BioControl (2003) 48, 685-693
Maria R. Manzano, J.C. van Lenteren and C. Cardona (2003)
Influence of pesticide treatments on the dynamics of whiteflies and associated parasitoids in snap bean fields
BioControl 48 (6), 685-693
Abstract: To determine the influence of pesticide treatments on the population dynamics of the whiteflies Trialeurodes vaporariorum (Westwood) and Bemisia tabaci Gennadius (Homoptera: Aleyrodidae) and their naturally occurring parasitoids, we performed field experiments on insecticide sprayed and unsprayed fields during a cropping season of snap bean in Pradera, Valle del Cauca, Colombia. Substantially larger populations of whitefly nymphs occurred in the unsprayed field than in the sprayed field. Parasitoids were more frequent in unsprayed than in sprayed fields with Encarsia nigricephala Dozier being more prevalent than Amitus fuscipennis MacGown and Nebeker. In sprayed fields the nymphs parasitized by E. nigricephala exceeded the unparasitized whitefly nymphs at the end of the cropping season. Our results suggest that while under current agricultural practices whiteflies on snap beans cannot be exclusively controlled by naturally occurring parasitoids, parasitoids may be integrated with chemical control in order to reduce crop damage.
(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): Maria R. Manzano, Joop C. van Lenteren, Cesar Cardona
Research topic(s) for pests/diseases/weeds:
control - general
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
population dynamics/epizootiology
resistance to pesticides
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Bemisia tabaci | Beans (Phaseolus) | Colombia | ||
| Trialeurodes vaporariorum | Beans (Phaseolus) | Colombia | ||
| Encarsia nigricephala (parasitoid) | Bemisia tabaci | Colombia | ||
| Amitus fuscipennis (parasitoid) | Trialeurodes vaporariorum | Beans (Phaseolus) | Colombia |
