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Control of seed-borne pathogens on legumes by microbial and other alternative seed treatments
Univ Torino, Ctr Competence Innovat, Grugliasco, Italy .
Univ Torino, Ctr Competence Innovat, Grugliasco, Italy .
Gothenburg Univ, Dept Cellular & Mol Biol, Gothenburg, Sweden.
Gothenburg Univ, Dept Cellular & Mol Biol, Gothenburg, Sweden, and Univ Molise, Dipartimento Sci Anim Vegetali & Ambiente, Campobasso, Italy .
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2009 (English)In: European journal of plant pathology, ISSN 0929-1873, E-ISSN 1573-8469, Vol. 123, no 2, 139-151 p.Article in journal (Refereed) Published
Abstract [en]

Greenhouse trials were carried out in order to test the efficacy of different seed treatments as alternatives to chemicals against Colletotrichum lindemuthianum cause of anthracnose on bean and Ascochyta spp. cause of Ascochyta blights on pea, respectively. Resistance inducers, commercially formulated microorganisms, non-formulated selected strains of different microorganisms (fungi, bacteria and yeasts) and plant extracts were applied as dry or liquid seed treatments on naturally infested seeds. Seedling emergence and disease incidence and/or severity were recorded. Almost all seed treatments turned out to be ineffective in controlling the Ascochyta infections, which is in line with the literature stating that these pathogens are difficult to control. The only alternative treatments that gave some control of Ascochyta spp. were thyme oil and a strain of Clonostachys rosea. The resistance inducers tested successfully controlled infections of bean by C. lindemuthianum. Among the formulated microorganisms, Bacillus subtilis-based formulations provided the best protection from anthracnose. Some strains of Pseudomonas putida, a disease-suppressive, saprophytic strain of Fusarium oxysporum and the mustard powder-based product Tillecur also proved to be effective against bean anthracnose. However, among the resistance inducers as well as among the other groups, certain agents caused a significant reduction of plant emergence. Different alternative seed treatments can therefore be used for the control of C. lindemuthianum on bean, while on pea only thyme oil and a strain of Clonostachys rosea showed some effectiveness against Ascochyta spp.

Place, publisher, year, edition, pages
2009. Vol. 123, no 2, 139-151 p.
Keyword [en]
Biocontrol agents, Plant extracts, Colletotrichum lindemuthianum, Ascochyta spp., Integrated pest management, Organic farming
Identifiers
URN: urn:nbn:se:hig:diva-14080DOI: 10.1007/s10658-008-9349-3ISI: 000262087500002OAI: oai:DiVA.org:hig-14080DiVA: diva2:615317
Available from: 2013-04-09 Created: 2013-04-09 Last updated: 2017-12-06Bibliographically approved

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