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Analysis of selection pressure exerted on Plasmopara viticola by organically based fungicides Organic Eprints
Matasci, C.L.; Gobbin, D.; Stutz, Ch.; Gessler, C..
Downy mildew is one of the most important grape diseases world-wide. The pathogen is a genetically highly diversified organism with a high capacity of adaptation. A monitoring of changes in population structure of P. viticola subjected to new copper replacing products or strategies, studied and developed within REPCO (Replacement of Copper Fungicides in Organic Production of Grapevine and Apple in Europe) is important for assessing selection pressure which could lead to a reduction of efficacy of these new measures. Therefore P. viticola lesions collected on untreated and treated vines were analyzed by means of microsatellite markers. No significant differences in the populations structure were determined among untreated and treated populations, indicating...
Tipo: Conference paper, poster, etc.
Ano: 2006 URL: http://orgprints.org/8212/1/Matasci.pdf
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Effects of a biocontrol agent of apple powdery mildew (Podosphaera leucotricha) on the host plant and on non-target organisms: an insect pest (Cydia pomonella) and a pathogen (Venturia inaequalis) Inra
Alaphilippe, A.; Elad, Y.; Rav David, D.; Derridj, S.; Gessler, C..
A number of studies have focused on the selection and use of new biocontrol agents, but the effects of the introduction of these microorganisms on non-target organisms, including the crop plants themselves, are not well known. Non-target effects of sprayed applications of a potential biocontrol agent of apple powdery mildew (Podosphaera leucotricha Ell. Et Ev.), on scab infections (Venturia inaequalis Cooke Winter), on codling moth [Cydia pomonella L. (Lepidoptera: Tortricidae)] oviposition and damage and apple (Malus x domestica) fruit quality are examined. This biocontrol agent, an epiphytic yeast isolate called Y16, affected neither conidia germination of V. inaequalis nor their penetration of the leaf tissue but suppressed the disease caused by this...
Tipo: Journal Article Palavras-chave: AGENT PATHOGENE; PLANTE HOTE; MALUS; CHAMPIGNON; INSECTE NUISIBLE; MILDIOU; GERMINATION; CHAMPIGNON; ERYSIPHALES; ASCOMYCOTINA; DOTHIDEALES; LEPIDOPTERA; INSECTE CONIDIA GERMINATION; APPLE SCAB; CODLING MOTH; OVIPOSITION; FRUIT QUALITY.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010c26ddd99&uri=/notices/prodinra1/2010/09/
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