Application of L'-V Model to Testing Insect Population Spatial Pattern

On the basis of the character that varivance(V) is equal to mean (m) in Poisson distribution,a new aggregation index is presented in this paper,I.e L index (L =V/m+V).The index L can be used for testing insects population spatial pattern;and also the relationship between L and V is usually linear,according to the property of L and V,the linear regression formula is presented by author,that is L -V model (L =a+Bv).When the L -V is linear,the estimated parameters values of a and b can offer different information concerning the spatial pattern of insect population.On the basis of the L -V model,the author developed a set of math formula for insects population sampling technique.