Ecological niche modelling of Gargaphia decoris (Heteroptera), a biological control agent of the invasive tree Solanum mauritianum (Solanales: Solanaceae).

MINGHETTI E.; OLIVERA L.; MONTEMAYOR S. I.

PEST MANAGEMENT SCIENCE

JOHN WILEY & SONS LTD

Lugar: LOndres; Año: 2019

1526-498X

BACKGROUND: The South American tree Solanum mauritianum Scopoli (Solanaceae) is a problematic invasive plant in numerous tropical, sub-tropical and temperate regions across the globe. As conventional management approaches are not cost-effective, biological control provides an alternative approach. Gargaphia decoris Drake (Tingidae), is currently being implemented as a biological control agent in South Africa and New Zealand. Considering the importance of climate in the establishment and success of a biological control agent, this study used ecological niche models (ENM) to identify areas where S. mauritianum is a problematic invader and where suitable conditions exist for G. decoris. Additionally, the climate niche dynamics of G. decoris were investigated and ENMs projected worldwide for the year 2050 were built.RESULTS: Our results indicate that most of the countries where S. mauritianum isproblematic have suitable climatic conditions for G. decoris, and that the species can survive in climates with lower temperatures than the ones in its native range. For future climates ENMs predict wider regions with favourable climatic conditions for G. decoris.CONCLUSION: Considering the results of this study, the prospects of G. decoris as a biological control agent is good under present and future climates. Theagents introduction could be considered in affected countries where it has not been released.