Herbicidal Activity of <i>Stylosanthes guianensis</i> and its Phytotoxic Components

Khanh, Tran Dang; Hong, Nguyen Huu; Nhan, Dang Quy; Kim, S. L.; Chung, Ill‐Min; Xuan, Tran Dang

doi:10.1111/j.1439-037x.2006.00232.x

Cited by 18 publications

(12 citation statements)

References 36 publications

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“…In the same context, confertiorin isolated from Ambrosia confertifora has been reported to inhibit the germination of Amaranthus palmeri and Amaranthus retrofexus (Fischer & Mabry, 1985). Moreover, Khanh et al (2006) proved that Stylosanthes guianensis showed significant herbicidal effects against Echinochloa crus-galli and Monochoria vaginalis. They attributed its phytotoxicity to the presence of several allelochemicals in S. guianensis including phenolic acids, coumarin and long-chain fatty acids.…”

Section: Discussionmentioning

confidence: 94%

Phytotoxic effects of Echinochloa colona (L.) Link. (Poaceae) extracts on the germination and seedling growth of weeds

Gomaa

AbdElgawad

2012

Span. j. agric. res.

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This paper aims to study the phytotoxic potential of Echinochloa colona in order to explore its potential as bioherbicide. In this way, the phytotoxic effects of the most active fraction and pure compound from methanol (MeOH) extract of E. colona shoots on germination and seedling growth of ten weed species and on E. colona itself were evaluated. A lettuce seed bioassay indicated that dichloromethane (CH 2 Cl 2 ) soluble fraction of MeOH extract had the most phytotoxic activity. The most phytotoxic active compound of CH 2 Cl 2 fraction was isolated and identified as tricin. ) significantly stimulated germination and seedling growth of some test species. There was no significant effect of the low concentration of tricin (50 µmol L -1 ) on germination and elongation of roots and shoots of species. Higher concentrations of CH 2 Cl 2 fraction (500, 1000 mg L -1 ) and tricin (100, 200 µmol L -1 ) inhibited germination and seedling growth of most species. The results suggest that CH 2 Cl 2 fraction and tricin might be potentially useful as bioherbicide for weed control in agriculture.Additional key words: allelochemicals; bioherbicide; tricin; weed control. ResumenEfectos fitotóxicos de extractos de Echinochloa colona (L.) Link. (Poaceae) sobre la germinación y el crecimiento de plántulas de malas hierbasEn este trabajo se estudia el efecto fitotóxico de la planta Echinochloa colona para explorar su potencial como herbicida natural. Se evaluaron los efectos fitotóxicos de la fracción más activa y del compuesto más puro del extracto de metanol de tallos de E. colona sobre la germinación de semillas y el crecimiento de plántulas de diez malas hierbas incluyendo E. colona. El ensayo biológico en semillas de lechuga indicó que la fracción soluble del diclorometano (CH 2 Cl 2 ) mostró la actividad fitotóxica más importante. Se aisló e identificó el componente activo más fitotóxico del CH 2 Cl 2 , que fue la tricina. La fitotoxicidad de estos compuestos se analizó con tres concentraciones distintas de CH 2 Cl 2 (100, 500 y 1000 mg L -1 ) y tres de tricina (50, 100, 200 µmol L -1 ) sobre la germinación de semillas y el crecimiento de plántulas de las especies Portulaca oleracea, Corchorus olitorius, Brachiaria reptans, Euphorbia heterophylla, Dinebra retroflexa, Hibiscus trionum, Amaranthus graecizans, Amaranthus hybridus, Convolvulus arvensis, Setaria pumila, y también E. colona. La concentración 100 mg L -1 de CH 2 Cl 2 estimuló significativamente la germinación de semillas y el crecimiento de plántulas de algunas de las especies de estudio. No hubo ningún efecto significativo de la concentración 50 µmol L -1 de tricina sobre la germinación de semillas o la elongación de raíces y tallos de las especies. Concentraciones más altas de CH 2 Cl 2 (500, 1000 mg L -1 ) y tricina (100, 200 µmol L -1 ) inhibieron la germinación de semillas y el crecimiento de plántulas de la mayoría de las especies. Los resultados sugieren que la fracción soluble del CH 2 Cl 2 y la tricina podrían ser potencialmente empleadas como herbicida...

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Section: Discussionmentioning

confidence: 94%

Phytotoxic effects of Echinochloa colona (L.) Link. (Poaceae) extracts on the germination and seedling growth of weeds

Gomaa

AbdElgawad

2012

Span. j. agric. res.

