Use of Allelopathy in Agriculture

Khalid, Shahida; Ahmad, Touqeer; Shad, R. A.

doi:10.3923/ajps.2002.292.297

Cited by 45 publications

(19 citation statements)

References 40 publications

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“…In this study, leaves were used for the determination of any phytotoxic effects of C. manghas. Leaves were selected for the bioassays rather than other plant parts because they are a primary source of allelopathic compounds [4,6].…”

Section: Discussionmentioning

confidence: 99%

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Phytotoxic effects of Cerbera manghas L. leaf extracts on seedling elongation of four monocot and four dicot test species

Bari

Kato‐Noguchi

2017

Acta Agrobot

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Exploration of allelochemicals with phytotoxic effects is intended to minimize a current dependency on synthetic herbicides in weed management. Several allelochemicals from the tropical tree Cerbera manghas (sea mango) have been reported as termiticides and bactericides. The present study investigated possible phytotoxic effects of C. manghas leaf extracts under laboratory conditions. Four monocots: barnyard grass (Echinochloa crus-galli), foxtail fescue (Vulpia myuros), Italian ryegrass (Lolium multiflorum), and timothy (Phleum pratense) and four dicots: alfalfa (Medicago sativa), garden cress (Lepidium sativum), lettuce (Lactuca sativa), and rapeseed (Brassica napus) were used as test species. Elongation of both shoots and roots of seedlings was measured to assess any phytotoxic effects. The results showed that the sensitivities of shoots and roots were different between the test species, and the inhibition of seedling elongation significantly increased with increasing concentration of leaf extracts of C. manghas for all the test species. The IC50 (50% inhibitory concentration) values showed that 8.50–32.30 and 4.26–34.67 mg dry weight equivalent extract mL−1 of C. manghas inhibited seedling elongation by 50%, for shoots and roots respectively. Isolation and identification of the phytotoxic substances from C. manghas are suggested for future investigation.

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Section: Discussionmentioning

confidence: 99%

“…all parts of the source plant including leaves, roots, stems, seeds, and flowers of living plants or even plant litter [6].…”

Section: Digital Signaturementioning

confidence: 99%

Phytotoxic effects of Cerbera manghas L. leaf extracts on seedling elongation of four monocot and four dicot test species

Bari

Kato‐Noguchi

2017

Acta Agrobot

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“…Allelopathy is a direct or indirect, beneficial or harmful effect of one plant on another through the production of secondary compounds (allelochemicals) and their release into the environment in sufficient quantity to cause recordable effects (Cheema et al, 1998;Khalid et al, 2002;Aleksieva and Serafimov, 2008). Allelochemicals are synthesized and accumulated in different plant parts (root, stem, leaves, flowers and fruits, etc.)…”

Section: Introductionmentioning

confidence: 99%

Allelopathic effects of water extracts of Sorghum halepense (L.) Pers., Convolvulus arvensis L. and Cirsium arvense Scop. on early seedling growth of some leguminous crops

Golubinova

Ilieva

2014

Pesticidi i fitomedicina

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SUMMARYIn order to study the allelopathic effect of aboveground dry biomass of Sorghum halepense, Convolvulus arvensis and Cirsium arvense on seed germination and early seedling growth of Pisum sativum (L.), varieties Mir (winter form) and Kerpo (spring form); Vicia sativa (L.), variety Tempo, and Medicago sativa (L.), variety Dara, a laboratory experiment was conducted at the Institute of Forage Crops -Pleven. Four concentrations: 1.25, 2.5, 5.0 and 10.0% were applied to each weed biotype used to study allelopathic effects. The results showed that weed extracts significantly decreased germination percentage, shoot and root length (cm), shoot and root weight (g), and seed vigor index (SVI 1 and SVI 2 ) of the tested species. In general, the variable effects are related to the weed species and extract concentrations.

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“…We just have to remember that plants have also been prolific producers of pharmacological and agrochemical important metabolites (Khalid et al, 2002;Cragg and Newman, 2013;Pino et al, 2013;Atanasov et al, 2015). For this reason, searching for biological properties in weeds can also allow us to detect potential beneficial applications for humans.…”

Section: Discussionmentioning

confidence: 99%

Diversity and Allelopathic Potential of Weeds among Panamanian Coffee Crops

Chérigo¹,

Lezcano²,

Martínez-Luis³

2017

OnLine Journal of Biological Sciences

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Worldwide, coffee is one of the most highly consumed and produced crops. Coffee production is a significant activity in the Panamanian economy, mainly in rural communities and among indigenous groups in the Chiriquí province highlands. Weeds growing alongside coffee plants can provoke considerable economic losses for producers by interfering with the growth, development and yield of coffee crop in cultivated areas. Designing an effective program to control weeds depends on identifying the different species found in the coffee plantations. The objective of this study was to assess the biological diversity and negative allelopathic potential of weeds in a coffee field to generate enough information that would better allow farmers to control them. As a result, we identified forty-two different species of weeds in all sampling transects within the study area. Emilia sonchifolia and Impatiens walleriana were the most abundant. In respect to phytotoxic activity, Emilia sonchifolia and Hyptis capitata showed the highest activity against the seed germination of dicotyledonous species Amaranthus hypochondriacus, exhibiting IC 50 values of 160 and 178 µg mL , respectively. Finally, we proceeded to evaluate the organic extracts of two coffee weeds in a panel of bioassays to demonstrate to the farmers that weeds may also have useful applications for human health. Borreria verticillata showed antimalaric activity while Blechum pyramidatum displayed inhibition of the α-glucosidase enzyme. These results allow us to propose a rational and systematic management of coffee weeds.

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Use of Allelopathy in Agriculture

Cited by 45 publications

References 40 publications

Phytotoxic effects of Cerbera manghas L. leaf extracts on seedling elongation of four monocot and four dicot test species

Phytotoxic effects of Cerbera manghas L. leaf extracts on seedling elongation of four monocot and four dicot test species

Allelopathic effects of water extracts of Sorghum halepense (L.) Pers., Convolvulus arvensis L. and Cirsium arvense Scop. on early seedling growth of some leguminous crops

Diversity and Allelopathic Potential of Weeds among Panamanian Coffee Crops

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