What are the control methods for tobacco cucumber mosaic virus disease?
How do you control tobacco cucumber mosaic virus disease? Cucumber mosaic virus disease is the most common and most widely epidemic disease among tobacco viral diseases. The virus is mainly spread by aphids and becomes epidemic as aphids migrate. This disease generally occurs during the seedling revival and rosette stage after tobacco seedlings are transplanted, and often causes plant growth and development to stall, affecting yield....
How do you control tobacco cucumber mosaic virus disease?
Cucumber mosaic virus disease is the most common and most widely epidemic disease among tobacco viral diseases. The virus is mainly spread by aphids and becomes epidemic as aphids migrate. This disease generally occurs during the seedling revival and rosette stage after tobacco seedlings are transplanted, and often causes plant growth and development to stall, affecting yield.
In the early stage of the disease, the leaf veins are transparent, and after a few days they become mosaic, the leaves become narrow and twisted, the epidermal hairs fall off, and the leaves lose their gloss. Affected plants appear stunted with poor root development.
The epidemic of cucumber mosaic virus disease is closely related to the number and activity of aphids. According to surveys in the Huang-Huai tobacco region, during the growth of tobacco seedlings, tobacco aphids have two migration peaks: the first is from late March to early April, and the second is from May 10 to 25 after transplanting. Generally, about 10 days after field tobacco aphids enter the migration peak, the disease occurs most severely.
Because tobacco cucumber mosaic virus disease is mainly spread by aphids, aphid control is the key to controlling the disease. In production, silver-gray plastic film mulching is often used to repel aphids. In addition, measures such as cultivating strong seedlings, deep planting of tobacco, strengthening intertillage and hilling, and scientific fertilization and watering can also reduce the occurrence of the disease. For chemical control, generally during the seedbed stage and within half a month after transplanting, 2‰ zinc sulfate mixed with Yibianjing is sprayed 2 to 3 times. When tobacco aphids occur, pesticides with strong knockdown action such as Yibianjing should also be used to repel aphids and prevent the disease.
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