2.Distribution Distributions of 3 species are nationwide in China. Brown planthopper is most heavily distributed in southern China.Causes severe damage in valley of Yangtse River and southern paddy fields. White backed planthopper is mostly distributed in the south too,but has a wider distribution than brown. Small brown planthopper is most heavily distributed in northern China. Distributions of 3 species are Distributions of 3 species are nationwide in China. nationwide in China. Brown planthopper planthopper is most heavily is most heavily distributed in southern China. Causes distributed in southern China. Causes severe damage in valley of severe damage in valley of Yangtse Yangtse River and southern paddy fields. and southern paddy fields. White backed White backed planthopper planthopper is mostly is mostly distributed in the south too, but has a distributed in the south too, but has a wider distribution than brown. wider distribution than brown. Small brown Small brown planthopper planthopper is most heavily is most heavily distributed in northern China. distributed in northern China. 2. Distribution 2. Distribution