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“…It has been suggested that the application of plants with strong allelopathic properties as a natural herbicide for weed management and reducing the reliance on chemical herbicides could be a feasible solution (Khanh et al 2006). Allelopathy is defined as an interaction among plants by chemical pathways.…”

Section: Allelopathic Effect Of Methanol Extracts From Tinospora Tubementioning

confidence: 99%

Allelopathic effect of methanol extracts fromTinospora tuberculataon selected crops and rice weeds

Aslani

Juraimi

Ahmad-Hamdani

et al. 2014

Acta Agriculturae Scandinavica, Section B — Soil & Plant Sc

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Herbicidal potential of aerial parts of Tinospora tuberculata on germination and seedling growth of seven test plant species, namely rice (Oryza sativa L.); two rice weeds, barnyardgrass (Echinochloa crus-galli L.) and weedy rice (O. sativa f. spontanea); and four vegetable crops, lettuce (Lactuca sativa L.), tomato (Solanum lycopersicum L.), carrot (Daucus carota L.), and cucumber (Cucumis sativus L.) were evaluated. Six concentrations of methanol extract (3.12, 6.25, 12.5, 25, 50, and 100 g L −1 ) were compared with the control (distilled water). The rate of seed germination and the radicle and hypocotyl length of 7-day-old test plant seedlings were reduced as the concentration of extracts increased compared to the control. Generally, the degree of toxicity of extracts derived from the leaves was more than the extracts derived from the stem. Cluster analysis and the concentrations required for 50% inhibition (defined as EC 50 ) of all parameters showed that radicle growth was more suppressed than germination and hypocotyl growth. Lettuce and carrot were observed as the most sensitive plants while rice showed the highest tolerance to both extracts. Moreover, the dicot target plants were affected more severely than the monocots when treated with leaf extract. The chemical composition of the T. tuberculata methanolic extracts was analyzed by a GC-MS system. A total of 92 and 22 constituents (not previously identified) were found in the leaves and stem, respectively. The results showed that 17 of the 92 components in the leaves, as compared to 4 of 22 compounds in the stem, are known as toxic compounds. These results suggest that T. tuberculata contains a significant source of plant growth inhibitors with potential for the development of future natural herbicide.

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“…Applying kava root ( Piper methysticum L.) (Xuan et al . 2003), Stylosanthes guianensis Sw. (Khanh et al . 2006), Saururaceae ( Houttuynia cordata Thunb) (Lin et al .…”

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confidence: 99%

Effects of Aglaia odorata granules on the seedling growth of major maize weeds and the influence of soil type on the granule residue's efficacy

Laosinwattana¹,

Teerarak²,

Charoenying

2012

Weed Biology and Management

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This study was undertaken to explore the potential of Aglaia odorata Lour. granules in various soil types (sand, sandy loam and clay) at 0.25, 0.5 and 1 t ai ha -1 to inhibit two major maize weeds, Digitaria adscendens and Trianthema portulacastrum L., in an experimental greenhouse.The results indicated that the emergence and seedling growth of both weeds were inhibited but varied with the soil type: the inhibitory effect of the A. odorata granules was stronger when applied in sand, followed by sandy loam and clay. The weed species responded differently to the A. odorata granule application. Generally, the inhibitory effect was greater for D. adscendens than for T. portulacastrum. Additionally, the potential of the A. odorata granules for weed control in maize field plots was evaluated. The three major weeds that were found in the experimental field were D. adscendens, T. portulacastrum and Amaranthus gracilis.The highest A. odorata granule dose (1 t ai ha -1 ) had a significant inhibitory effect on the emergence and growth of all of the weed species and their emergence was reduced by 96.7%, 47.2% and 56.2%, respectively, compared with the control treatment (unweeded).The dry weight of the weeds was reduced in a similar manner to their emergence. In contrast, the emergence of maize was not affected by any of the A. odorata granule applications. Rather, at an application rate of 1 t ai ha -1 , the maize yield increased significantly and the effect was similar to that observed with an atrazine herbicide application under field conditions.

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Herbicidal Activity of Stylosanthes guianensis and its Phytotoxic Components

Cited by 18 publications

References 36 publications

Phytotoxic effects of Echinochloa colona (L.) Link. (Poaceae) extracts on the germination and seedling growth of weeds

Phytotoxic effects of Echinochloa colona (L.) Link. (Poaceae) extracts on the germination and seedling growth of weeds

Allelopathic effect of methanol extracts fromTinospora tuberculataon selected crops and rice weeds

Effects of Aglaia odorata granules on the seedling growth of major maize weeds and the influence of soil type on the granule residue's efficacy

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