Data/hora: 02/06/2024 16:21:05

Provedor de dados: | 21
País: | Germany
Título: | Erarbeitung von Schwellenwerten zur gezielten Bekämpfung  von Zwergsteinbrand (Tilletia controversa) und Steinbrand  (Tilletia caries) sowie deren praktische Umsetzung im Öko-  Landbau
Autores: | Dressler, Markus; Sedlmeier, Berta; Voit, Benno; Büttner, Peter; Killermann, Berta.
Data: | 2009
Ano: | 2009
Palavras-chave: | Crop health; Quality; Protection Cereals; Pulses and oilseeds.
Resumo: | Dwarf bunt of wheat (Tilletia controversa) and common bunt of wheat (Tilletia caries)  are the most important pathogens in organic cereal production. The aim of this  research work is to find out whether a threshold value for seed is sufficient or whether  the infection potential in the soil must be considered additionally.  For dwarf bunt of wheat two-years-lasting field trials are performed at 3 sites with  susceptible and low-susceptible wheat and spelt cultivars, 4 infection levels and 4  replications. The field trials are designed in a randomized split-block design with  additional marginal-plots, so (1) sowing and harvest will be possible without greater  interaction between the field plots, (2) spore contamination of the soil during harvest  will be assured and (3) the determination of spore inoculum density in the soil after  harvest will be enabled. Only fields with natural spore contamination are chosen. The  field trials for common bunt of wheat are carried out in a similar design with 4  replicates at 4 sites with susceptible and low-susceptible wheat cultivars and two  different sowing times.  For an infestation with dwarf bunt of wheat, diffuse light is sufficient. The wheat  cultivar Capo showed a significantly lower infestation than the cultivar Saturnus. The  infestation of the spelt cultivar Franckenkorn was significantly lower than that of the  cultivar Oberkulmer Rotkorn, with the infestation of spelt cultivars being in principle  lower because of morphological features. The greatest significant number of infested  spikes per m² was found in the variant soil infection. With the dwarf bunt of wheat  results from the first year no threshold values can be determined neither for seed nor  for soil.  In the case of infestation with common bunt of wheat, there were no significant  differences between the early and late sowing dates, nor between the cultivars Capo  and Tommi. The highest bunt spore potential in the soil was found at the field trial site  in Saxony; however, the highest number of infested spikes per m² was not found  there.
Tipo: | Conference paper, poster, etc.
Idioma: | deu

Identificador:

http://orgprints.org/14193/1/Dressler_14193.pdf

Dressler, Markus; Sedlmeier, Berta; Voit, Benno; Büttner, Peter and Killermann, Berta (2009) Erarbeitung von Schwellenwerten zur gezielten Bekämpfung von Zwergsteinbrand (Tilletia controversa) und Steinbrand (Tilletia caries) sowie deren praktische Umsetzung im Öko- Landbau. [Elaboration of threshold values for efficient control of dwarf bunt (Tilletia controversa) and common bunt of wheat (Tilletia caries) and their transformation into practice in organic farming.] Poster at: 10. Wissenschaftstagung Ökologischer Landbau, Zürich, 11.-13. Februar 2009.

Relação: | http://orgprints.org/14193/
Formato: | application/pdf