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

Adult morphology of Trichogramma is modified by environmental conditio ns during the preimaginal development. For instance, the low temperatu res inducing diapause cause a decrease of the ratio 'length of longest seta on male flagellum/width of flagellum' in T. evanescens. The spec ies 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 th e necessity of performing comparative morphological studies on individ uals reared in the same conditions.