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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

DOI: 10.1590/S1516-89132005000500003

Keywords: avocado, alternative host, biological control, temperature.

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Abstract:

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 10.75°c, while these values were 158.50 and 155.46 degree-days, above threshold of 10.67 and 10.46°c for t. acacioi when exposed to eggs of a. kuehniella and s. cerealella, respectively.

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