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| Kühne, Stefan; Reelfs, Torben; Ellmer, Frank; Moll, Eckard; Kleinhenz, Benno; Gemmer, Christine. |
| The Colorado potato beetle (Leptinotasara decemlineata Say) is one of the most important pests on potatoes (Solanum tuberosum). In the present study, we compared the efficacy of three biological insecticides – Neem (NeemAzal-T/S), pyrethrum/rapeseed oil (Spruzit Neu) and Bacillus thuringiensis var. tenebrionis (Novodor FC) – against this pest in field trials conducted from 2005 to 2007. The combined and temporarily shifted application of neem and B.t.t. reduced significantly the number of beetle larvae and the percentage of defoliation due to larval feeding, and increased the potato yield considerably. The SIMLEP3 forecasting model is useful for determining the optimal timing of the treatment. Pyrethrum/rapeseed oil did not lead to a significant reduction... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2008 |
URL: http://orgprints.org/11806/1/kuehne_11806_ed.doc |
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| König, Ingo; Steinborn, Patricia; Deubele, Theresa; Raupach, Valeria; Reelfs, Torben; Zieger, Martin. |
| In a holistic approach customers were asked in qualitative interviews about their perception of organic farms which run their own shops. Besides the organic quality they like the competent service, the traditional look and details. They regard the farms shops as pleasant. Many customers visit the farm and animals. Other consumers living near the farm like a wide range of products contact to their neighbourhood and exchange information. The seasonal fluctuations in supply are accepted. Most customers, though different in age and motivation, are aware of ecological and health topics. Customers praise the good taste, the real freshness and good quality. In a second series of Interviews customers of organic shops were asked to define the farm shop related... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Markets and trade; Farm economics. |
| Ano: 2005 |
URL: http://orgprints.org/3782/1/3782.pdf |
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| Kühne, Stefan; Reelfs, Torben; Moll, Eckard; Kleinhenz, Benno. |
| The Colorado Potato Beetle is one of the most important pests of potatoes. The effect of various plant protection products based on neem (NeemAzal-T/S), pyrethrum/rape oil (Spruzit Neu) and Bacillus thuringiensis - B.t.t. (Novodor FC) against this pest has been compared in a field experiment from 2004 until 2006. The combined application of neem and B.t.t.-product have reduced the number of Colorado Potato Beetle larvae as well as the losses of plant material by feed of the beetle larvae significantly. In three years of field experiments the application of pyrethrum/rape oil has shown no significant effect to reduce the number of Colorado Potato Beetles. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2007 |
URL: http://orgprints.org/9458/1/9458_K%C3%BChne_Vortrag.pdf |
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