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Registro Completo |
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
04/09/2018 |
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Data da última atualização: |
30/11/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
VARGAS, L. A.; PASSOS, A. M. A. dos; KARAM, D. |
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Afiliação: |
Universidade Federal de Rondônia; ALEXANDRE MARTINS ABDAO DOS PASSOS, CNPMS; DECIO KARAM, CNPMS. |
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Título: |
Allelopathic potential of cover crops in control of shrubby false buttonweed (Spermacoce verticillata). |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Planta Daninha, Viçosa, MG, v. 36, article e018173359, 2018. |
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DOI: |
10.1590/S0100-83582018360100052 |
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Idioma: |
Inglês |
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Conteúdo: |
Searching for alternatives to deal with weeds without the exclusive use of herbicides can increase the sustainability of agricultural production in the Amazon region. This study aimed to evaluate the allelopathic potential of cover crops on the weed shrubby false buttonweed (Spermacoce verticillata L.). Three straw levels (1; 2.5 and 5 mg cm-2) of thirteen cover crops (Cajanus cajan, Canavalia ensiformis, Crotalaria juncea, C. ochroleuca, C. spectabilis, Mucuna aterrima, M. cinereum, Pennisetum glaucum, Sorghum bicolor, S. sudanense, Urochloa brizanha cv. Xaraés, U. brizantha cv. Piatã and U. ruziziensis) were assessed on germination and initial growth of weed and lettuce. We carried out two experiments (weed and lettuce) in a factorial scheme (cover crops x straw levels) with additional treatment (control without straw) in a completely randomized experimental design, with four replicates. The straw of the cover crops inhibited the germination and initial growth of the target plants. The highest straw levels promoted 44.0 and 78.8% reductions in radicle length in relation to the lowest dose (1 mg cm-2), for lettuce and Spermacoce verticillata, respectively. The highest sensitivity to allelochemicals occurred on the radicle. The major suppressive effects on weed germination were promoted by Cajanus cajan, Urochloa brizanha cv. Xaraés, Mucuna cinereum, M. aterrima, Canavalia ensiformis, Crotalaria juncea, C. spectabilis and U. ruziziensis. Cover crops use is an integrated practice management to control Spermacoce verticillata under no-tillage system. MenosSearching for alternatives to deal with weeds without the exclusive use of herbicides can increase the sustainability of agricultural production in the Amazon region. This study aimed to evaluate the allelopathic potential of cover crops on the weed shrubby false buttonweed (Spermacoce verticillata L.). Three straw levels (1; 2.5 and 5 mg cm-2) of thirteen cover crops (Cajanus cajan, Canavalia ensiformis, Crotalaria juncea, C. ochroleuca, C. spectabilis, Mucuna aterrima, M. cinereum, Pennisetum glaucum, Sorghum bicolor, S. sudanense, Urochloa brizanha cv. Xaraés, U. brizantha cv. Piatã and U. ruziziensis) were assessed on germination and initial growth of weed and lettuce. We carried out two experiments (weed and lettuce) in a factorial scheme (cover crops x straw levels) with additional treatment (control without straw) in a completely randomized experimental design, with four replicates. The straw of the cover crops inhibited the germination and initial growth of the target plants. The highest straw levels promoted 44.0 and 78.8% reductions in radicle length in relation to the lowest dose (1 mg cm-2), for lettuce and Spermacoce verticillata, respectively. The highest sensitivity to allelochemicals occurred on the radicle. The major suppressive effects on weed germination were promoted by Cajanus cajan, Urochloa brizanha cv. Xaraés, Mucuna cinereum, M. aterrima, Canavalia ensiformis, Crotalaria juncea, C. spectabilis and U. ruziziensis. Cover crops use is an integrated prac... Mostrar Tudo |
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Palavras-Chave: |
Método sanduíche. |
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Thesagro: |
Alelopatia; Erva Daninha; Leguminosa; Palha; Planta de Cobertura; Vassourinha. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/182425/1/Allelopathic-potential.pdf
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Marc: |
LEADER 02308naa a2200241 a 4500
001 2095052
005 2018-11-30
008 2018 bl uuuu u00u1 u #d
024 7 $a10.1590/S0100-83582018360100052$2DOI
100 1 $aVARGAS, L. A.
