Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control

Abstract The tick Rhipicephalus microplus poses a serious threat to the cattle industry, resulting in economic losses aggravated by tick resistance to chemical acaricides. Strains of Metarhizium spp., a well-known group of entomopathogenic fungi, can contribute to managing this ectoparasite. We expl...

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Autores principales:	Allan Felipe Marciano, Gabriel Moura Mascarin, Renato Felipe Ferreira Franco, Patrícia Silva Golo, Stefan T. Jaronski, Éverton Kort Kamp Fernandes, Vânia Rita Elias Pinheiro Bittencourt
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1c0626a843c04ba8b7f5ec1d303902ad
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spelling	oai:doaj.org-article:1c0626a843c04ba8b7f5ec1d303902ad2021-12-02T15:53:45ZInnovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control10.1038/s41598-021-84142-82045-2322https://doaj.org/article/1c0626a843c04ba8b7f5ec1d303902ad2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84142-8https://doaj.org/toc/2045-2322Abstract The tick Rhipicephalus microplus poses a serious threat to the cattle industry, resulting in economic losses aggravated by tick resistance to chemical acaricides. Strains of Metarhizium spp., a well-known group of entomopathogenic fungi, can contribute to managing this ectoparasite. We explored two novel granular, microsclerotia- or blastospores-based formulations of Metarhizium robertsii for R. microplus control under semi-field conditions. Fungal persistence in soil was also observed for 336 days. The experiment used pots of Urochloa decumbens cv. Basilisk grass, treated with 0.25 or 0.5 mg of granular formulation/cm2 (25 or 50 kg/ha) applied to the soil surface prior to transferring engorged tick females onto the treated soil. The fungal granules yielded more conidia with subsequent sporulation under controlled indoor conditions than in the outdoor environment, where the levels of fungus rapidly declined over time. Metarhizium-root colonization ranged from 25 to 66.7% depending on the propagule and rate. Fungal formulations significantly reduced the number of tick larvae during the humid season, reaching at least 64.8% relative efficacy. Microsclerotia or blastospores-granular formulations of M. robertsii can reduce the impact of R. microplus, and thus prove to be a promising tool in the control of ticks.Allan Felipe MarcianoGabriel Moura MascarinRenato Felipe Ferreira FrancoPatrícia Silva GoloStefan T. JaronskiÉverton Kort Kamp FernandesVânia Rita Elias Pinheiro BittencourtNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Allan Felipe Marciano Gabriel Moura Mascarin Renato Felipe Ferreira Franco Patrícia Silva Golo Stefan T. Jaronski Éverton Kort Kamp Fernandes Vânia Rita Elias Pinheiro Bittencourt Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
description	Abstract The tick Rhipicephalus microplus poses a serious threat to the cattle industry, resulting in economic losses aggravated by tick resistance to chemical acaricides. Strains of Metarhizium spp., a well-known group of entomopathogenic fungi, can contribute to managing this ectoparasite. We explored two novel granular, microsclerotia- or blastospores-based formulations of Metarhizium robertsii for R. microplus control under semi-field conditions. Fungal persistence in soil was also observed for 336 days. The experiment used pots of Urochloa decumbens cv. Basilisk grass, treated with 0.25 or 0.5 mg of granular formulation/cm2 (25 or 50 kg/ha) applied to the soil surface prior to transferring engorged tick females onto the treated soil. The fungal granules yielded more conidia with subsequent sporulation under controlled indoor conditions than in the outdoor environment, where the levels of fungus rapidly declined over time. Metarhizium-root colonization ranged from 25 to 66.7% depending on the propagule and rate. Fungal formulations significantly reduced the number of tick larvae during the humid season, reaching at least 64.8% relative efficacy. Microsclerotia or blastospores-granular formulations of M. robertsii can reduce the impact of R. microplus, and thus prove to be a promising tool in the control of ticks.
format	article
author	Allan Felipe Marciano Gabriel Moura Mascarin Renato Felipe Ferreira Franco Patrícia Silva Golo Stefan T. Jaronski Éverton Kort Kamp Fernandes Vânia Rita Elias Pinheiro Bittencourt
author_facet	Allan Felipe Marciano Gabriel Moura Mascarin Renato Felipe Ferreira Franco Patrícia Silva Golo Stefan T. Jaronski Éverton Kort Kamp Fernandes Vânia Rita Elias Pinheiro Bittencourt
author_sort	Allan Felipe Marciano
title	Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
title_short	Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
title_full	Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
title_fullStr	Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
title_full_unstemmed	Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control
title_sort	innovative granular formulation of metarhizium robertsii microsclerotia and blastospores for cattle tick control
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1c0626a843c04ba8b7f5ec1d303902ad
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Innovative granular formulation of Metarhizium robertsii microsclerotia and blastospores for cattle tick control

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