This paper deals with the application of negative binomial distribution for describing the inherent variability in the number of green stink bug on pigeon pea in experimental field. The low yields of pigeon pea crop are due to green stink bug. The parameters of negative binomial distribution areestimated by the method of Method of Moments (MM) and Method of Proportion of Zeroth Cell (MPZC). In order to test the suitability of the distribution, values have been computed and seemed to be non- significant.