245 $aAllelopathic potential of cover crops in control of shrubby false buttonweed (Spermacoce verticillata).$h[electronic resource]
260 $c2018
520 $aSearching for alternatives to deal with weeds without the exclusive use of herbicides can increase the sustainability of agricultural production in the Amazon region. This study aimed to evaluate the allelopathic potential of cover crops on the weed shrubby false buttonweed (Spermacoce verticillata L.). Three straw levels (1; 2.5 and 5 mg cm-2) of thirteen cover crops (Cajanus cajan, Canavalia ensiformis, Crotalaria juncea, C. ochroleuca, C. spectabilis, Mucuna aterrima, M. cinereum, Pennisetum glaucum, Sorghum bicolor, S. sudanense, Urochloa brizanha cv. Xaraés, U. brizantha cv. Piatã and U. ruziziensis) were assessed on germination and initial growth of weed and lettuce. We carried out two experiments (weed and lettuce) in a factorial scheme (cover crops x straw levels) with additional treatment (control without straw) in a completely randomized experimental design, with four replicates. The straw of the cover crops inhibited the germination and initial growth of the target plants. The highest straw levels promoted 44.0 and 78.8% reductions in radicle length in relation to the lowest dose (1 mg cm-2), for lettuce and Spermacoce verticillata, respectively. The highest sensitivity to allelochemicals occurred on the radicle. The major suppressive effects on weed germination were promoted by Cajanus cajan, Urochloa brizanha cv. Xaraés, Mucuna cinereum, M. aterrima, Canavalia ensiformis, Crotalaria juncea, C. spectabilis and U. ruziziensis. Cover crops use is an integrated practice management to control Spermacoce verticillata under no-tillage system.
650 $aAlelopatia
650 $aErva Daninha
650 $aLeguminosa
650 $aPalha
650 $aPlanta de Cobertura
650 $aVassourinha
653 $aMétodo sanduíche
700 1 $aPASSOS, A. M. A. dos
700 1 $aKARAM, D.
773 $tPlanta Daninha, Viçosa, MG$gv. 36, article e018173359, 2018.
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Registro original: |
Embrapa Milho e Sorgo (CNPMS) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Meio Ambiente. Para informações adicionais entre em contato com cnpma.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
05/09/1995 |
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Data da última atualização: |
19/01/2017 |
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Autoria: |
CAPALBO, D. M. F.; MORAES, I. O.; MORAES, R. O. |
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Afiliação: |
DEISE MARIA FONTANA CAPALBO, CNPMA; IRACEMA O. MORAES, UNESP; REGINA O. MORAES, UNICAMP. |
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Título: |
Development of a bioreactor for semi-solid fermentation purposes: bacterial insecticide fermentation. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
In: PROCEEDINGS OF THE INTERNATIONAL CONGRESS ON ENGINEERING AND FOOD,6., 1994, London. London: Blackie, 1994. |
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Páginas: |
p.606-608 |
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Idioma: |
Inglês |
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Conteúdo: |
The development of Bacillus thuringiensis to obtain bacterial insecticide was well studied in Brazil. In the submerged process it was studied in a 250-liter fermentor, that is semi-pilot size production, and offers the opportunity to scale up to a commercial scale. When comparing with semi-solid processes, it can be concluded that in developing countries this is a lower cost process that uses cheaper sources of carbohydrates and proteins available in those regions. Threfore, it was decided to study parameters and variables to solve the difficulties encountered in this process. Heat and mass transfer, and sterility level are important engineering aspects to be considered. Yield and productivity are fundamental to cost studies and make the semi-solid process more feasible in developing countries, using a properly designed bioreactor. |
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Palavras-Chave: |
Biocontrol agent; Bioinsecticide; Bioreactor; Bt spores; Production; Submerged fermentation process; Substrates. |
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Thesagro: |
Bacillus Thuringiensis. |
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Thesaurus NAL: |
biological control. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01683naa a2200265 a 4500
001 1012300
005 2017-01-19
008 1994 bl uuuu u00u1 u #d
100 1 $aCAPALBO, D. M. F.
245 $aDevelopment of a bioreactor for semi-solid fermentation purposes$bbacterial insecticide fermentation.$h[electronic resource]
260 $c1994
300 $ap.606-608
520 $aThe development of Bacillus thuringiensis to obtain bacterial insecticide was well studied in Brazil. In the submerged process it was studied in a 250-liter fermentor, that is semi-pilot size production, and offers the opportunity to scale up to a commercial scale. When comparing with semi-solid processes, it can be concluded that in developing countries this is a lower cost process that uses cheaper sources of carbohydrates and proteins available in those regions. Threfore, it was decided to study parameters and variables to solve the difficulties encountered in this process. Heat and mass transfer, and sterility level are important engineering aspects to be considered. Yield and productivity are fundamental to cost studies and make the semi-solid process more feasible in developing countries, using a properly designed bioreactor.
650 $abiological control
650 $aBacillus Thuringiensis
653 $aBiocontrol agent
653 $aBioinsecticide
653 $aBioreactor
653 $aBt spores
653 $aProduction
653 $aSubmerged fermentation process
653 $aSubstrates
700 1 $aMORAES, I. O.
700 1 $aMORAES, R. O.
773 $tIn: PROCEEDINGS OF THE INTERNATIONAL CONGRESS ON ENGINEERING AND FOOD,6., 1994, London. London: Blackie, 1994.
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