Study on the Spatial Distribution Patterns and Sampling Methods of Pseudopygmephorus quadratus Ewing in Mushroom Beds

The spatial distribution patterns of the nymph, nymphadult, adult mite, P. quadratus Ewing, were tested by means of the Iwao equation m= α+βx and the Taylor equation S2 = axb respectively. The results showed that all the distribution patterns tested belonged to aggregative one. The 3 types of sampling methods: Diagonal, Paralled and Scattering were involved in the experiment. The optimum sampling method was the Diagonal one with 14 sampling points for the mite.