%0 Journal Article %T Thermal requirements of Trichogramma pretiosum and T. acacioi (Hym.: Trichogrammatidae), parasitoids of the avocado defoliator Nipteria panacea (Lep.: Geometridae), in eggs of two alternative hosts %A Pratissoli %A Dirceu %A Zanuncio %A Jos¨¦ Cola %A Vianna %A Ulysses Rodrigues %A Andrade %A Josimar Souza %A Pinon %A Tobias Baruc Moreira %A Andrade %A Gilberto Santos %J Brazilian Archives of Biology and Technology %D 2005 %I Tecpar %R 10.1590/S1516-89132005000500003 %X this research studied the thermal requirements of trichogramma pretiosum and t. acacioi (hymenoptera: trichogrammatidae), parasitoids of nipteria panacea (lepidoptera: geometridae), with eggs of the alternative hosts anagasta kuehniella (lepidoptera: pyralidae) and sitotroga cerealella (lepidoptera: gelechiidae) aiming to use these natural enemies in biological control programs of this pest in avocado orchards. t. pretiosum needed 151.83 and 160.04 degree-days, above threshold of 10.70 and 10.75ˇăc, while these values were 158.50 and 155.46 degree-days, above threshold of 10.67 and 10.46ˇăc for t. acacioi when exposed to eggs of a. kuehniella and s. cerealella, respectively. %K avocado %K alternative host %K biological control %K temperature. %U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S1516-89132005000500003&lng=en&nrm=iso&tlng=en