Angl. resumé

The aim of this diploma thesis is assessing the determination and evaluation of pathogens species spectrum in carrot (Daucus carota), parsley (Petroselinum crispum) and pepper (Capsicum annum) seeds. The microflora was determined in laboratory conditions. The surface disinfected seeds and non-disinfected seeds were cultivated on culture medium PDA and filter paper. The level of bacterial and yeast contamination was low. The major part of pathogenswere fungi pathogens. The most often found pathogens were species from Alternaria and Cladosporium genus. The species spectrum was not different between individual varieties of carrot, parsley and pepper. In most cases, non-disinfected seeds had significantly higher amount of pathogens than the disinfected seeds.

This thesis deals with the evaluation of resistance to fungal diseases at selected crossings of grapevine. The experiment was done in 2014 at the experimental station in the cadastral region of Lednice in Moravia. 20 seedlings emerged from intersecting hybrids were tested. The experiment confirmed that the variety Bianca is a good donor of the resistance and therefore it is almost resistant to local races of pathogen of grapevine mildew. Hibernal variety is moderately resistant to grapevine mildew.

This thesis focuses on the protection of vine against fungal diseases. Application of alternative means in the form of aqueous extracts from ordinary available plant of their effect on health status Piwi varieties. The theoretical part of this thesis describes the most important fungal diseases of grapes. Further they are described interspecific varieties, which were used for the experiment. Literary part is devoted to the preparation of herbal liquors and extracts of herbs and their active substances in a plant extracts. The experimental part is devoted to the influence of herbal preparations on the health of Piwi varieties. Results were statistical and analytical evaluated. Monitored parameters were comparison with all tested variants.

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Factors that cause the development of fungal diseases is not only the state of health of trees but also their age, environment and last but not least, maintenance and care of trees. This thesis evaluates the impact of different levels and modes of damage to trees on the development of fungal diseases. Since the Highlands Region second richest in the alley, was chosen specifically Jihlavsko. This thesis consists of two parts. The first one describes the history of the alley, the importance and functions, their legislative security and characteristic alley harmful factors, including fungal diseases. The second part focuses on the specific model alley, where they are identified specific problems. Based on an evaluation of all aspects of the individual alleys a proposal to the preservation and restoration of these alleys.

The goal of the thesis Occurrence of biotic and abiotic damages to forest trees in FMU Chřibská (Forest Management Unit Chřibská) is survey of aforementioned damages within forest properties owned by city of Chřibská in Northern Bohemia. The thesis includes list of damages from years 2007 - 2016 and performs study of possible causes of some of those damages.

Diploma thesis is aimed at influence of microclimate and soil properties on occurrence of the barley leaf plant pathogens. The attention is devoted to parasitic fungi of barley Pyrenophora teres, Pyrenophora graminearum, Ramularia collo cygni and Rhynchosporium secalis. The early determination of plant disease leads to possibilities of control and in this way to keep harmful agent under economic damage threshold. The evaluation of occurrence of fungal pathogens on three localities with different microclimate and soil properties comprises the part of my work. Three barley varieties Malz, Francin and Bojos were evaluated and compared from the point of view of susceptibility to fungal pathogens, subsequently. The evaluation was carried out on the farm HESAKO s.r.o Velké Heraltice in Moravian Silesian Region. The occurrence and development of particular pathogens was under economic damage threshold in the year 2015 in dependence of variety resistance, good plant disease practices and course of the weather.

No description available.