Imaginal induction of diapause in several ‘adult‐female diapausing’ spider mites

.  The possibility of imaginal induction of diapause in adult female spider mites is suggested in Stigmaeopsis miscanthi . Here, several spider mites are studied to investigate the generality of this phenomenon. The existence of imaginal induction of reproductive diapause is established in Stigmaeopsis longus , two forms of S. miscanthi and Tetranychus kanzawai adult females. The females that develop under diapause‐averting (long days and 18 °C) conditions are induced to diapause under short‐daylength conditions at 18 °C after moulting to the adult stage. However, the adult females of Tetranychus urticae never diapause under these conditions.