Compost and compost tea: Principles and prospects as substrates and soil-borne disease management strategies in soil-less vegetable production

Numerous studies have demonstrated the potential of composted organic wastes not only as substitutes for peat as a growth substrate but also to stimulate plant growth and suppress soil-borne diseases. The major impediment to the use of compost as substrates or biocontrol agents has been variation in...

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Veröffentlicht in:Biological agriculture & horticulture 2012-03, Vol.28 (1), p.1-33
Hauptverfasser: St. Martin, C. C.G, Brathwaite, R. A.I
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creator St. Martin, C. C.G
Brathwaite, R. A.I
description Numerous studies have demonstrated the potential of composted organic wastes not only as substitutes for peat as a growth substrate but also to stimulate plant growth and suppress soil-borne diseases. The major impediment to the use of compost as substrates or biocontrol agents has been variation in physical and chemical characteristics and disease suppression levels across and within compost types, sources, and batches. Compost tea, a product of compost, has also been shown to suppress soil-borne diseases including damping-off and root rots (Pythium ultimum , Rhizoctonia solani , Phytophthora spp.) and wilts (Fusarium oxysporum and Verticillium dahliae). Although the mechanisms involved in disease suppression are not fully understood, sterilization of composts and compost teas has generally resulted in a loss in disease suppressiveness. This indicates that the mechanism of suppression is often, or predominantly, biological, although chemical and physical factors have also been implicated. The inoculation of composts with biological control agents, manipulation of compost tea production process, and the use of new techniques for organic matter characterization and microbial community profiling may improve the efficacy and reliability of disease control obtained.
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source Taylor & Francis:Master (3349 titles)
subjects biological control agents
compost
compost extracts
compost tea
damping off
disease control
disease suppression
Fusarium oxysporum
growing substrate
methodology
microbial communities
organic matter
organic wastes
peat
Phytophthora
plant growth
Pythium ultimum
root rot
soil-borne disease
soil-borne diseases
Thanatephorus cucumeris
vegetable growing
Verticillium dahliae
title Compost and compost tea: Principles and prospects as substrates and soil-borne disease management strategies in soil-less vegetable production
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