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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
23/05/2023 |
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Data da última atualização: |
27/09/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
AJULO, A. A.; ASOBIA, W. C.; OLIVEIRA, R. S. de; BEZERRA, G. de A.; GONÇALVES, A. R.; FILIPPI, M. C. C. de. |
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Afiliação: |
AKINTUNDE ABIODUN AJULO, UNIVERSIDADE FEDERAL DE GOIÁS; WILL CHUKWUMA ASOBIA, UNIVERSIDADE FEDERAL DE GOIÁS; RODRIGO SILVA DE OLIVEIRA, UNIVERSIDADE FEDERAL DE GOIÁS; GUSTAVO DE ANDRADE BEZERRA, Hubio Biopar Agro, Uberlândia-MG; ARIANY ROSA GONÇALVES, bolsista CNPAF; MARTA CRISTINA CORSI DE FILIPPI, CNPAF. |
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Título: |
Screening bacterial isolates for biocontrol of sheath blight in rice plants. |
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Ano de publicação: |
2023 |
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Fonte/Imprenta: |
Journal of Environmental Science and Health, Part B, v. 58, n. 5, p. 426-435, 2023. |
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DOI: |
https://doi.org/10.1080/03601234.2023.2220644 |
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Idioma: |
Inglês |
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Conteúdo: |
Sheath blight (Rhizoctonia solani) causes significant yield losses in rice (Oryza sativa L.). Its sustainable management needs an efficient biocontrol agent. The objective was to screen bacterial isolates as an antagonist to R. solani and identify the most efficient ones as sheath blight suppressors under greenhouse conditions. Two assays (E1 and E2) were performed in a completely randomized design with three replications. E1 tested 21 bacterial isolates antagonists to R. solani in vitro. E2 was conducted under greenhouse conditions, with rice cultivar BRS Pampeira sown in plastic pots (7 kg) containing fertilized soil. Sixty old plants were inoculated with a segment of a toothpick containing fragments of R. solani, followed by spray inoculation of a bacterial suspension (108 CFU/mL). The severity of the disease was determined by calculating the relative lesion size formed on the colm. Isolates BRM32112 (Pseudomonas nitroreducens), BRM65929 (Priestia megaterium), and BRM65919 (Bacillus cereus) reduced R. solani colony radial growth by 92.8, 77.56, and 75.56%, respectively while BRM63523 (Serratia marcescens), BRM65923 and BRM65916 (P. megaterium) and BRM65919 (B. cereus) with 23.45, 23.37, 23.62, and 20.17 cm, respectively were effective at suppressing sheat. |
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Palavras-Chave: |
Bioagents; Biocontrol. |
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Thesagro: |
Arroz; Inoculação; Oryza Sativa; Rhizoctonia Solani. |
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Thesaurus Nal: |
Crop losses; Inoculation methods; Rice. |
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Categoria do assunto: |
H Saúde e Patologia |
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Marc: |
LEADER 02174naa a2200301 a 4500
001 2153941
005 2023-09-27
008 2023 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1080/03601234.2023.2220644$2DOI
100 1 $aAJULO, A. A.
245 $aScreening bacterial isolates for biocontrol of sheath blight in rice plants.$h[electronic resource]
260 $c2023
520 $aSheath blight (Rhizoctonia solani) causes significant yield losses in rice (Oryza sativa L.). Its sustainable management needs an efficient biocontrol agent. The objective was to screen bacterial isolates as an antagonist to R. solani and identify the most efficient ones as sheath blight suppressors under greenhouse conditions. Two assays (E1 and E2) were performed in a completely randomized design with three replications. E1 tested 21 bacterial isolates antagonists to R. solani in vitro. E2 was conducted under greenhouse conditions, with rice cultivar BRS Pampeira sown in plastic pots (7 kg) containing fertilized soil. Sixty old plants were inoculated with a segment of a toothpick containing fragments of R. solani, followed by spray inoculation of a bacterial suspension (108 CFU/mL). The severity of the disease was determined by calculating the relative lesion size formed on the colm. Isolates BRM32112 (Pseudomonas nitroreducens), BRM65929 (Priestia megaterium), and BRM65919 (Bacillus cereus) reduced R. solani colony radial growth by 92.8, 77.56, and 75.56%, respectively while BRM63523 (Serratia marcescens), BRM65923 and BRM65916 (P. megaterium) and BRM65919 (B. cereus) with 23.45, 23.37, 23.62, and 20.17 cm, respectively were effective at suppressing sheat.
