中文摘要：

应用地学统计学研究广东北部桑田中越北腹露蝗（Fruhstorferiola tonkinensis Will）1～5龄若虫的空间格局动态．结果表明：越北腹露蝗1～5龄若虫种群变异曲线函数均为球状模型，表现为聚集分布，但各龄若虫的空间依赖范围分别为1．973、1．968、2．169、2．302和4．307m．利用Kriging插值法由地学统计学软件Surfer8．0产生的各龄若虫等值线图清晰地反映了各龄若虫的空间位置，表明越北腹露蝗有别于其它一些蝗虫，其低龄若虫呈聚居型，高龄若虫呈散居型分布．

英文摘要：

By the methods of geostatistics, this paper studied the spatial pattern of Fruhstorferiola tonkinensis nymphs in mulberry fields of north Guangdong. The results showed that the semivariogram of F. tonkinensis nymphs at all development stages could be described by spherical model, implying an aggregative distribution, and the range of their spatial correlation was 1. 973, 1. 968, 2. 169, 2. 302 and 4. 307 m from 1st to 5th instars. Based on the information obtained from investigation site, the isoelines maps of the instars were created by the geostatistical software Surfer 8.0 with Kriging interpolation, and the resulting maps gave a clear indication about the spatial patterns of the instars. Unlike other locusts, the younger instars of F. tonkinensis had an aggregative distribution, while the elder ones were dispersive in distribution.