OVERVIEW 1.Definition of migratory pests Annually migrate a long distance at the same season each year; Heredity characteristics suitable for environments. 2.Migratory Advantages Decreasing interspecies competition; Escaping from environmental disadvantages。1. Definition of migratory pests Annually migrate a long distance at the same season each year; Heredity characteristics suitable for environments. 2. Migratory Advantages Decreasing interspecies competition; Escaping from environmental disadvantages. OVERVIEW OVERVIEW