Premating and postmating isolation among populations of Metaseiulus occidentalis (Nesbitt) (Acarina: Phytoseiidae)

Abstract

Data presented here and previously obtained on dispersal rates, discreteness of pesticide-resistant populations, and differences in diapause attributes of geographic strains indicate that M. occidentalis is subdivided into distinct populations in W North America, some of which are partially reproductively isolated from others through postmating isolating mechanisms. Populations that are geographically distant may show little reproductive isolation, while others that are adjacent may be partially reproductively isolated. -from Authors