Effect of aqueous extracts of allelopathic crops on germination and growth of Parthenium hysterophorus L.

Javaid, Arshad; Shafique, Shazia; Bajwa, Rukhsana

doi:10.1016/j.sajb.2006.04.006

Cited by 55 publications

(43 citation statements)

References 11 publications

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“…Otros autores habían demostrado anteriormente las propiedades alelopáticas de aceites esenciales y extractos acuosos de diferentes especies y su potencial para el control de arvenses (Dias et al, 1995;Dudai et al, 1999;De Feo et al, 2002;Angelini et al, 2003;Javaid et al, 2006;Azirak y Karaman, 2008;Shafique et al, 2011).…”

Section: Discussionunclassified

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Sancho¹,

Mercedes²

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Section: Discussionunclassified

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Sancho¹,

Mercedes²

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“…Segundo Javaid et al (2006), extratos da parte aérea de sorgo tem maior potencial alelopático do que extratos do sistema radical, provavelemte pela presença de sorgoleone. Para a variável resposta CPA de picão-preto, somente houve ajuste dos dados ao modelo para planta inteira e parte aérea das culturas de cobertura, com exceção de azevém em que somente houve ajuste para parte aérea (Figura 3).…”

Section: Fonte: Elaboração Dos Autoresunclassified

Potencial alelopático de extratos aquosos de culturas de cobertura de solo na germinação e desenvolvimento inicial de Bidens pilosa

Moraes

Agostinetto²,

Panozzo

et al. 2012

Sem. Ci. Agr.

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ResumoObjetivou-se com o trabalho avaliar a influência de extratos de culturas de cobertura de estação estival de inverno sobre o crescimento e desenvolvimento de Bidens pilosa (picão-preto). O delineamento experimental foi inteiramente casualizado, arranjado em esquema fatorial 4 x 3 x 5, com quatro repetições. O fator A foi constituído pelas culturas de cobertura (canola, nabo-forrageiro, trevovesiculoso e azevém), o B pelas partes da planta (planta inteira, parte aérea ou sistema radicular) e o C pelas concentrações dos extratos vegetais (0; 1; 2,5; 5 e 10% peso/volume). Foram avaliados o índice de velocidade de germinação, a percentagem de germinação e comprimento e massa seca da parte aérea e radicular. Os extratos de canola seguidos dos de trevo-vesiculoso, apresentaram maior potencial alelopático. A parte aérea das culturas de cobertura foi a que apresentou a maior atividade alelopática. A atividade alelopática sobre a germinação e o desenvolvimento de picão-preto aumentou com o incremento da concentração dos extratos, das partes vegetais. O índice de velocidade de germinação foi o melhor indicador de atividade alelopática de culturas de cobertura sobre o picão-preto. Palavras-chave: Brassica napus, Raphanus sativus, Trifolium vesiculosum, Lolium multiflorum AbstractThe objective of the study was to evaluate the influence of cover crops extracts on growth and development of Bidens pilosa. The experimental design was completely randomized in factorial scheme 4 x 3 x 5 with four replications. The factor A was composed by cover crops (Brassica napus; Raphanus sativus; Trifolium vesiculosum; Lolium multiflorum), B was parts plants (whole plant, shoot and root system) and C extracts concentrations (0; 1, 2.5, 5 and 10% weight / volume). Variables evaluated were: speed of germination; germination percentage; length and dry matter of shoot and root. Extracts of Brassica napus followed by extracts of Trifolium vesiculosum, in general, had more allelopathic potential. The shoots of the cover crops, presented in general larger allelopathic activity. Allelopathic activity on germination and development of Bidens pilosa increases with the increment of extracts concentration, of differents plants parts. The speed germination is the best indicator of allelopathic activity of cover crops on Bidens pilosa.

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“…Introduction Parthenium (Parthenium hysterophorus L.) is an annual invasive weed of the family Asteraceae. It is native to the subtropics of North and South America, but is now widely distributed in a number of tropical and subtropical countries of the world (Javaid, Shafique, Bajwa, & Shafique, 2006;Navie, McFadyen, Panetta, & Adkins, 1996;Tamado, Schu¨tz, & Milberg, 2002). It is considered a noxious weed because of its allelopathic effect against associated plant species (Singh, Batish, Pandher, & Kohli, 2005) by releasing allelochemicals such as parthenin, coronopilin, tetraneurin A, 2-hydroxycoronopilin and hysterones A-D (Belz, Reinhardt, Foxcroft, & Hurle, 2007;Ramesh et al, 2003;Sethi, Koul, Taneja, & Dhar, 1987).…”

Section: Herbicidal Effects Of Extracts and Residue Incorporation Of mentioning

confidence: 99%

Herbicidal effects of extracts and residue incorporation ofDatura metelagainst parthenium weed

Javaid

Shafique

2010

Natural Product Research

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The present study was designed to evaluate the herbicidal activity of Datura metel against the noxious weed parthenium (Parthenium hysterophorus L.). In a laboratory bioassay, the effect of aqueous, methanol and n-hexane shoot and root extracts of 5, 10, 15 and 20% w/v (on a fresh weight basis) concentration of D. metel were tested against the germination and seedling growth of parthenium. Both aqueous and methanol extracts markedly suppressed the germination and seedling growth of parthenium. Generally, the effect of shoot extracts was more pronounced than the effect of root extracts. In foliar spray bioassay, aqueous and methanol shoot extracts of 10% w/v (on dry weight bases) concentrations were sprayed on one-week and two-week-old pot-grown parthenium seedlings. Two subsequent sprays were carried out at five day intervals each. Both the aqueous as well as the methanol extracts significantly suppressed shoot length as well as shoot and root biomass of one-week and two-week-old parthenium plants. In residue incorporation bioassay, crushed shoots of D. metel were incorporated in the soil at 1, 2, ... 5% w/w. Parthenium seeds were sown one week after residue incorporation and plants were harvested 40 days after sowing. Incorporation of 2-5% residues significantly reduced germination by 47-89%. Residues of 4 and 5% concentration significantly suppressed plant biomass by 90 and 97%, respectively. The present study concludes that root and shoots of D. metel contain herbicidal constituents for the management of parthenium weed.

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Effect of aqueous extracts of allelopathic crops on germination and growth of Parthenium hysterophorus L.

Cited by 55 publications

References 11 publications

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Fitotoxicidad De Aceites Esenciales Y Extractos Acuosos De Plantas Mediterráneas Para El Control De Arvenses

Potencial alelopático de extratos aquosos de culturas de cobertura de solo na germinação e desenvolvimento inicial de Bidens pilosa

Herbicidal effects of extracts and residue incorporation ofDatura metelagainst parthenium weed

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