The Distribution of European Corn Borer Larvae Pyrausta nubilalis (Hbn.), in Field Corn

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Abstract
Three mathematical models[long dash]of biological significance, the Neyman type A, negative binomial and Poisson binomial [long dash] were fitted to data from 4 uniformity plots of field corn infested with varying numbers of P. nubilalis. Recurrence formulae for fitting the Poisson binomial distribution are given. It is concluded that the Poisson binomial gives better fits than the other 2 if either all the plants in the area are dissected, or the population is very low while the negative binomial fits best in the other instances; that the negative binomial is a good approximating distribution; and that the use of Poissons limit to the binomial is not applicable with populations of this insect.