Abstract: According to the fact that the atmospheric circulation characteristics (ACC) of 500hPa can indicate the weather patterns and control the weather conditions,the relationship between the pest index (occurrence,ingoing quantity and the Fifth generation quantity of pest WBPH) and ACC factors was analyzed with the aid of both linearity and optimization correlation techniques.A batch of ACC factors,which correlated excellently and stably with the pest index,was picked out and the prediction model was built up in Jiangsu Province in order to forecast the pest index.At the same time,the significant correlation was also verified between ACC factors and the weather conditions affecting the occurrence and development of pest WBPH, and it provided some new long-term factors and new methods for prediction of the occurrence and development of pest WBPH.

Key words: Soil auger, Root index, Root biomass, Root distinction coefficient, Abandoned land, Loess Plateau