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| Registros recuperados: 356 | |
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| Kienzle, J.; Buchleither, S.; Scheer, C.; Zebitz, C.P.W.. |
| Several products were tested for their efficacy in control of the apple seed moth (Grapholita lobarzewskii Ragonot). None of them had a good efficacy. With several treatments with Bacillus thuringiensis an efficacy about 50 % could be achieved. An early treatment before egg-laying seem to improve the results. Quassia extract (9 g Quassin/ha/m tree height) gave efficacy about 50-60 % even if treated only once. NeemAzal gave only moderate efficacy (about 40-50 %). Mating disruption method was effective if the populations were not too high when the treatements were started. With high populations there was no sufficient control in the first year of application. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/9029/1/ecofruit_12th_43.pdf |
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| Leona, Brockamp; Eis, Birgit. |
| From June 2005 till June 2007 different soil preparation techniques like chiselling and advance sowing of medicinal plants and green manuring were proofed for their influence on reducing plant losses of strawberries caused by root diseases like Phytophthora species and Verticillium dahliae. The variants were combined with potted plants and Frigos. The experiment took place on an organic fruit farm near Stuttgart, Germany, with the strawberry variety ´Elsanta´. Focused on root diseases, habit and yield chiselling combined with Frigos and green manuring combined with potted plants showed the best results. Generally the marketable yield was often below yields from conventional cultivation. This project is granted by Bundesprogramm Ökologischer Landbau (BÖL,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13662/1/148%2D151.pdf |
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| Pfeiffer, Barbara. |
| At the LVWO Weinsberg in 1998 and 1999 different scab-protecting-strategies were tested at the variety Jonagold. Some examinations were done about fruit-setting depending on additives to sulphur like algae, vitamin E or Kaliumpermanganat. The conditions of the leaves (damage by scab, intensity of chlorophyll) had a great influence on the number of inflorescences in the following spring. Positive effects by Kaliumpermanganat and Vitamin E were found. In 1999 was the russetting of the fruits higher than in 1998, all combinations with cupper were more strongly russetted than the control, limesulphur was similiar to the control. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2000 |
URL: http://orgprints.org/14905/1/74_pfeiffer_b..pdf |
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| Ruess, Franz. |
| 12 year old apple-trees 01 the varieties "Elstar" and "Jonagold" were treated with different root pruning techniques. Furthermore, the different root pruning varieties were combined with dillerenl cutting-techniques 01 the crown and different thinning measures 01 the Iruiting wood. It could be shown, that root pruning results in a decrease 01 yield depending 01 the distance to the treetrunk. However, the decrease in yield is compensated by better quality 01 lruit concerning lruit-size, Iruit-colouring, sugar-content and ability 01 storage. As a consequence 01 root pruning alternate bearing 01 Irees is stopped. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14629/1/ruess_204.pdf |
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| Spitaler, Renate; Marschall, Klaus; Zidorn, Christian; Kelderer, Markus; Zelger, Roland; Stuppner, Hermann. |
| The growth inhibiting effect of four commercially available grapefruit seed extracts on the causal organism of apple scab Venturia inaequalis was tested. Germination of the conidia of Venturia inaequalis was pronouncedly inhibited by all tested extracts. The commercial products were analyzed by high pressure liquid chromatography and thin layer chromatography. All samples contained at least one preserving agent. These substances were identified as either benzethonium chloride, benzalkonium chloride, methyl parabene or propyl parabene. Freshly prepared extracts from seeds of grapefruits (Citrus paradisi) did not inhibit the germination of Venturia inaequalis. It was therefore concluded that the antifungal effect of grapefruit seed extracts is... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14543/1/39_Kelderer_208_211.pdf |
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| Eis, Birgit. |
| This trial took place in an organic fruit growing farm located near Lake Constance with the variety ‘Elstar’ planted in 1995. In 2004 and 2005 one variant (control) was pruned normally during the winter, the other variant was pruned more intensively to reduce the amount of flower buds. In 2004 at both variants the number of apples was reduced to 165 apples/tree at the end of May. Time for thinning by hand was cut down significantly in the intensively pruned variant. In addition at harvest the number of apples with bigger diameters, especially 75-80 mm, increased. Moreover the number of flower buds for the next season rose by 20 %. Therefore in 2005 the yield per tree at the intensively pruned variant increased about 15 %, but also the working hours... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13862/1/ecofruit_12th_34.pdf |
