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| Dorn, Brigitte; Musa, Tomke; Krebs, Heinz; Fried, Padruot; Forrer, Hans-Rudolf. |
| In laboratory, growth chamber, micro-plot and small-plot field trials, 53 copper-free preparations (CFPs) were examined for their potential to control potato late blight (PLB) caused by Phytophthora infestans (PI). In-vitro, 43% of the CFP inhibited the germination of sporangia or the mycelial growth of the pathogen completely. In growth chamber trials, 21% of them reduced PI foliar blight of tomato seedlings by at least 80%. In contrast, in small-plot field trials with potatoes under practice like applications, none of the CFPs sufficiently controlled the disease. Even in micro-plot field trials with applications twice a week the efficacies did not exceed 60%. With in-vitro tests we showed that the reason for the insufficient performance of the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2009 |
URL: http://orgprints.org/14095/1/Dorn_14095.pdf |
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| Finckh, Maria R.; Schlute-Geldermann, Elmar; Musa, Tomke; Forrer, Hans-Ruedi; Bruns, Christian. |
| Late blight, caused by Phytophthora infestans is commonly thought to be the factor most limiting yield in organic potato production. However, because there is no fully effective fungicide available to control late blight, there are virtually no yield loss data available for organic farming conditions. In large-scale experiments covering 2-6 ha from 2000-2002, late blight assessments were conducted throughout the season in small sections throughout the field. The same sections were harvested, resulting in between 400 and 700 data points per experiment and year. In a second set of experiments, from 2002-2004, the interactive effects of N-availability in the soil, climatic conditions and late blight were studied in the presence and absence of copper... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/9601/1/9601_Finckh_Poster.pdf |
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| Forrer, Hans-Rudolf; Musa, Tomke; Krebs, Heinz; Dorn, Brigitte. |
| Phytophthora infestans, the cause of late blight, is the most devastating pathogen in potatoes world-wide. To replace copper fungicides in organic potato production, we examined preparations based on plant extracts, micro-organisms, and other natural compounds for their effect on late blight in field trials as well as in vitro and in vivo. Most of this work we realised as participants of the EU project Blight-MOP. The majority of the preparations effectively inhibited P. infestans in vitro or in vivo on tomato plants. However, under field conditions and with applications once a week, commercial and experimental copper-free preparations failed to sufficiently control late blight. In contrast, copper fungicides applied according to the decision support... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2006 |
URL: http://orgprints.org/7513/1/_org_joint_congress_010306.pdf |
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| Forrer, Hans-Rudolf; Musa, Tomke. |
| FusaProg and FusaProg Light are prognosis models in conventional wheat production to assess the risk of infection by fusarium and mycotoxins in Switzerland. FusaProg Light is freely accessible and offers the farmer a quick risk assessment for day to day weather conditions. FusaProg is an extended version, only for registered users, with a tailor-made risk assessment and detailed prognosis evaluation for local conditions. FusaProg offers downloadable data and maps on the infection risk and mycotoxin (DON) forecast for registered wheat crops in Switzerland related to weather conditions. The optimization of the wheat cultivation systems and extension by the model helps to avoid the overuse of toxins in conventional farming. Organic farmers may use the... |
| Tipo: Practice tool |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2013 |
URL: http://orgprints.org/30570/1/30570.png |
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