Abstract:The soil spatial heterogeneity was studied by integrating geostatistical analysis and GIS techniques based on Locusta migratoria manilensis (Meyen) egg pods distribution pattern in coastal locust areas. Data of egg pods and soil properties, including soil water content at 5 cm, salinity, organic matter and pH, were collected from both spatial scales over two years (2002 and 2003) of extensive surveys: 450m intervals throughout the study area, then 50m grids for possible egg-laying areas which were located at the areas damaged by the locust plague or covered with sparse vegetation. Results showed that: 1) the spatial distribution of locust egg pods, mainly located at middle- and east areas, was patchy and aggregated. Egg pods in the field showed high heterogeneity and spatial autocorrelation was at a distance of about 390 m. 2) Spatial heterogeneity of autocorrelation in total spatial heterogeneity in soil water content at 5 cm, salinity, organic matter and pH were 76.15%, 78.04%, 57.19% and 61.85% respectively, and the scales of spatial heterogeneity were 621 m, 594 m, 1014 m and 1368 m respectively. 3) Locust egg pods were mainly located at middle-and east areas where soil salinity was lower(<1.9%) and soil water content was moderate at 5 cm (10.1%-29.9%) for locust oviposition. Whereas no egg pods were found at west and north areas because of high soil water content at 5 cm (>30%) and salinity(>3%). In a way, the spatial distribution pattern of locust egg pods mainly depended on the soil heterogeneity at the study area. 4) Spatial pattern maps of egg pods and soil properties, drived by block kriging, may provide useful information on sampling in the field, forecasting and monitoring locust plague and reclaiming the environment of locust areas.