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| Kumpmann, S.; Kienzle, J.; Schulz, C.; Zebitz, C.P.w.; Trapp, A.; Kelderer, M.. |
| The application 01 NeemAzal-T/S, a product based on Neem extracts and plant oil, lor aphid contro I in apple orchards shows promising side effects on Adoxophyes orana. However, the efficacy 01 the recommended dosage 01 3 Vha at red bud stage is not enough lor a satisfying control 01 A. orana orchards with medium and high pest pressure. Field trials were carried out to introduce these side ellects in combination strategies with Bacillus thuringiensis or CA. PEX 2 (Granulovirus) lor ellicient control 01 this pesI. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14593/1/kumpmann_35.pdf |
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| Asser-Kaiser, Sabine; Fritsch, Eva; Undorf-Spahn, Karin; Kienzle, Jutta; Eberle, Karolin; Gund, Nadine; Reineke, Annette; Zebitz, Claus; Heckel, David; Jehle, Johannes. |
| Insect-specific baculoviruses are increasingly used as biocontrol agents of lepidopteran pests in agriculture and forestry, and thy have been previously regarded as robust to resistance development by the insects. However, in more than a dozen cases of field resistance of codling moth Cydia pomonella to commercially applied C. pomonella granulovirus (CpGV) in German orchards, resistance ratios exceed 1000. The rapid emergence of resistance is facilitated by sex-linkage and concentration dependant dominance of the major resistance gene and genetic uniformity of the virus. When the gene is fixed, resistance levels approach 100.000-fold. Our findings highlight the need for development of resistance management strategies for baculoviruses. (C)2007, American... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2007 |
URL: http://orgprints.org/15315/1/Asser%2DKaiser_et_al_2007.pdf |
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| Benduhn, Bastian; Maxin, Peter; Pfeiffer, Barbara. |
| From June 2004 onwards a trial was conducted on a blueberry farm in the Lüneburg Heath, Northern Germany, in which methods of mechanical soil cultivation were compared with mulching. The aim was to determine how far the mechanical methods and equipment established for soil management in viniculture and pomiculture can be adapted to blueberry cultivation, and can be improved. The results showed a clear advantage of the methods based on mulch technology in the shape of increased yields. Whilst the mechanical treatments provided acceptable weed control, they cannot be recommended for routine use at present because of strong yield reductions associated with damage to the shallow root system of highbush blueberry shrubs. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13663/1/152%2D154.pdf |
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| Pfeiffer, Barbara. |
| In the leaf-decompositon-trials to reduce the ascospore potential of Venturia inaequalis (2003/2004 and 2004/2005) different agents were tested with regard to direct effects on scab and to increasing the attractivity of the leaves for earthworms. TSB (lab medium with soya extracts) had a heavy direct effect on ascospore potential, but in this formulation it cannot be used in organic fruit-growing. Humofix and Bactofil B didn´t reduce the potential as strongly as in the trial 2002/2003. A yeast extract and a combination of bean extract with powdered milk increased the attractivity for earthworms. In the trial 2004/2005 the reduction of the ascospore potential was at best to 60 % of the control (powdered milk+Humofix), respecting the loss by earthworms... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/13802/1/ecofruit_12th_19.pdf |
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| Tamm, Lucius; Amsler, Thomas; Schärer, Hansjakob; Refardt, Matthias. |
| A novel formulation of potassium bicarbonate (Armicarb) was evaluated in 2004 and 2005 as agent against apple scab (3 field trials) and sooty blotch (2 field trials). Armicarb controlled scab equally well as the reference treatments sulphur and copper. Armicarb showed also excellent activity against sooty blotch. However, potential side-effects such as lenticell spot development need further investigation. At present, potassium bicarbonate is considered by the Swiss registration authorities as non-toxic to humans and in consequence, no residue levels have been specified. Armicarb has very interesting properties as a plant protection agent and its composition and risk profile are expected to fulfil the IFOAM standards for acceptance of novel plant... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8823/1/ecofruit_12th_16.pdf |
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| Kassemeyer, Hanns-Heinz; Buche, Claudia; Unger, Sabine; Kiefer, Beate; Loffel, Kirsten; Nick, Peter; Riemann, Michael; Guggenheim, Richard; Rumbolz, Joachim. |
