Control of Allium white rot (Sclerotium cepivorum) with composted onion waste

Coventry, E.; Noble, R.; Mead, Andrew; Whipps, J. M.

doi:10.1016/s0038-0717(02)00037-8

Cited by 47 publications

(46 citation statements)

References 31 publications

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“…Properly composted, onion wastes contained some sulphoxides (di-n-propyl disulphide) which trigger the dormant sclerotia to germinate in absence of the root. These germinated sclerotia are unable to survive without the living host, which contributes to the decrease in the primary inoculum faced by the next onion crop (Coventry et al 2002).…”

Section: Organic Amendmentsmentioning

confidence: 99%

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

et al. 2008

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The rhizosphere is a hot spot of microbial interactions as exudates released by plant roots are a main food source for microorganisms and a driving force of their population density and activities. The rhizosphere harbors many organisms that have a neutral effect on the plant, but also attracts organisms that exert deleterious or beneficial effects on the plant. Microorganisms that adversely affect plant growth and health are the pathogenic fungi, oomycetes, bacteria and nematodes. Most of the soilborne pathogens are adapted to grow and survive in the bulk soil, but the rhizosphere is the playground and infection court where the pathogen establishes a parasitic relationship with the plant. The rhizosphere is also a battlefield where the complex rhizosphere community, both microflora and microfauna, interact with pathogens and influence the outcome of pathogen infection. A wide range of microorganisms are beneficial to the plant and include nitrogen-fixing bacteria, endo-and ectomycorrhizal fungi, and plant growth-promoting bacteria and fungi. This review focuses on the population dynamics and activity of soilborne pathogens and beneficial microorganisms. Specific attention is given to mechanisms involved in the tripartite interactions between beneficial microorganisms, pathogens and the plant. We also discuss how agricultural practices affect pathogen and antagonist populations and how these practices can be adopted to promote plant growth and health.

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Section: Organic Amendmentsmentioning

confidence: 99%

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

et al. 2008

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“…In addition, waste peelings and leaf wastes from imported and homegrown vegetables accumulate at packhouses (Noble et al, 2000). Composting under specified conditions of time and temperature ensures most pathogens, including S. cepivorum, and pests present in the waste are destroyed and will not subsequently infect the land to which it is applied (Bollen et al, 1989;Coventry et al, 2002). Composted onion waste has previously been shown to reduce viability of sclerotia of S. cepivorum in sandy loam soil in glasshouse pot tests (Coventry et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Suppression of Allium white rot (Sclerotium cepivorum) in different soils using vegetable wastes

et al. 2005

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Mixtures of wet vegetable wastes (Brassica, carrot or onion) and dry onion waste were composted at 50°C for 7 days. The incorporation of the raw or composted vegetable waste mixtures into sandy loam, silt and peat soils reduced the viability of sclerotia of S. cepivorum in glasshouse pot bioassays. The reduction in viability was dependent on waste type, rate of incorporation, duration of exposure and soil type. Onion waste was the most effective waste type in reducing sclerotia viability in all three soils. The Brassica and carrot wastes were as effective as the onion waste in silt soil but less effective in sandy loam and peat soil. A 50% w/w incorporation rate of the wastes gave the largest reduction in viability, with an increase in reduction over time. Composted onion waste reduced sclerotia viability under glasshouse and field conditions although the effect was smaller in the field. Composted onion waste incorporated into soil at 50% w/ w reduced the incidence of Allium white rot on onion seedlings in glasshouse pot tests. Incidence and control of the disease differed with soil type. The most consistent control was achieved in peat soil whereas no control was observed in silt soil. Incorporation of the waste 2 months prior to sowing or transplanting reduced seedling emergence in sandy loam soil and growth in all three soil types. The potential for field application of composted vegetable wastes as a sustainable method for control of Allium white rot and waste disposal is discussed.Abbreviations: AWR -Allium white rot; GLM -generalised linear model.

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“…They include onion skins, the outer two leshy scales, and roots generated during industrial peeling but also undersized, malformed, or damaged onion bulbs. They are not suitable as fodder because of their strong characteristic aroma and neither as an organic fertilizer due to the rapid development of phytopathogenic agents such as Sclerotium cepivorum [119]. Their disposal commonly involves landill with high economical costs and important environmental impact [120].…”

Section: Valorization Of Onion By-productsmentioning

confidence: 99%

Onions: A Source of Flavonoids

Rodrigues¹,

Almeida²,

Simal‐Gándara³

et al. 2017

Flavonoids - From Biosynthesis to Human Health

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Flavonoids are a large and diverse group of polyphenolic compounds with antioxidant efects, and onion (Allium cepa L.) is one of the richest sources of dietary lavonoids. Flavonoid content is afected by endogenous factors-genotype and agro-environmental conditions. Considerable research has been directed toward understanding the nature of polyphenols in diferent products and the factors inluencing their accumulation. This review examines the impacts of pre-and postharvest factors on onions' lavonoid content, highlighting how this knowledge may be used to modulate their composition and the potential use of onion by-products.

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Control of Allium white rot (Sclerotium cepivorum) with composted onion waste

Cited by 47 publications

References 31 publications

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

The rhizosphere: a playground and battlefield for soilborne pathogens and beneficial microorganisms

Suppression of Allium white rot (Sclerotium cepivorum) in different soils using vegetable wastes

Onions: A Source of Flavonoids

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