The Effect of Plot Size on Some <em>Pratylenchus Penetrans</em> (Phytonematode) Population Parameters

Abstract

Pratylenchus penetrans counts obtained from a rose field, sampled sequentially by decreasing the plot sizes were computed to obtain the respective sample means, variance and k-value of the negative binomial distribution. Plots 21 m x 80 m, 3.6 m x 3.6 m and 0.6 m x 0.6 m were sampled for the nematode. It is reported that the k-value is influenced by plot size (P < 0.05) and depends on the sample mean.