EFFECTS OF DIAPAUSE AND HOST SPECIES ON SOME MORPHOMETRIC CHARACTERS IN TRICHOGRAMMA (HYM, TRICHOGRAMMATIDAE)

Adult morphology of Trichogramma is modified by environmental conditions during the preimaginal development. For instance, the low temperatures inducing diapause cause a decrease of the ratio 'length of longest seta on male flagellum/width of flagellum' in T. evanescens. The species of the host also influences numerous body ratios. So, in females, the development of tibiae with regard to wings is more important with Scotia ipsilon than with Galleria mellonella. These results confirm the necessity of performing comparative morphological studies on individuals reared in the same conditions.