A new species of Trichogramma (T. cordubensis n.sp.) (Hym.: Trichogrammatidae) parasites Heliothis eggs on cotton crops in the SW. of Spain
1985
Vargas, Pedro | Cabello García, Tomás
Trichograrnma cordubensis n. sp. is a parasite of Heliothis armigera Hb. eggs in cotton crops in western Andalusia. Reproduced on Ephestia kuehniella Zeller eggs, it is described morphologically and compared with T. chilonis Ishii and T. evanescens Westwood as both present similarities with this species. T. cordubensis can be distinguished in the male genitalia by the shape of the dorsal expansion of the gonobase and the size, shape and relative position of the median ventral projection. Male antennal setae are longer in T. cordubensis than in the other 2 species. In addition, unlike T. chilonis and T. evanescens, T. cordubensis is thelytokous at 20ºC in our laboratory, though males and gynandromorphs can be obtained by altering the rearing temperature, this being another difference of this species.
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