Prey consumption and development of the indigenous lacewing Chrysoperla externa feeding on two exotic Eucalyptus pests

ABSTRACT

The green lacewing Chrysoperla externa is a widespread species in the Neotropical region that occurs in different habitats. Its presence in Eucalyptus plantations infested with Glycaspis brimblecombei (Hemiptera: Aphalaridae) and Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) suggests that this lacewing might feed on one or both exotic pest species. In order to evaluate C. externa as a potential biocontrol agent of the eucalyptus pests, the prey consumption, development, survival and reproduction of the predator were evaluated under laboratory conditions. C. externa larvae consumed nymphs of both pest species. Developmental time and reproduction parameters of C. externa fed G. brimblecombei were similar to those obtained with the factitious prey Sitotroga cerealella. When fed on T. peregrinus, C. externa showed a delay in its developmental time and the emerged adults were malformed. The results of this study suggest that the green lacewing is a good candidate to be used in augmentative or conservative biological control programmes against G. brimblecombei. Further research is necessary to analyse the potential of this predator as a biocontrol agent under field conditions.

KEYWORDS:

• Chrysoperla externa
• Glycaspis brimblecombei
• Thaumastocoris peregrinus
• Eucalyptus
• native predator

Acknowledgements

We thank Mrs Diana Arias for the help provided with the assays. We also thank Consejo Nacional de Investigaciones Científicas y Técnicas.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

The study was funded by the Instituto Nacional de Tecnología Agropecuaria (Specific Project PNFOR1104072) and the project Sanidad Forestal 110 of the Unidad para el Cambio Rural.