Abstract
ABSTRACT: Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae) is a sap-sucking insect that has become a major pest of eucalypts. The entomopathogenic fungi Beauveria bassiana (Bals.-Criv.) Vuill. and Metarhizium anisopliae (Metsch.) Sorokin have the potential to control insect pests. This study evaluated the susceptibility of T. peregrinus to two commercial products based on conidia of B. bassiana and M. anisopliae. The fungi were sprayed onto adults of T. peregrinus at a concentration of 1 × 108 conidia mL−1 to evaluate their pathogenicity and conidial production on the insect cadavers. Beauveria bassiana caused 100 % mortality, while M. anisopliae caused more than 80 % mortality of T. peregrinus adults 11 days after fungi application. The fungi colonized the head and thorax regions and caused high mortality rates through conidial production. Pathogenicity of entomopathogenic fungi B. bassiana and M. anisopliae to T. peregrinus show potential to use these fungi in integrated pest management.
Highlights
The bronze bug Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae), native to Australia, is as a major pest to species of genus Eucalyptus (Laudonia and Sasso, 2012; Garcia et al, 2013; Souza et al, 2016)
This study evaluated the susceptibility of T. peregrinus to two commercial products based on conidia of B. bassiana and M. anisopliae
Beauveria bassiana caused 100 % mortality, while M. anisopliae caused more than 80 % mortality of T. peregrinus adults 11 days after fungi application
Summary
The bronze bug Thaumastocoris peregrinus Carpintero and Dellape (Hemiptera: Thaumastocoridae), native to Australia, is as a major pest to species of genus Eucalyptus (Laudonia and Sasso, 2012; Garcia et al, 2013; Souza et al, 2016). This pest has been introduced to more than 10 countries in Europe, Africa, South America and Oceania (Saavedra et al, 2015). Biological control is the main approach to reduce damage by exotic insect pests in Eucalyptus (Wingfield et al, 2013). The egg parasitoid Cleruchoides noackae Lin and Huber (Hymenoptera: Mymaridae) is the only available biological control agent used against T. peregrinus (Barbosa et al, 2017)
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