650 $aCrop losses
650 $aInoculation methods
650 $aRice
650 $aArroz
650 $aInoculação
650 $aOryza Sativa
650 $aRhizoctonia Solani
653 $aBioagents
653 $aBiocontrol
700 1 $aASOBIA, W. C.
700 1 $aOLIVEIRA, R. S. de
700 1 $aBEZERRA, G. de A.
700 1 $aGONÇALVES, A. R.
700 1 $aFILIPPI, M. C. C. de
773 $tJournal of Environmental Science and Health, Part B$gv. 58, n. 5, p. 426-435, 2023.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
12/03/2013 |
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Data da última atualização: |
29/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SOSA-GÓMEZ, D. R.; MIRANDA, J. E. |
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Afiliação: |
DANIEL RICARDO SOSA GOMEZ, CNPSO; JOSE EDNILSON MIRANDA, CNPA. |
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Título: |
Fitness cost of resistance to bacillus thuringiensisin velvetbean caterpillar anticarsia gemmatalishübner (lepidoptera, noctuidae). |
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Ano de publicação: |
2012 |
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Fonte/Imprenta: |
Revista Brasileira de Entomologia, v. 56, n. 3, p. 359-362, Set. 2012. |
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Série: |
0085-5626 |
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Idioma: |
Inglês |
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Conteúdo: |
Selection pressure to obtain resistant genotypes can result in fitness cost. In this study, we report the effects of the selection pressure of a commercial formulation of Bacillus thuringiensis on biological aspects of a Dipel-resistant strain of velvetbean caterpillar, Anticarsia gemmatalis Hübner. Comparisons of Dipel-resistant and susceptible individuals revealed significant differences in pupal weight and larval development time. Both strains (Dipel-resistant and susceptible) were susceptible to Cry1Ac toxin expressed in foliar cotton tissues. Resistant and susceptible strains showed low survival rates of 22.5% and 51.2%, respectively, when fed with Greene diet containing Bt-cotton. Larvae bioassayed after three laboratory generations presented lower survival and less instar numbers than individuals maintained in the laboratory for more than 144 generations. Pupal weight was 9.4% lower and larval development time was 1.9 days longer in the resistant population than in the susceptible strain. Other parameters, such as duration of pupal stage, adult longevity, number of eggs per female, oviposition period, and egg fertility, remained unaffected. Keywords: Anticarsia gemmatalis; toxin; Cry1Ac; Dipel-resistant; strain. |
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Palavras-Chave: |
Cry1 Ac; Dipel. |
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Thesagro: |
Anticarsia Gemmatalis; Raça; Soja; Toxina. |
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Thesaurus NAL: |
Anticarsia; Soybeans; Toxins. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/78841/1/ID-34337.pdf
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Marc: |
LEADER 01975naa a2200253 a 4500
001 1952776
005 2022-04-29
008 2012 bl uuuu u00u1 u #d
100 1 $aSOSA-GÓMEZ, D. R.
245 $aFitness cost of resistance to bacillus thuringiensisin velvetbean caterpillar anticarsia gemmatalishübner (lepidoptera, noctuidae).$h[electronic resource]
260 $c2012
490 $a0085-5626
520 $aSelection pressure to obtain resistant genotypes can result in fitness cost. In this study, we report the effects of the selection pressure of a commercial formulation of Bacillus thuringiensis on biological aspects of a Dipel-resistant strain of velvetbean caterpillar, Anticarsia gemmatalis Hübner. Comparisons of Dipel-resistant and susceptible individuals revealed significant differences in pupal weight and larval development time. Both strains (Dipel-resistant and susceptible) were susceptible to Cry1Ac toxin expressed in foliar cotton tissues. Resistant and susceptible strains showed low survival rates of 22.5% and 51.2%, respectively, when fed with Greene diet containing Bt-cotton. Larvae bioassayed after three laboratory generations presented lower survival and less instar numbers than individuals maintained in the laboratory for more than 144 generations. Pupal weight was 9.4% lower and larval development time was 1.9 days longer in the resistant population than in the susceptible strain. Other parameters, such as duration of pupal stage, adult longevity, number of eggs per female, oviposition period, and egg fertility, remained unaffected. Keywords: Anticarsia gemmatalis; toxin; Cry1Ac; Dipel-resistant; strain.
650 $aAnticarsia
650 $aSoybeans
650 $aToxins
650 $aAnticarsia Gemmatalis
650 $aRaça
650 $aSoja
650 $aToxina
653 $aCry1 Ac
653 $aDipel
700 1 $aMIRANDA, J. E.
773 $tRevista Brasileira de Entomologia$gv. 56, n. 3, p. 359-362, Set. 2012.
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