It is necessary to supply water and fertilizer scientifically and reasonably, carry out cage surface density reasonably, and do scientific comprehensive management such as pest control in time and effectively to reduce or alleviate the occurrence of bean yellow leaf disease.
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It's not just yellow leaves, but new leaves are curled, which is suspected to be a virus disease.
On the basis of strengthening the management of water and fertilizer and the prevention and control of aphids and whiteflies, artemisinin, flurbiprofen-methyl, trioxane, virus A or Phytophthora+amino acid oligosaccharides+brassinolide can be sprayed once every 7- 10 day for 2-3 times continuously.