Reduced parasitism of Diaphorina citri (Hemiptera: Liviidae) by Tamarixia radiata (Hymenoptera: Eulophidae) at increasing parasitoid:host ratios

Authors

  • Jabraeil Razmjou Department of Plant Protection, University of Mohaghegh Ardabili, Ardabil 56199-11367, Iran; E
  • Christopher R Kerr Florida Department of Agriculture and Consumer Services, Division of Plant Industry, Gainesville, Florida 32608, USA;
  • Norman C Leppla Entomology and Nematology Department, University of Florida, IFAS, Gainesville, Florida 32611-0620, USA;

Keywords:

Asian citrus psyllid, parasitoid rearing, biological control, super-parasitism

Abstract

Tamarixia radiata females parasitized fewer host Diaphorina citri fourth and fifth instar nymphs as the number of females relative to hosts increased. Releasing additional females above an optimum number increased host feeding and competition for nymphs suitable for oviposition. Super-parasitism by T. radiata, while rare, likely indicates overpopulation, and specifically the loss of production in a mass-rearing system.


 

Sumario

El parasitismo del los quarto y quinto instares de ninfas de Diaphorina citri por Tamarixia radiata disminuyó a medida que aumentaba la proporción de parasitoide:hospedero. La liberación de hembras adicionales aumentó la alimentación sobre los hospederos y la competencia por ninfas adecuadas para la oviposición. El súperparasitismo por T. radiata, aunque es raro, probablemente indica una sobrepoblación y específicamente la pérdida de producción en un sistema de cría en masa.

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Published

2019-04-27

Issue

Vol 102, No. 1 (March 2019)

Section

Scientific Notes

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