Abstract:Trabala vishnou gigantina Yang have been a serious leaf-eating pest of Hippophae rhamnoides in the Wuqi county of Shaanxi in recent years. The spatial characteristics of T. vishnou gigantina early stage larvae were analyzed using geostatistical methods in H. rhamnoides forests with different slopes and densities, for forecasting and scientific management. The results showed that high levels of hatching occurred mainly in mid-June. Analysis of isotropic variograms indicated T. vishnou gigantina early stage larvae spaced themselves 19.96, 9.45, 20.75, and 13.48 m apart in densely forested shady slopes, open forests on shady slopes, densely forested sunny slopes, and open forests on sunny slopes, respectively, while the intensity of local spatial continuity was 0.692, 0.613, 0.679, and 0.597, respectively. Semivariogram analysis revealed the Gaussian model had the best fit in dense forest, while the Exponential model fitted best with the open forest, implying an intense spatial aggregation pattern of T. vishnou gigantina early stage larvae. The reason for aggregation was mainly its bionomics. As the maps with Kriging interpolation described, T. vishnou gigantina early stage larvae exhibited an obvious edge effect.