Allelopathy relationship between plants and their use in organic farming

Phytochemicals released by plant species into the environment inhibit the emergence and growth of surrounding plants by changing their metabolic activity or impacting on their soil community mutualists referred as allelopathy. Allelochemicals are the compounds produced from the secondary metabolism of higher plants and microorganisms such as fungi, bacteria and viruses and affect on many processes in ecosystems and agro-ecosystems. In complex agro-ecosystem both crop and weed shows allelophathic effect. Allelochemicals from crop plant affect on other crop and weed while allelochemicals from weed effect on other weed and crop, beside this both weed and crop also shows autoallelopathy. Hence scientific and proper estimation of allelopathic plant, their allelochemical and susceptible weed species is necessary through advance research. This is helps to increase agricultural production, reduction in cost of pesticides, environment hazard, and way for the sustainable weed management and sustainable development of agricultural production as well as ecological systems.

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“…Agropyron repens influence on species Lycopersicon esculentum and Capsicum Annuum[57].Drost and Doll …”

mentioning

confidence: 99%

Allelopathy a Tool for Sustainable Weed Management

Shirgapure

Ghosh

2020

ACRI

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“…Some scientists have tested the efficacy of its aqueous extracts. Marian et al [120] tested the aqueous extracts of H. helix and observed strong inhibitions on the germination and seedling growth of Z. mays and P. vulgaris. Inhibitions in the germination of Fagus sylvatica L. seedlings by H. helix foliar extracts have also been described under water deficit, highlighting the importance of environmental interactions in the phytotoxic process [121].…”

Section: Hedera Helix Lmentioning

confidence: 99%

Biomass from Allelopathic Agroforestry and Invasive Plant Species as Soil Amendments for Weed Control—A Review

Valiño,

Pardo-Muras,

Puig

et al. 2023

Agronomy

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Effective weed management faces increasing legislative restrictions for the use of herbicides due to their toxicity and environmental persistence. In addition, the linear increase in resistant weeds threatens to render authorized herbicides useless. In a post-herbicide era, under the IWM strategy, allelopathy can play a relevant role since many plants can produce a variety of allelochemicals with different structures and modes of action, capable of inhibiting the germination and growth of different weed species. Inspired by green manuring with cover crops, the use of allelopathic biomass from weeds, invasive species, residues of forestry plantations, and other abundant wild plants has some advantages over green manures grown in situ or other alternatives such as applying plant extracts or essential oils. Beyond the ecosystem services provided by green manures, the potential use of allelopathic biomass offers extra opportunities for the science and practice of holistically integrated weed management because (i) the investment of resources and time for producing cover crops would be alleviated, and (ii), new use of agroforestry residues and a sink for harmful weed biomass is provided. In this review, we compile the current knowledge of those allelopathic species whose biomass, used as soil amendment, effectively controlled weeds. In addition, the complex allelopathic processes underlying the effectiveness of cover crops and allelopathic biomass used as green manures for weed control are revisited.

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