Abstract:

Abstract ：Six methods were used to determine the spatial pattern of Frankliniella occidentalis on rose field. the results show that the spacial distribution pattern of the pest on rose is Aggregated distribution，the basic ingredients is individual population,the individual attracted each other,The aggreggation distribution of the pest was due to its life habit and environmental factors. In addition,. A sequential sampling model was built by Iwao’s way (regressive relation by m*-m) Theoretical sampling numbers of field survey can be estimated with N=1/D2[6.7692/m+0.4799]. several sampling methods for sampling populations of Frankliniella occidentalis in rose field were compared, and The best sampling method was chessboard method. The population dynamics of the pest on rose is single summit from July 8 to June 4,the maxuim density occurred in June 19 .