Florida Entomologist (2001) 84, 215-221

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Donna Ellis, Richard McAvoy, Luma Abu Ayyash, Melisa Flanagan and Matthew Ciomperlik (2001)
Evaluation of Serangium parcesetosum (Coleoptera: Coccinellidae) for biological control of silverleaf whitefly, Bemisia argentifolii (Homoptera: Aleyrodidae), on poinsettia
Florida Entomologist 84 (2), 215-221
Abstract: Control of silverleaf whitefly (Bemisia argentifolii Bellows and Perring) on greenhouse poinsettia with biological agents has been unreliable. Serangium parcesetosum Sicard, a coccinellid predator, appears to have great potential for silverleaf whitefly control. In our study, dynamic changes in B. argentifolii populations on caged poinsettia in response to S. parcesetosum were monitored. Silverleaf whiteflies were introduced to caged poinsettias at 1 or 10 adults per plant and 6 weeks later S. parcesetosum were introduced at 0, 2 or 4 adults per plant. Within 2 weeks of Serangium release whitefly mortality increased dramatically, and for the ensuing 10 weeks whitefly levels remained at or near those observed at time of predator release. Beetle larvae were observed 2 to 10 weeks after Serangium release when prey was initially high but not when prey was initially low. Thus, whitefly control was primarily due to prolonged survival and continuous feeding of individual beetles. Our data suggest that Serangium may work well in a multiple species biological control program for whiteflies on poinsettia. However, further study is needed on multiple species interactions within the host (pest/plant) species, and on release management strategies.

El control de la mosca blanca (Bemisia argentifolii Bellows and Perring) en poinsetias de invernadero con agentes biológicos ha sito errático. Serangium parcesetosum Sicard, un predador coccinélido, parece tener gran potencial para el control de B. argentifolii. En nuestro estudio, cambios dinámicos en poblaciones de B. argentifolii en poinsetias enjauladas en respuesta a S. parcesetosum fueron observados. Las moscas blancas fueron liberadas en poinsetias enjauladas de 1 a 10 adultos por planta y 6 semanas después S. parcesetosum fueron liberados de 0,2, o 4 adultos por planta. Dentro de 2 semanas desde la introducción de Serangium la mortalidad de la mosca blanca incremento dramáticamente, y por las próximas 10 semanas los niveles de moscas permanecieron en o cerca de aquellos observados al momento de introducción del predador. Larvas de escarabajos fueron observadas de 2 a 10 semanas después de la liberación de Serangium cuando el numero de presa estaba inicialmente alto pero no cuando el numero de presa estaba inicialmente bajo. Por lo tanto, el control de la mosca blanca fue debido principalmente a supervivencia prolongada y alimentación continua de escarabajos individuales. Nuestros datos sugieren que Serangium pudiera servir bien en un programa de control de especies múltiples de moscas blancas en poinsettia. Sin embargo, mas investigación es necesaria sobre las interacciones de especies múltiples dentro la especie (plaga / planta), y en estrategias de control de liberación.
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Database assignments for author(s): Matthew A. Ciomperlik

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection


Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.


Bemisia tabaci biotype MEAM1 Euphorbia (crop) U.S.A. (NE)
Serangium parcesetosum (predator) Bemisia tabaci biotype MEAM1 Euphorbia (crop) U.S.A. (NE)