Efficacy of the entomopathogenic fungus,Paecilomyces fumosoroseus(Wise) Brown and Smith (Ascomycota: Hypocreales) againstGeotrogus deserticola(Coleoptera: Melolonthidae)

Harizia, Abdelkader; Lazreg, Fatiha

doi:10.5958/0974-4576.2016.00041.4

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“…Beauveria bassiana and Metarhizium anisopliae are the most commonly assessed fungi in alternative control of Rhipicephalus microplus, Ixodes scapularis, Dermacentor variabilis and Amblyomma variegatum ticks (Ub and Narladkar, 2018). However, several entomopathogenic fungi as Trichoderma harzianaum, T. virens and Paecelomyces fumosoroseus, have been reported as acaricidal and nematicidal against Cimex hemipterus, Acanthoscelides obtectus, Meloidogyne javanica, Toxocara canis, Geotrogus deserticola and Tetranychus kanzawai (Kiriga et al, 2018, Rodríguez-González et al, 2018, de Souza et al, 2017, Zahran et al, 2017, Harizia and Lazreg, 2016, Sanjaya, 2016. For this reason, due to the potential acaricidal activity of several species of entomopathogenic fungi, the aim of this study was to evaluate the in vitro effectiveness of combined commercial strains against Amblyomma mixtum and R. microplus ticks.…”

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confidence: 99%

ACARICIDAL ACTIVITY OF COMBINED COMMERCIAL STRAINS OF ENTOMOPATHOGENIC FUNGI AGAINST Amblyomma mixtum AND Rhipicephalus microplus TICKS

Salas¹,

Bravo‐Ramos²,

Montes³

et al. 2022

Trop Subtrop Agroecosyst

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Background: Rhipicephalus microplus and Amblyomma mixtum are the most important tick species affecting livestock in tropical areas. They can have a direct harmful effect on cattle and humans due to transmission of pathogens of tick-borne diseases (TBD). Entomopathogenic fungi have an important role in crop pest control. However, data concerning the efficacy of use of entomopathogenic fungicombinations are scarce. Objective: For this reason, in this study, the efficacy of commercial fungal combinations was assessed: Trishok® (Trichoderma harzianaum and Trichoderma virens) and Esporomax® (Beauveria bassiana, Metarhizium anisopliae, Paecelomyces fumosoroseus). Methodology: Adult immersion tests were performed with six different concentrations of fungal solutions. Results: In this study, Trishok® and Esporomax® showed potential efficacy against R. microplus. Different concentrations of fungal application tested on A. mixtum did not show any effect. The observed mortality of R. microplus was 85. 0 ± 2.0 and 65.0 ± 2.0 for Trishok® and Esporomax®, respectively. The estimated LC50 for R. microplus immersed in solutions of Trishok® and Esporomax® thereof were: 6.5x104 and3.9x105 conidia mL-1, respectively. Implications: These results should be considered in the design and implementation of alternatives based on the biological control of ticks. Conclusion: We can conclude that combined commercial strains of entomopathogenic fungi have in vitro acaricidal activity against R. microplus.

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