Abstract: 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 semivario-gram of F. tonkinensis nymphs at all development stages could be described by spherical model, im-plying 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 investi-gation site, the isoclines 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 distri-bution, while the elder ones were dispersive in distribution.

Key words: Songnen Plain, Ecotone, Ecologic landscape geochemistry, Ecological coupling