Biology and parasitism of Trichogramma pretiosum Riley (Hym., Trichogrammatidae) on Ephestia kuehniella (Zeller) (Lep., Pyralidae) and Heliothis zea (Boddie) (Lep., Noctuidae) eggs
Nogueira de Sa, LA.; Parra, JRP.
Journal of Applied Entomology 118(1): 38-43
ISSN/ISBN: 0931-2048 DOI: 10.1111/j.1439-0418.1994.tb00776.x
Aspects of the biology of 2 strains of Trichogramma pretiosum, reared on the artificial host Ephestia kuehniella and the natural host Heliothis zea collected from maize fields in Sao Paulo, Brazil, were studied in incubators at 25 +or- 1 degrees C, 60 +or- 10% RH and LD 14:10 with the aim of obtaining basic information for the biological control of H. zea on maize. The average duration of the life cycle (egg-adult) of T. pretiosum was similar when reared on both natural and factitious hosts and the sex ratio of the parasitoid was unaffected. The longevity of T. pretiosum was greater when reared on factitious hosts compared with its natural host.