Horticultura Brasileira (2007) 25, 286-290

Dirceu Pratissoli, Ricardo Antonio Polanczyk, Cácia Leila Tigre Pereira, Idana Soraya de Andrade Furtado and Juliéder Goronci Cocheto (2007)
Influência da fase embrionária dos ovos da traça-das-crucíferas sobre fêmeas de Trichogramma pretiosum com diferentes idades
[Influence of diamondback moth embrionary egg stage on Trichogramma pretiosum females of different ages]
Horticultura Brasileira 25 (2), 286-290
Abstract: Plutella xylostella is one of the most important pests of Cruciferae. Chemicals have been used to control this insect, but the rapid development of resistance is a serious constraint to this method. Biological control with Trichogramma species has been reported as an alternative to control diamondback moth. However few works report biological parameters of this parasitoid interacting with this pest. This work was carried out to evaluate the influence of egg embryonary stage of P. xylostella on T. pretiosum females at different ages. Females of this parasitoid were organized in five groups. These groups were composed of females just emerged, 24 h; 48 h; 72 h, and 96 hours-old. Each group was formed of ten females. Each female received a card with thirty P. xylostella eggs, one, two and three day-old. Higher parasitism rates were observed with females older than 48 hours, with no influence of host embryonic development. In three day-old eggs it was verified that just emerged females and 48 hour-old, the viability index was superior just to those 96 hour-old. The progeny with one day of embryonary development, presented higher longevity values with just emerged females.
(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): Ricardo Antonio Polanczyk, Dirceu Pratissoli

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

---

Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Plutella xylostella
Trichogramma pretiosum (parasitoid)	Plutella xylostella