This part of YC/T 341 specifies the methods for tobacco powdery mildew systematic investigation, field census, occurrence level classification, and collection, reporting and summary of forecast data. This section applies to the reporting and reporting of tobacco powdery mildew at all levels of reporting stations.
YC/T 341.7-2010 history
2010YC/T 341.7-2010 Rules for investigation and forecast of tobacco diseases.Part 7:Tobacco powdery mildew