Virus preparations were used to control eggplant vegetables virus disease, and attenuated vaccine N14 was used to prevent tomato and bell pepper virus diseases caused by tobacco mosaic virus infection. The method is to wash the roots of the seedlings with 1 to 2 true leaves of tomato and sweet pepper, wash them in 100 times the attenuated vaccine N14, and inoculate the seedlings 30 minutes later.
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