Papers | Boln. Asoc. esp. Ent. 21 (Supl.): 17-21 | 1997
Biology of Trichogramma cordubensis (Hym., Trichogrammatidae) under different photoperiods
P. García & J. Tavares
ABSTRACT
This work was carried out to study the effect of photoperiod on Trichogramma cordubensis Vargas & Cabello biology. T. cordubensis was reared on Ephesíia kuehniella Zeller eggs at 20°C and 75±5% of HR. The essay compnsed diíferent photophase (L): scotophase (D) combinations that simulated the day length of summer (16:8), winter (8:16) and spring or autumn (12:12) seasons in the Azores. Photoperiod did not influence the parasitoid longevity, emergence rate and parasitism. However, it had a significant effect on the parasitoid egg to adult developmental time, the last enJarging with íncreasing photophase.
KEYWORDS
Insecta, Trichogramma, parasitoid, photoperiod, biology
