How to prevent and control papaya mosaic virus disease when growing papaya?
Papaya mosaic virus disease is a devastating disease commonly occurring in papaya-growing areas in recent years. The plant becomes diseased soon after being planted, mottled yellow flower spots appear on the leaves, the new leaves are densely bunched and tightly clustered, rapidly lose their green color and become hard and brittle, breaking easily; afterward no new roots form and no new leaves grow, the plant grows smaller and smaller, and gradually withers and dies.
Diseased plants cannot flower or set fruit, yields are low and quality is poor, so comprehensive measures must be taken for prevention and control: after papaya seedlings have been transplanted and have survived, drench the roots once with a mixture of 1000x zinc sulfate and 600x plant virus vaccine, about 1-1.5 kg per plant, to weaken the virus activity within the papaya plant, which can significantly reduce the occurrence and harm of papaya mosaic virus disease. During the growth and development of the papaya plant, it is necessary to spray the foliage once every 15-20 days with a mixture of 600x plant virus vaccine, 1500x Shennongsu chelated fertilizer and 1000x zinc sulfate, or 800x Bingdu Bike, 1000x Zhuangfengyou and 1000x zinc sulfate, evenly wetting all the leaves, until water droplets begin to drip down, which can prevent and control the occurrence and harm of papaya mosaic virus disease.
In addition, attention should be paid to controlling the insects that transmit mosaic virus disease, such as aphids, scale insects and whiteflies. During the growth and development of papaya, check the stems and leaves carefully; when the above pests are found causing harm, promptly spray 2-3 consecutive applications of 1000x Yashijing aqueous solution, or 1500x Jieshijing aqueous solution, or 1000x Lesiben aqueous solution for control, spraying once every 7-10 days, evenly wetting all stems and leaves, until water droplets begin to drip down, which can kill the above pests and prevent the spread of mosaic virus disease.