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| Registros recuperados: 53 | |
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| Manici, L.; Kelderer, Markus; Franke-Whittle , I-H; Rühmer , T.; Baab , G.; Nicoletti , F.; Caputo, F.; Topp, A.; Insam , H.; Naef, A.. |
| Apple replant disorders are one of the causes of the downward trend of land planted with apple orchards in Central Europe. A specific transnational survey was thus conducted on apple root associated microorganisms, aimed at increasing the knowledge regarding crop management to counteract this tendency. Soil health was evaluated using a bioassay test with root cuttings of the clonal M9 rootstock, one of the most commonly used rootstocks in Europe. Plant growth response in replant, fallow and gamma ray-sterilized soil was evaluated using soil samples taken from nine orchards selected (three per country) from specialized apple growing areas of Germany, Austria and Italy. Plant growth significantly differed between treatments but not between countries. Root... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Soil biology Fruit and berries Crop health; Quality; Protection. |
| Ano: 2013 |
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| Kelderer, Markus; Lardschneider, Ewald; Marschall, Klaus. |
| Scab is still a big challenge for those apple orchards which are managed organically. Inoculum survives during winter in leaf litter, and sporulates in spring when vegetation starts. Different surveys in other regions showed that it is possible to reduce the presence of scab in apple orchards by removing the leave litter from the orchards. Different trials were carried out to understand if sanitation measures would also be of practical interest in organic orchards in South Tyrol. The results varied. In some trials, scab was reduced on the leaves up to 60%, in others no differences were observed. It is therefore not clear if the results justify the expense of cost and time for such measures. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14082/1/17_Triloff_87_90.pdf |
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| Kelderer, Markus; Lardschneider, Ewald; Casera, Claudio. |
| Thinning trials with lime sulphur were carried out for 5 years on different sites in South Tyrol. The sprays were applied during blossom to various varieties. During these trials different amounts of active ingredients, water volumes and numbers of treatments were used. Beside the thinning effect the influence on yield (kg/tree) and Fruit quality (average size of the Fruits, fruit-russetting, fruit-deformations) and the return bloom of the treated trees were evaluated. In several cases the use of lime sulphur gave satisfactory results (thinning effect >20%). The results showed a correlation with the amount of active ingredient, water volume, and number of treatments. In most of cases it was possible to increase the average Fruit size. The influence on... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14610/1/kelderer_112.pdf |
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| Kelderer, Markus; Sgarbossa, Manuela; Schönweger, Gudrun; Elias, Ellen; Roland, Zelger; Santer, Johann; Stuppner, Hermann. |
| Ryania speciosa is a grove belonging to the family Flacourtiacea, located in tropical climates in Central- and South- America. The Indigenous population used the plant, which contains toxic alkaloids, against cockroaches. In the forties the ground wood was used as insecticide against different pests. In the first version of annex 2b from the EC regulation 2092/91, Ryania was still listed, but it was subsequently cancelled due to its lack of registration as a pesticide in any European country. In organic farming, only a few insecticides are allowed, but in orchards there is a permanent need to control larvae such as coddling moth, etc. The Italian Ministry of Agriculture initiated a survey to investigate the possibility of developing an 'organic'... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14024/1/5_Kelderer_25_28.pdf |
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| Kelderer, Markus; Lardschneider, Ewald; Casera, Claudio. |
| A large number of organic fruit-growers in South Tyrol regulate scab with scab-stop treatments using the overhead irrigation system. They use mainly lime sulphur, because it is particularly suitable for scab stop treatments. Treatments during blossom can also thin the flowers. The aim of the field-trials was to understand if lime sulphur applied with the overhead irrigation system gives the same thinning effect like the normal application with the sprayer. The results from the 2 years of trials show that there is no significant difference between the two application systems. Other factors like the influence of the different climatic parameters in each year play a more important role. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13870/1/ecofruit_12th_41.pdf |
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| Kelderer, Markus; Lardschneider, Ewald; Casera, Claudio. |
| Conventional and integrated fruit growers, but not organic producers, have the possibility to use thinning agents (e.g. benzyl adenine), which allow crop regulation at a relatively late stage (10-16 mm fruit size). A few surveys have shown that by reducing net photosynthesis after blossom, June fruit drop increases. This could be an interesting new approach for organic apple orchards. Since 2003, different trials have been carried out at the Laimburg Research Station on the variety Golden Delicious rootstock M9 to devise a method for practical use by fruit growers. Unfortunately, there are still several constraints to the practical application of the shading method, not least because it does not sufficiently reduce alternate fruit bearing in the... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13737/1/310%2D313.pdf |
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| Kelderer, Markus; Lösch, Robert; Lardschneider, Ewald; Casera, Claudio. |
| In the organic apple orchards in South Tyrol different voles (Fam. Arvicolidae) are the cause of big damages on the trees. At present there isn't any product listed t the annex 2b of the EC- decree 2092/91 for organic agriculture, which could control the voles efficiently. Therefore it is quite difficult to control the voles in organic orchards. It is necessary to convince European and national authorities, associations and organs of control to allow the use of suitable products. Our trials showed that Silmurin, an extract of the red sea-onion (Uriginea marsitima) controls quite efficiently the field mouse (Microtus arvalis), but hasn't any effect against the earth vole (Arvicola terrestris). Against these voles we obtained good results with... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2000 |
URL: http://orgprints.org/14904/1/67_kelderer_m..pdf |
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| Kelderer, Markus; Casera, Claudio; Lardschneider, Ewald. |
| Mainly in Anglo-Saxon countries (USA, New Zealand etc.) the market for organic agriculture inputs offers different natural substances for the use as bio-herbicides. The most important ingredients of these products are acetic acid, citric acid and clove-extracts (eugenol) in the case of post-emergence herbicides and corn-gluten in pre-emergence products. In a first screening test we compared the efficacy of these ingredients with some other natural substances. The most interesting ones were later compared in a field trial where the efficacy and the required dosages to clean a strip of about 40 cm under the trees were assessed in an ap-ple orchard. A few products showed interesting results (vinegar, pine oil), but the required dosage to keep the strip under... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Weed management; Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/9017/1/ecofruit_12th_32.pdf |
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| Kelderer, Markus; Lardschneider, Ewald; Casera, Claudio. |
| In organic apple growing the woolly apple aphid (Eriosoma lanigerum) is still an unsolved problem. Various approaches to use beneficial insects were not really effective. Only winter treatments with mineral oils showed partial and fluctuating success. In 2006 and 2007 field trials were carried out to evaluate the efficacy of winter treatments to control woolly apple aphids. The efficacy of several products (different mineral oils, lime sulphur, and lime sulphur + mineral oil) was tested in comparison to an untreated control, and possible side effects on the population of predatory mites were investigated. The study furthermore aimed at establishing the best timing of the application against the target pest. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13676/1/196%2D202.pdf |
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| Registros recuperados: 53 | |
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