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| Schärer, H.-J.; Ludwig, M.; Oberhaensli, T.; Tamm, L.. |
| The apple pathogen Marssonina coronaria (teleomorph: Diplocarpon mali) has recently become a significant problem in Central European organic apple production, causing dark spots on both the leaves and fruit, and early leaf fall. Field observations and resistance testing under controlled conditions indicate that there are differences in resistance to M.coronaria between cultivars. We screened 39 apple cultivars, selected from a large collection of genetic resources, for their susceptibility or resistance to M.coronaria. 1 year old saplings were artificially inoculated under semi-controlled conditions. The development of disease symptoms was observed and assessed several times over more than two months. Symptoms varied largely between cultivars, from... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Fruit and berries Crop health; Quality; Protection. |
| Ano: 2018 |
URL: http://orgprints.org/34870/1/Poster_Schaerer_etal-2018_Marssonina%20coronaria_Final_web.pdf |
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| Schärer, H.-J.; Ludwig, M.; Oberhänsli, T.; Bohr, A.; Buchleither, S.; Tamm, L.. |
| Marssonina leaf blotch is a fungal disease of apple caused by the ascomycete Diplocarpon mali (anamorph: Marssonina coronaria). The pathogen origins from Asia where it accounts for crop losses of up to 100%. In Europe it was first detected in Italy in 2001 and is spreading since then in Switzerland and southern Germany (first reports in 2010), mainly in organic apple orchards and in orchards for cider production with a reduced fungicide regime. M. coronaria infects the leaves by using appressoria and shortly afterwards forms haustoria in the host cells. Blackish-violet spots appear on the upper leaf side, sometimes turning into star-like lesions. On the lesions acervuli are produced and eventually the leaves become chlorotic and fall off. First symptoms... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Fruit and berries Crop health; Quality; Protection. |
| Ano: 2018 |
URL: http://orgprints.org/34873/1/Poster-Schaerer-etal-2018_Marssonina_Sonderformat_ICPP_Kongress_2018-Boston.pdf |
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| Thürig, B.; Schärer, H.-J.; Ludwig, M.; James, E. E.; Langat, M. K.; Mulholland, D. A.; Kleeberg, I.; Tamm, L.. |
| Extracts from European Larch (Larix decidua) were shown to be efficient to control grapevine downy mildew (Plasmopara viticola) under controlled and field conditions. Larixyl acetate and larixol were identified as the active compounds. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Viticulture. |
| Ano: 2018 |
URL: http://orgprints.org/34881/1/Poster_NBFF_Larixyne_Thuerig_2018_ohne_Schnittmarken.pdf |
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