Comparison of six inoculation techniques withColletotrichum acutatum on cold stored strawberry plants and screening for resistance to this fungus in French strawberry collections |
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Authors: | Béatrice Denoyes-Rothan G Guérin |
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Institution: | (1) Unité de Recherches sur les Espèces Fruitières et la Vigne, INRA, BP 81, 33883 Villenave d'Ornon Cedex, France |
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Abstract: | Six inoculation techniques were compared for their ability to evaluate resistance toColletotrichum acutatum of five strawberry cultivars. Inoculation by dipping the whole cold stored plants in a suspension of conidia adjusted to 2.106 conidia ml–1 made it possible to screen cultivars resistant to crown rot at 28 days after inoculation. Using the dipping technique, 44 strawberry cultivars were evaluated for their resistance to one strain ofC. acutatum, 1267b. Twelve of them did not show wilt symptoms and could be classified as resistant. When another strain ofC. acutatum, 494a, was inoculated to seven cultivars, all of them including Dover, resistant to 1267b, showed wilt symptoms. This result showed the importance of investigations on genotype × isolate interactions to conduct an efficient breeding programme for screening resistance toC. acutatum. |
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Keywords: | screening susceptibility Fragaria × ananassa anthracnose Colletotrichum spp |
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