Pest Management Science (2012) 68, 240-244
Roberto M. Goulart, Haroldo X.L. Volpe, Alessandra M. Vacari, Robson T. Thuler and Sergio A. De Bortoli (2012)
Insecticide selectivity to two species of Trichogramma in three different hosts, as determined by IOBC/WPRS methodology
Pest Management Science 68 (2), 240-244
Abstract: BACKGROUND: The use of Trichogramma species is a potential key strategy in integrated pest management. However, its effectiveness depends on the use of chemicals that do not interfere with parasitism and parasite population growth. Here, a study was made of the effects of synthetic insecticides on Trichogramma pretiosum and Trichogramma exiguum in different hosts (Ephestia kuehniella, Plutella xylostella and Spodoptera frugiperda) and the influence of International Organisation for Biological Control (IOBC/WPRS) methodology in selectivity studies using different Trichogramma species. The insecticides used were commercial formulations (triflumuron at a concentration of 0.2 mL L−1 water, etofenprox at a concentration of 0.47 mL L−1 water and endosulfan at a concentration of 7.5 mL L−1 water); the control treatment consisted of distilled water. Eggs attached to cardboard cards were offered to parasitoids inside glass cages. Parasitised eggs, parasitism and adult emergence rates and parasitism reduction were evaluated.
RESULTS: Endosulfan and etofenprox, classified as class-4 toxic products, were extremely toxic to the parasitoids. Triflumuron, classified as a non-toxic product, was selective to the parasitoids in eggs of all hosts.
CONCLUSIONS: The methodology recommended by IOBC/WPRS influenced results regarding the use of different species of parasitoids, and the use of a single parasitoid species in their experiment is questionable.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Alessandra M. Vacari
Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
resistance to pesticides
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Plutella xylostella | ||||
| Ephestia kuehniella | ||||
| Spodoptera frugiperda | ||||
| Trichogramma pretiosum (parasitoid) | ||||
| Trichogramma exiguum (parasitoid) |
