tight, quickly lose green and become hard and brittle, easy to break, and then do not send new roots, do not grow new leaves, plants grow smaller and smaller, and gradually wither and die. Generally infected papaya trees can not blossom and bear melons, and the yield is low and the quality is poor. Control methods of papaya mosaic disease: first, papaya mosaic virus disease is mainly transmitted by aphids, scale insects and whitefly, so pest control is the primary measure to prevent the spread of mosaic virus disease. The stems and leaves of papaya can be checked during the growth and development of papaya. If insect pests are found, 1000 times aphid lice water solution, or 1500 times scale lice solution, or 1000 times scale lice solution, can be sprayed once every 7 to 10 days to wet all stems and leaves evenly, so that the above pests can be killed and the spread of mosaic virus can be avoided. Second, after the seedlings of papaya were planted and survived, the roots were drenched with a mixture of 1000-fold zinc sulfate and 600x plant virus vaccine, about 1.5kg per plant, in order to weaken the virus activity in papaya plants. it can obviously reduce the occurrence and harm of papaya mosaic virus disease. Third, in the process of growth and development of papaya plants, 600x plant virus vaccine, 1500 times Shennongsu chelate fertilizer, 1000 times zinc sulfate mixture, or 800x virus Bike, 1000 times Zhuangfengyou and 1000 times zinc sulfate mixture must be sprayed on the leaves every 15 days. It is appropriate to start dripping water, which can prevent the occurrence and harm of papaya mosaic virus disease. Planting methods of papaya fertilization methods of papaya