| Plasmopara viticola, the causai agent of grapevine downy mildew is very well adapted to its host pianI. Therefore it is very difficult to develop methods for the biological control which meet the requests of ecological viticulture. One of the possibilities for a biological control of grapevine downy mildew is the usage of the natural resistance potential of the European cultivars of Vitis vinifera, more exactly the induced resistance. Another way is the use of specific inhibitors which either stop the infection process or have an effect on the interaction of the pathogen with the host pianI. Whereas generai information about the resistance reactions in plants is available and the first results were also won for vine, the knowledge about inhibitors is very... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2002 |
URL: http://orgprints.org/14613/1/kiefer_127.pdf |
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| GARCIN, A.. |
| The peach aphid Myzus persicae Sulzer is one of the major pests found on peach trees. The CTIFL has been running tests since 2005 to assess the efficacy of Surround® WP, a product containing kaolin that is applied either at the time of leaf fall to prevent winter egg-laying or in the spring to prevent the establishment of fundatrices. The period of application and the production system (organic or conventional) were tested, allowing a comparison with chemical aphicides. The clay product used at leaf fall reduced winter egg-laying by about 50%. Autumn application of Surround® alone was not sufficient to control aphid colonies in the spring, but it could be used as part of a supervised control strategy, combined with the application of mineral oils in late... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2009 |
URL: http://orgprints.org/15470/1/17%2DGarcin.pdf |
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| Geipel, Karlheinz; Kreckl, Wolfgang. |
| Plant protection is still a burning issue in organic apple production. Insufficient strategies lead to minor quali-ties and immense profit cuts. To thwart these problems and to support organic apple production a program has been started to test a new cultivation system for apple farming. Preconditions for the profitability of the new method are a high yield of premium quality apples comparable to those reached in conventional farming. Main components of the new cultivation system are a foil canopy to prevent fungal infections and lateral net-tings for protection against animal pests and to allow the application of beneficial organisms. To meet the top claims of organic production no chemical plant protection is performed and EU regulations are regarded.... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8842/1/ecofruit_12th_24.pdf |
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| Triloff, Peter. |
| Der Infektionsdruck (PAD: Potentielle Ascosporen Dosis) beschreibt die Anzahl Ascosporen, die für die Primärsaison pro m² Anlagenboden erwartet werden kann. Sie wird durch den Befall zum Zeitpunkt des Blattfalles bestimmt und kann in behandelten Praxisanlagen zwischen einigen Hundert und über 100 Millionen erreichen, also um einen Faktor von mehr als 1 Million schwanken. Von diesem Gesamtbefall zum Blattfall entstehen in Anlagen mit einem höherem Primärbefall mindestens 80% ab etwa Mitte bis Ende August auf den oberen Blättern der Langtriebe. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2004 |
URL: http://orgprints.org/14081/1/17_Triloff_87_90.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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| Trapman, Marc. |
| From 2002 to 2005 field observations where made on the occurrence of Sooty Blotch (SB) in unsprayed orchards on the apple variety Topaz. First SB symptoms in high inoculum orchards where found after on average 639 leaf wetness hours following the first rain 10 days after petal fall. Even then symptoms where present only on places on the fruits that probably stayed wet longer than the leaf wetness sensors have indicated. Weather stations that are set up to register average orchard conditions are unlikely to detect the wetness conditions that lead to SB infections in critical parts of the orchard. From the delayed symptom development compared to the published data form USA we concluded that un-der Dutch conditions the lower temperature retards the symptom... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2006 |
URL: http://orgprints.org/8841/1/ecofruit_12th_22.pdf |
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| Walther, B.; Fülling, O.; Malevez, J.; Pelz, H.-J.. |
| Vole species, especially Arvicola terrestris and Microtus arvalis cause significant economical damage in organic pomiculture by gnawing the root system of trees. The importance of voles as pest organisms is well known. Nevertheless, the estimation of financial loss caused by voles is difficult for German fruit growers. We conducted a survey among organic fruit growers to get data on kind and amount of annual damage. Using the available publications and official statistics we calculated economical values of organic apple trees for different types of orchard processing and tree ages. Furthermore we calculated the number of trees lost due to voles in one year. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection Fruit and berries. |
| Ano: 2008 |
URL: http://orgprints.org/13744/1/330%2D334.pdf |
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| Registros recuperados: 356 | |
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