Abstract: 【Aim】 To clarify the migration patterns of subterranean pest insects in the soil in different seasons, so as to provide a theoretical basis for integrated pest management. 【Methods】 The five-point sampling method was used for the field surveys in winter wheat-summer corn rotation fields in Linfen, Shanxi province, and the relationships between the distribution of underground pest insects and soil temperature, humidity and environment were analyzed. 【Results】 The survey results showed that the underground pest insects migrated upward from mid-March to early April, and downward from early October to early November. Different underground pest insects showed different migration time, distribution depth and movement range. With rising temperature in spring, the upward migration order of underground pest insects was wireworms, white grubs, mole crickets, while the downward migration order was reverse as temperature decreased in winter. In addition, soil insects could dig more than 20 cm below ground at low temperature in winter, while at high temperature in summer the depth was about 10 to 20 cm below ground. And for the same species of underground pest insects, they could dig the soil deeper during overwintering period than during oversummering. Furthermore, in view of the range of vertical movement of different varieties of soil insects in the whole year, white grubs moved in shallow soil layer, while mole crickets moved in deeper soil layer and had the deepest digging depth. 【Conclusion】 The migration patterns of various underground pest insects are different, and the migration phenomenon that pest insects move up and down is repeated yearly.  

Key words: Subterranean pest insects, upward migration, downward migration, vertical migration, migration pattern, seasonal variation