Species o! Trichogramma parasitoid o! Alabama argi/lacea. 1. Biology ai three sbBins.

Abstract

The biology of Trichogramma ep. (Piracicaba sain) and Trichogramma pretiosum Riley, 1879 (Iguatu and Goiãnia sains) (Hym.: Trlchogrammatidae), egg parasitoid otAlabama argillacea (Hubnor, 1818) (Lep.: Nocluidae), rearod on Anagasta kuehnidlla (ZeIler, 1879) (Lep.: Pyralidae) was studied under tive constant temperalures (18°C. 20°C, 25°C, 30 0C and 32°C). The duration of the egg-adult period for the three strains was signifccantly aflected by the temperature, being lhe growlh velocily increased with thermal elevalion. The sarne species (T. pretiosurn) reacled in a different way at Iower temperatures according lo its origin. The viabilily in the egg-adult period (for the three swains) was not affected by the temperature. The number of parasitoides emerged trom a singlo egg of A. kuehniella was affected by temperature for Iguatu and Goiânia efrains, Sexual ralio was not affected by temperature, although T. pretiosum showed a different one Uie two geographic locations. Temperature Increase determined Iongevity reduction for both ted and not fed insecls. 1 was observed that ted insects always had a shorter period ot life. Insecto from Igualu and Piracicaba, when fed, showed a greater Iongevity at 20 °C.