Abstract:

In this paper, the spatial distribution pattern of 3 pests Bemisia myricae Kuwana, Diaphania pyloalis Walker, Tetranychus cinnabarinus Boisduval were analyzed with Taylor’s power law, Iwao’s distribution function, and 5 aggregation indexes. The results showed that the spatial distribution pattern of B. myricae was between uniformly distribution and random distribution, but tended to the latter, T. cinnabarinus was between aggregated and random distribution, but tended to the latter, and D. pyloalis was between uniformly distribution and random distribution. By using the parameters α and β in Iwao’s M*-M regression equation, the optimal sampling numbers were determined.