Spatial Pattern of the Imported Cabbageworm, <i>Pieris rapae</i> (L.) (Lepidoptera: Pieridae), on Cultivated Cruciferae

Abstract

It is universally recognized that the spatial distribution or pattern of animals and plants in nature is neither uniform nor truly random. In order to study a biological community quantitatively, or to assess the densities of living organisms in their habitats, ecologists have found it profitable to sample the space in which the organisms occur. The distribution of the number of individuals per sample is of fundamental importance.