How to prevent and control papaya mosaic virus disease? A detailed guide to practical methods
What harm does papaya mosaic virus disease cause? How to prevent and control papaya mosaic virus disease? Experienced gardeners are also asked to help explain. Papaya mosaic virus disease is a devastating disease that has commonly occurred in papaya production areas in recent years. Therefore, Zhongdi Network has compiled the harm and control methods of papaya mosaic virus disease, listed in detail below for net...
What harm does papaya mosaic virus disease cause? How to prevent and control papaya mosaic virus disease? Experienced gardeners are also asked to help explainPapaya mosaic virus disease is a devastating disease that has commonly occurred in papaya production areas in recent years. Therefore, Zhongdi Network has compiled the harm and control methods of papaya mosaic virus disease, listed in detail below for gardeners' reference.
Harm of papaya mosaic virus disease:
In the early stage of fruit infection, water-soaked round spots (ring spots) also appear on the skin, and later several round spots may join into irregular patches. Due to different types of the virus, other yellowed leaves and deformed leaves may also appear on diseased plants during low-humidity periods. Such as chicken-claw shape, curled-leaf shape, shrunken-leaf shape, etc.
Mosaic virus disease in papaya appears as soon as it is planted. At the beginning of the disease period, water-soaked spots appear on the stem, leaf veins, and between the branch veins of tender leaves, followed by mosaic symptoms of alternating yellow-green or alternating dark and light green on the tender leaves. If papaya fruit is infected, water-soaked round spots (ring spots) also appear on the skin in the early stage, and later several round spots may join into irregular patches.
On papaya leaves affected by mosaic disease, mottled yellow spots appear; new leaves are densely clustered and tightly bound, quickly lose green color and become hard and brittle, and break easily. Afterward, no new roots are produced and no new leaves grow. The plant becomes smaller and smaller as it grows, and gradually withers and dies. Generally, infected papaya trees cannot flower or set fruit, and their yield is low and quality poor.
Control methods for papaya mosaic disease:
1. First, papaya mosaic virus disease is mainly spread by aphids, scale insects, and whiteflies, so pest control is the primary measure to prevent the spread of mosaic virus disease. During the growth and development of papaya, inspect the stems and leaves. If pests are found, immediately spray continuously 2 to 3 times with a 1000-fold aqueous solution of Yashijing, or a 1500-fold aqueous solution of Jieshijing, or a 1000-fold aqueous solution of Lorsban for control, spraying once every 7 to 10 days, evenly wetting all stems and leaves, until water droplets begin to drip down. This can kill the above pests and avoid spreading mosaic virus disease.
2. After papaya seedlings are established and survive, drench the roots once with a mixed solution of 1000-fold zinc sulfate and 600-fold plant virus vaccine, about 1 to 1.5 kg per plant, to weaken the virus activity in the papaya plant, which can significantly reduce the occurrence and harm of papaya mosaic virus disease.
3. During the growth and development of papaya plants, it is necessary to spray the leaves once every 15 to 20 days with a mixed solution of 600-fold plant virus vaccine, 1500-fold Shennongsu chelated fertilizer, and 1000-fold zinc sulfate, or a mixed solution of 800-fold Bingdubike, 1000-fold Zhuangfengyou, and 1000-fold zinc sulfate, evenly wetting all leaves until water droplets begin to drip down. This can prevent and control the occurrence and harm of papaya mosaic virus disease.
Papaya planting methods
Papaya fertilization methods