The effect of buckwheat flowers and cahaba vetch extrafloral nectaries on fitness of the vine mealybug parasitoid Anagyrus pseudococci (Hymenotpera: Encyrtidae)

Authors

  • Nicola A. Irvin Department of Entomology, University of California, 900 University Ave, Riverside, CA 92521, USA
  • Mark S. Hoddle Department of Entomology, University of California, 900 University Ave, Riverside, CA 92521, USA Center for Invasive Species Research, University of California, Riverside, CA 92521, USA

Keywords:

cover crops, extrafloral nectar, fecundity, longevity, sex ratio

Abstract

The effect of access to buckwheat flowers (Fagopyrum esculentum Moench; Polygonales: Polygonaceae) or vetch extrafloral nectaries (Vicia sativa L. cv. ‘cahaba white’; Fabales: Fabaceae) on the fitness of Anagyrus pseudococci (Girault) (Hymenotpera: Encyrtidae) (a parasitoid of the vine mealybug, Planococcus ficus [Signoret]) (Hemiptera: Pseudococcidae) was determined in the laboratory. Female A. pseudococci provided with vetch survived 4 days longer compared with water only. Buckwheat had no effect on the average longevity of A. pseudococci. Anagyrus pseudococci offspring production increased by 132% and 152% when females were provided either vetch or buckwheat, respectively, when compared with water. There was no significant difference in parasitoid longevity or fecundity between plant species. Buckwheat increased the percentage of female A. pseudococci offspring by 15% and 19% when compared with water and vetch, respectively.

 

Resumen

Se determinó el efecto al acceso de flores de alforfón (Fagopyrum esculentum Moench; Polygonales: Polygonaceae) o nectarios extraflorales de veza blanca (Vicia sativa L. cv ‘cahaba blanco’; Fabales: Fabaceae) sobre el estado fisico de Anagyrus pseudococci (Girault) (Hymenotpera: Encyrtidae) (un parasitoide de la cochinilla harinosa de la vid,Planococcus ficus [Signoret]; Hemiptera: Pseudococcidae) en el laboratorio. Hembras de A. pseudococci proveidas con veza sobrevivió 4 dias mas que las hembras proveidas con sólo agua. El alforfón no tuvo ningún efecto sobre el promedio de la longevidad de A. pseudococci. La producción de progenie de Anagyrus pseudococci incrementó en un 132% o un 152% cuando las hembras recibieron ya sea veza o alforfón, respectivamente, en comparación con las hembras proveidas con agua. No hubo una diferencia significativa en la longevidad o la fecundidad del parasitoide entre las especies de plantas. El alforfón incrementó el porcentaje de la progenie de las hembras de A. pseudococci en un 15% y un 19% en comparación con agua y veza, respectivamente.

 

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Issue

Vol. 98, No. 1 (March 2015)

Section

Research Papers

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