This standard specifies the investigation methods and disease severity classification of tobacco diseases caused by fungi, bacteria, viruses, nematodes and abiotic factors. This standard is suitable for assessing the severity of tobacco disease damage and the losses caused by the disease, and is also suitable for research on the growth and decline of diseases and their occurrence patterns.
YC/T 39-1996 history
1970YC/T 39-1996 Grade and investingating method of tobacco disease