Pesquisa Agropecuária Brasileira (2010) 45, 638-645

Christian Sherley Araújo da Silva-Torres, Jorge Braz Torres, Reginaldo Barros and Ângelo Pallini (2010)
Parasitismo de traça-das-crucíferas por Oomyzus sokolowskii
[Parasitism of diamondback moth by Oomyzus sokolowskii]
Pesquisa Agropecuária Brasileira 45 (7), 638-645
Abstract: The objective of this work was to evaluate the parasitism capacity of the larval-pupal parasitoid Oomyzus sokolowskii submitted to different densities of the host diamondback moth, Plutella xylostella, in the laboratory, greenhouse and field. In the laboratory and in the field, O. sokolowskii was exposed to densities of 2, 4, 8 or 16 larvae. In the laboratory, 300 mL recipient were used, and in the field kale plants were placed in cages (30x50 cm). In the greenhouse, microparcels consisted of six cabbage plants each infested with 25, 50, 85 or 100 larvae. The number of parasitized larvae increased with host density and varied from 1.7 to 10.4 (laboratory) and from 0.61 to 7.0 (field). In the greenhouse, parasitism rate was higher in microparcels with higher host infestation. The time of exposition was significant, with higher parasitism rate at 72 hours after host exposure (24 hour, 52.4%; and 72 hour, 80.7%), irrespective of host density. Oomyzus sokolowskii responds to increases in host density, but maintains the parasitism rate unchanged irrespective of variations in the host availability.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
Full text of article
Database assignments for author(s): Jorge B. Torres

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella		Brazil (NE)
Oomyzus sokolowskii (parasitoid)	Plutella xylostella