Abstract
Density of the green rice leafhopper, Nephotettix cincticeps UHLER, often reaches a high level where direct damage to rice plants occurs in Hokuriku District, an area of Japan with heavy snow. In contrast, the density was maintained at a low level in Tôkai-Nisinippon District. Comparison of distribution patterns of the number of individuals per rice hill in the two districts showed that the patterns were slightly contagious in both districts, and there was no significant difference between either of them with respect to the distribution based on the density-mean crowding regression.
