Horticultura Brasileira (2003) 21, 73-76

Dirceu Pratissoli, Mauricio J. Fornazier, Anderson M. Holtz, José R. Gonçalves, Andrea B. Chioramital and Hugo B. Zago (2003)
Ocorrência de Trichogramma pretiosum em áreas comerciais de tomate, no Espírito Santo, em regiões de diferentes altitudes
[Occurrence of Trichogramma pretiosum in commercial fields of tomato, in Espírito Santo State (Brazil), in areas with different altitudes]
Horticultura Brasileira 21 (1), 73-76
Abstract: Seven experimental fields were installed in altitudes varying from 200 to 1050 meters, located in Afonso Cláudio and Venda Nova do Imigrante in Espírito Santo State, Brazil. The evaluations of Trichogramma presence were done to determine the native species, know the natural parasitism rate in order to use the obtained results in programs of pest management of Tuta absoluta. In all commercial tomato fields only Trichogramma pretiosum Riley was collected. In the first year the medium number of egg-cards sample with parasitism, as well as the medium number of parasitized eggs, presented an inverse relationship when compared to the areas of altitude between 200 and 850 meters. In the lower areas (200, 380 and 450 m) a constant presence of parasitoid eggs in all the inspected areas was observed. In the second year the behavior differed from that of the first year. The medium values of the inferior parameters, with the medium number of eggs parasitized by cards, were reduced by half. The two year results showed that the aggressiveness of the T. pretiosum strains was differentiated depending on the area.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): Dirceu Pratissoli

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
surveys/distribution/isolation

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phthorimaea absoluta	Tomato (Solanum lycopersicum)	Brazil (south)
Trichogramma pretiosum (parasitoid)	Phthorimaea absoluta	Tomato (Solanum lycopersicum)	Brazil (south)