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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
The comparison of selected types of potatoes in terms of occurrence of potato scab and yield
 MÁCHOVÁ, Petra
The principal aim of this work was to compare chosen types of potatoes in terms of occurrence of potato scab and yield. Common scab is a wide - spread potato disease presently. Scabby marks represent the significant defect of consumption potatoes as well as seed potatoes, because they depreciate appearance and quality of potatoes. However, they don{\crq}t affect lower yields directly. The experiment was realized in a private garden. Five different types of potatoes were planted out and the experiment was repeated after two consecutive years. The experiment was evaluated partially at harvest in both years, than followed a particular statistical evaluation. On account of gained results it has been found out that the choice of potato type affects yield as well as the occurrence of potato scab.
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The effects of cultivation conditions on polyphenol compounds levels in potato tubers periderm in varieties differing in their susceptibility to common scab
 Krištůfek, Václav ; Diviš, J. ; Dostálková, I.
Field and glasshouse trials were performed in 2000 and 2001 to estimate total polyphenol contents in 15 potato cultivars from two sites that differed in the level of scab incidence. Polyphenol content was determined spectrophotometrically by Folin-Ciocalteau reagent at a wavelength 765 nm in tuber peelings of cultivars less and more susceptible to common scab. The polyphenol content of tuber peeling was influenced by cultivar, site, year and age of tuber periderm and was not influenced by maturity. The highest polyphenol content was observed in potato cultivars less susceptible to the scab. Regression analysis showed that negative relation occurs between polyphenol content and potato scab incidence (P=0,006). The polyphenol content significantly decreased during vegetative period.
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