Revista Colombiana de Entomología (2010) 36, 16-19

Gilberto Santos Andrade, Dirceu Pratissoli, Reginaldo Barros, Hugo Bolsoni Zago, Alexandre Igor De Azevedo Pereira and Leandro Pin Dalvi (2010)
Screening of two Trichogramma species, native to southeastern Brazil, for the control of tobacco budworm
Revista Colombiana de Entomología 36 (1), 16-19
Abstract: The biological control of insect pests using parasitoids may have limited success without an understanding of the effect of temperature on natural enemies. The objective was to determine the parasitism, egg viability and sex ratio of Trichogramma exiguum and Trichogramma acacioi (Hymenoptera: Trichogrammatidae) to control Heliothis virescens (Lepidoptera: Noctuidae) eggs after two generations on eggs of Anagasta kuehniella at 18, 20, 25, 30 and 33ºC. The increase in temperature favored the parasitism of T. exiguum. The egg viability of T. exiguum ranged between 70.1 and 97.1% and from 81.5 to 98.4% for T. acacioi in H. virescens eggs. The sex ratio of T. acacioi was constant at all temperatures studied, with only females in the progeny. Trichogramma exiguum reared in H. virescens eggs met the standards of quality control for mass production. Trichogramma exiguum showed higher parasitism than T. acacioi at high temperatures. However, both species had low parasitism on H. virescens eggs.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Dirceu Pratissoli

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Heliothis virescens		Brazil (south)
Trichogramma exiguum (parasitoid)	Heliothis virescens		Brazil (south)
Trichogramma acacioi (parasitoid)	Heliothis virescens		Brazil (south)