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• Possibilities of Weed Beet (Beta vulgaris, L. ssp. marritima) Regulation

  133-136

  Roman Hnilicka

  Josef Pulkrabek

  Katerina Pazderu

  Views:

  87

  Weed infestation regulation in sugar beet belongs to the most difficult growing measures, the aim of our work was to find out, if active substances contained in preparations Roundup and Fazor influence number, weight and germination of clusters in plants of weed beets. Statistically significant differences in germinability were found among control and all variants in which preparation Fazor was applied. The Roundup treatment did not have significant influence on germination. Presented results are only preliminary and one-year results, more experiments are necessary to determine the effects of the studied applications.

• The effect of copper fungicides on the rate of photosynthesis and the transpiration of hop plants

  117-123

  Jaroslav Pokorny

  Josef Pulkrábek

  Karel Krofta

  Josef Ježek

  Views:

  83

  The paper evaluates the effect of copper fungicide spraying on the rate of photosynthesis and transpiration of hops, the influence of spraying on the elemental copper content in the leaves and cones hop variety Agnus. Photosynthetic rate was measured by LC pro+ (infrared analyzer) in the Hop Research Institute Saaz in the field in some periods of 2008, 2009 and 2010. Dry cones and leaf samples (taken before and after application of copper fungicides) were analyzed in an accredited laboratory for elemental copper.