Pondering over the phenomenon of Zhouzhuang,two kinds of incentive factors,the material incentive factors and the immaterial incentive factors,were brought forward to stimulate the participation of the community residents for actualizing the sustainable development strategy of tourism,which application and acting mechanism were analyzed.

This paper refers to the kinds,characteristics,pathogeny(including abiotic factors and biotic factors) and control measures of this disease.

The causations for the precipitate in grape wine which affects its aestthetic quality and taste consist of non-biological factors such as the material, auxillary material and wine containers etc.