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Suitability of the pest-plant system Tuta absoluta (Lepidoptera: Gelechiidae) : Tomato for Trichogramma (Hymenoptera: Trichogrammatidae) parasitoids and insights for biological control
- Source :
- Journal of Economic Entomology 106 (6), 2310-2321. (2013)
- Publication Year :
- 2013
-
Abstract
- The South American tomato leafminer, Tuta absoluta Meyrick (Lepidoptera: Gelechiidae), is a major pest that has recently invaded Afro-Eurasia.[br/] Biological control, especially by Trichogramma parasitoids, is considered to be promising as a management tool for this pest. However, further development of Trichogramma-based biocontrol strategies would beneÞt from assessing the impact of released parasitoid offspring on the pest. Under laboratory conditions, we 1) compared the parasitismof five Trichogramma species-strains on the pest-plant system T. absoluta-tomato, and 2) assessed various biological traits of parasitoids, mass-reared on a factitious host (Ephestia kuehniella Zeller), when developing on T. absoluta. In addition, we evaluated the overall efÞciency of two specific Trichogramma species when released under greenhouse conditions in combination with a common natural enemy in tomato crop, the predator Macrolophus pygmaeus Rambur.[br/] Parasitoids emerging from T. absoluta on tomato showed lower parasitism rates and poor biological traits, for example, wing deformations, reduced longevity, when compared with the control reared on the factitious host. Under greenhouse conditions, the parasitoids that developed on T. absoluta after initial releases contributed little to biological control of T. absoluta, and parasitism tended to be lower when the predator was present. However, a slightly higher T. absoluta control level was achieved by combining the predator and release of the parasitoid Trichogramma achaeae Nagaraja and Nagarkatti.[br/] This study shows that Trichogramma parasitoids may not build up populations on the T. absolutaÐtomato system, but that Trichogramma parasitoids can be used in combination with M. pygmaeus to enhance biological control of the pest in tomato crops.
- Subjects :
- culture agricole
parasitisme
fitness
generalist predator
invasive species
inundative release
mass-rearing
lutte biologique
essai en serre
trichogramma
organisme nuisible
amérique du sud
longévité
gelechiidae
parasitoïde
insecte ravageur
eurasie
Microbiology and Parasitology
approche combinée
taux de parasitisme
macrolophus pygmaeus
progéniture
ephestia kuehniella
trichogramma achaeae
tuta absoluta
Microbiologie et Parasitologie
ennemi naturel
trait biologique
impact
lepidoptera
essai en laboratoire
mineuse de la tomate
déformation
Hôte factice
contrôle biologique
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Journal of Economic Entomology 106 (6), 2310-2321. (2013)
- Accession number :
- edsair.od......1582..9b5d3cd57c92a3f0a44cce70abeeb394