Susceptibility of Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae), a Eucalyptus pest, to entomopathogenic fungi

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 × 10 8 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.

Potential of Beauveria bassiana formulations to control Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae)

“…In other studies, isolates of B. bassiana and Isaria sp. have also been reported to be pathogenic to T. peregrinus under laboratory conditions similar and using the same concentration similar to the present research (Lorencetti et al, 2018;Santos et al, 2018;Soliman et al, 2019 Research, Society and Development, v. 9, n. 10, e969108097, 2020(CC BY 4.0) | ISSN 2525-3409 | DOI: http://dx.doi.org/10.33448/rsd-v9i10.8097 al., (2020 studying the virulence of different isolates of B. bassiana of T. peregrinus found that the accumulated mortality of 60% for IBCB01, 64% for IBCB66, 68% for IBCB35 and IBCB18 and 84% for JAB06 in adults, after 10 days, using the same concentration tested in this study and under laboratory conditions similar. Thus proving, the efficiency of these entomopathogenic fungi in the control of this forest pest.…”

“…The leaves coupled to the glass were placed inside sterile boxes of transparent polystyrene, gerbox-type (11 cm × 11 cm × 3.5 cm), which were replaced every 3 days, and received no further treatment (Soliman et al, 2019;.…”

“…This fungus has already been registered as causing epizootics in adults of T. peregrinus in the field (Lorencetti et al, 2017). Infection of the insects occurs via the integumentary, oral and respiratory systems when the conidia of the fungus adhere to the cuticle of the insect (Ortiz-Urquiza & Keyhani, 2013;Soliman et al, 2019), which is an advantage when compared to other entomopathogens. In addition to causing insect mortality (Lorencetti et al, 2018), this fungus can induce resistance in plants.…”

Fungos: Biodiversidade E Biotecnologia, Um Breve Panorama

“…No meio agrícola, técnicas de controle biológico vem sendo amplamente utilizadas com sucesso. Nesse contexto, destaca-se o fundo Metarhizium anisopliae, devido seu potencial entomopatogênico, que interfere com eficiência no desenvolvimento de diversos insetos pragas, como lepidópteros e coleópteros (SOLIMAN et al, 2019;SIMI et al, 2018). Caracterizada como uma das principais culturas agrícolas de regiões tropicais, os canaviais correspondem a terceira maior área de cultivo brasileiro (estando atrás da soja e milho).…”

IDENTIFICAÇÃO POLIFÁSICA DE ISOLADOS CLÍNICOS DO COMPLEXO Candida Parapsilosis

“…No meio agrícola, técnicas de controle biológico vem sendo amplamente utilizadas com sucesso. Nesse contexto, destaca-se o fundo Metarhizium anisopliae, devido seu potencial entomopatogênico, que interfere com eficiência no desenvolvimento de diversos insetos pragas, como lepidópteros e coleópteros (SOLIMAN et al, 2019;SIMI et al, 2018).…”