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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
04/09/2023 |
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Data da última atualização: |
04/09/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
PAIXÃO, F. R. S. da; MUNIZ, E. R.; CATÃO, A. M. L.; SANTOS, T. R.; LUZ, C.; MARRETO, R. N.; MASCARIN, G. M.; FERNANDES, É. K. K. |
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Afiliação: |
FLÁVIA REGINA SANTOS DA PAIXÃO, UNIVERSIDADE FEDERAL DE GOIÁS; ELEN REGOZINO MUNIZ, UNIVERSIDADE FEDERAL DE GOIÁS; ALAINE MARIA LOPES CATÃO, UNIVERSIDADE FEDERAL DE GOIÁS; THAINÁ RODRIGUES SANTOS, UNIVERSIDADE FEDERAL DE GOIÁS; CHRISTIAN LUZ, UNIVERSIDADE FEDERAL DE GOIÁS; RICARDO NEVES MARRETO, UNIVERSIDADE FEDERAL DE GOIÁS; GABRIEL MOURA MASCARIN, CNPMA; ÉVERTON KORT KAMP FERNANDES, UNIVERSIDADE FEDERAL DE GOIÁS. |
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Título: |
Microsclerotial pellets of Metarhizium spp.: thermotolerance and bioefficacy against the cattle tick. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Applied Microbiology and Biotechnology, v. 107, n. 7-8, p. 2263-2275, 2023. |
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ISSN: |
0175-7598 |
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DOI: |
https://doi.org/10.1007/s00253-023-12467-7 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: The cattle tick, Rhipicephalus microplus (Acari: Ixodidae), is a multi-billion dollar ectoparasite of global importance affecting beef and milk production. Submerged cultures of cosmopolitan entomopathogenic fungal species of the genus Metarhizium typically produce microsclerotia that provide both long-term survival and environmental resistance. Microsclerotia hold great potential as an unconventional active propagule to control this tick under laboratory and semi-field conditions. However, heat stress caused especially by elevated temperatures poses a critical environmental constraint for the successful development and efficacy of microsclerotia under tropical conditions. First, we screened six strains of Metarhizium anisopliae, Metarhizium robertsii and Metarhizium humberi for their ability to produce microsclerotia by submerged liquid cultivation. In addition, we assessed the biological fitness and bioefficacy of dried microsclerotial pellets under amenable (27 °C) and heat-stressed (32 °C) incubation against engorged adult females of R. microplus. Microsclerotia in pelletized formulation prepared with carriers based on diatomaceous earth and microcrystalline cellulose exhibited conidial production at different extents according to the fungal strain and the incubation temperature, but most strains displayed reduced sporogenesis when exposed to 32 °C. Engorged tick females exposed to sporulated microsclerotia from pelletized M. anisopliae CG47 or IP 119 had fewer number of hatching larvae in comparison to the control group, irrespective of the incubation temperature tested. The minimum dosage of microsclerotial pellets that effectively reduced hatchability of tick larvae was estimated to be 2 mg per plate (equivalent to 6.0 kg per hectare). Metarhizium microsclerotial pellets exhibited significant tolerance to 32 °C and pronounced acaricidal activity against this economically important ectoparasite of cattle, even under simulated environmental heat stress. MenosAbstract: The cattle tick, Rhipicephalus microplus (Acari: Ixodidae), is a multi-billion dollar ectoparasite of global importance affecting beef and milk production. Submerged cultures of cosmopolitan entomopathogenic fungal species of the genus Metarhizium typically produce microsclerotia that provide both long-term survival and environmental resistance. Microsclerotia hold great potential as an unconventional active propagule to control this tick under laboratory and semi-field conditions. However, heat stress caused especially by elevated temperatures poses a critical environmental constraint for the successful development and efficacy of microsclerotia under tropical conditions. First, we screened six strains of Metarhizium anisopliae, Metarhizium robertsii and Metarhizium