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Evaluation of non-chemical seed treatment methods for the control of Alternaria dauci and A. radicina on carrot seeds
JKI, Inst Biol Control, Darmstadt, Germany .
JKI, Inst Biol Control, Darmstadt, Germany .
JKI, Inst Biol Control, Darmstadt, Germany .
JKI, Inst Strategies & Technol Assessment Plant Protec, Germany .
Vise andre og tillknytning
2010 (engelsk)Inngår i: European journal of plant pathology, ISSN 0929-1873, E-ISSN 1573-8469, Vol. 127, nr 1, s. 99-112Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The current study was initiated to evaluate the efficacy of physical methods (hot water, aerated steam, electron treatment) and agents of natural origin (resistance inducers, plant derived products, micro-organisms) as seed treatments of carrots for control of Alternaria dauci and A. radicina. Control of both Alternaria species by seed treatment with the resistance inducers was generally poor. Results were also not satisfactory with most of the formulated commercial micro-organism preparations. Based on the average of five field trials, one of these, BA 2552 (Pseudomonas chlororaphis), provided a low but significant increase in plant stand. Among the experimental micro-organisms, the best results were obtained with Pseudomonas sp. strain MF 416 and Clonostachys rosea strain IK726. A similar level of efficacy was provided by seed treatment with an emulsion (1%) of thyme oil in water. Good and consistent control was generally achieved with the physical methods aerated steam, hot water and electron treatment. Aerated steam treatment was, apart from the thiram-containing chemical standard, the best single treatment, and its performance may at least partially be due to extensive pre-testing, resulting in dosages optimally adapted to the respective seed lot. In some of the experiments the effect of the hot water treatment, which was tested at a fixed, not specifically adapted dosage, was significantly improved when combined with a Pseudomonas sp. MF 416 or C. rosea IK726 treatment. The results are discussed in relation to the outcome of experiments in which the same seed treatment methods and agents were tested in other seed-borne vegetable pathosystems.

sted, utgiver, år, opplag, sider
2010. Vol. 127, nr 1, s. 99-112
Emneord [en]
Organic farming, Biocontrol agents, Physical seed treatment methods, Resistance inducers, Essential oils
Identifikatorer
URN: urn:nbn:se:hig:diva-14078DOI: 10.1007/s10658-009-9575-3ISI: 000276070500011OAI: oai:DiVA.org:hig-14078DiVA, id: diva2:615319
Tilgjengelig fra: 2013-04-09 Laget: 2013-04-09 Sist oppdatert: 2018-03-13bibliografisk kontrollert

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