humberi for their ability to produce microsclerotia by submerged liquid cultivation. In addition, we assessed the biological fitness and bioefficacy of dried microsclerotial pellets under amenable (27 °C) and heat-stressed (32 °C) incubation against engorged adult females of R. microplus. Microsclerotia in pelletized formulation prepared with carriers based on diatomaceous earth and microcrystalline cellulose exhibited conidial production at different extents according to the fungal strain and the incubation temperature, but most strains displayed reduced sporogenesis when exposed to 32 °C. Engorged tick females exposed to sporulated microsclerotia from pelletized M. anisopliae CG47 or IP 119 had fewer... Mostrar Tudo |
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Palavras-Chave: |
Ectoparasite; Fungal entomopathogen; Fungal propagule. |
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Thesagro: |
Calor; Carrapato; Fungo Para Controle Biológico. |
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Thesaurus Nal: |
Biological control agents; Entomopathogenic fungi; Heat stress; Metarhizium. |
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Categoria do assunto: |
S Ciências Biológicas |
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Marc: |
LEADER 03074naa a2200349 a 4500
001 2156386
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008 2023 bl uuuu u00u1 u #d
022 $a0175-7598
024 7 $ahttps://doi.org/10.1007/s00253-023-12467-7$2DOI
100 1 $aPAIXÃO, F. R. S. da
245 $aMicrosclerotial pellets of Metarhizium spp.$bthermotolerance and bioefficacy against the cattle tick.$h[electronic resource]
260 $c2023
520 $aAbstract: The cattle tick, Rhipicephalus microplus (Acari: Ixodidae), is a multi-billion dollar ectoparasite of global importance affecting beef and milk production. Submerged cultures of cosmopolitan entomopathogenic fungal species of the genus Metarhizium typically produce microsclerotia that provide both long-term survival and environmental resistance. Microsclerotia hold great potential as an unconventional active propagule to control this tick under laboratory and semi-field conditions. However, heat stress caused especially by elevated temperatures poses a critical environmental constraint for the successful development and efficacy of microsclerotia under tropical conditions. First, we screened six strains of Metarhizium anisopliae, Metarhizium robertsii and Metarhizium humberi for their ability to produce microsclerotia by submerged liquid cultivation. In addition, we assessed the biological fitness and bioefficacy of dried microsclerotial pellets under amenable (27 °C) and heat-stressed (32 °C) incubation against engorged adult females of R. microplus. Microsclerotia in pelletized formulation prepared with carriers based on diatomaceous earth and microcrystalline cellulose exhibited conidial production at different extents according to the fungal strain and the incubation temperature, but most strains displayed reduced sporogenesis when exposed to 32 °C. Engorged tick females exposed to sporulated microsclerotia from pelletized M. anisopliae CG47 or IP 119 had fewer number of hatching larvae in comparison to the control group, irrespective of the incubation temperature tested. The minimum dosage of microsclerotial pellets that effectively reduced hatchability of tick larvae was estimated to be 2 mg per plate (equivalent to 6.0 kg per hectare). Metarhizium microsclerotial pellets exhibited significant tolerance to 32 °C and pronounced acaricidal activity against this economically important ectoparasite of cattle, even under simulated environmental heat stress.
650 $aBiological control agents
650 $aEntomopathogenic fungi
650 $aHeat stress
650 $aMetarhizium
650 $aCalor
650 $aCarrapato
650 $aFungo Para Controle Biológico
653 $aEctoparasite
653 $aFungal entomopathogen
653 $aFungal propagule
700 1 $aMUNIZ, E. R.
700 1 $aCATÃO, A. M. L.
700 1 $aSANTOS, T. R.
700 1 $aLUZ, C.
700 1 $aMARRETO, R. N.
700 1 $aMASCARIN, G. M.
700 1 $aFERNANDES, É. K. K.
773 $tApplied Microbiology and Biotechnology$gv. 107, n. 7-8, p. 2263-2275, 2023.
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