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Ověření účinnosti ošetření osiva nízkoteplotním plazmatem s ohledem na zdravotní stav a produkční vlastnosti
Gazdík, Filip
The diploma thesis was focused on evaluation of non-thermal (cold) plasma seed treatment of cabbage (Brassica oleracea var. capitata), on its health and production properties and on the effects against Xanthomonas campestris pv. campestris (Xcc). A soil fungus Trichoderma virens (TVI) was used as additional seed treatment. The field experiment showed that microwave, low pressure, 500 W non-thermal plasma and 4 minute exposure time did not have a significant effect on Xcc, but had a positive influence - in combination with Xcc and TVI - on plants´ vitality and yield. Further, this plasma treatment, in combination with Xcc, had a negative impact on seeds´ germination. Non-thermal plasma treatment with the above-mentioned parameters proved to be unsuitable for cabbage seed treatment.
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Evaluation of cultivars tolerance of chosen vegetable assortment to fungal diseases
Maláková, Dana ; Koudela, Martin (advisor) ; Kristína, Kristína (referee)
The aim of this Diploma thesis was to assess the cultivar tolerance of a chosen assortment of butterhead lettuce, leaf lettuce, iceberg lettuce and cabbage to fungal pathogens (Bremia lactucae, Fusarium oxysporum f. sp. conglutinans).
The experiment was conducted in the laboratory conditions of the gardening department FAPPZ of the Czech University of Agriculture in growth chambers. The lettuce experiments were done in given conditions with the temperatures of 18 - 20 °C under the regime 12 hrs. of light and 12 hrs. of darkness. The cabbage experiments were conducted in given conditions under the regime 12 hrs. of light and 12 hrs. of darkness with the temperatures of 14 °C during the day and 12 °C in the night. The lettuce plants were planted in dishes on fine sand. All experiments had infected and control variants. After emergence, the experimental plants were inoculated with variants of the selected pathogen. The plants were observed in 2 - 3 day intervals throughout the whole experiment. The experiment was assessed using the modified standard method according to Pawelec et al. (2006). A modified method with a percentage scale was used to assess the lettuce experiments. Cabbage experiments were evaluated with a scale of points ranging from 0 to 9 according to the percentage of infection on the plants. The results of the methodology were determined using the program Statistica 12.
In the experiments evaluating the variety tolerance of a chosen assortment leaf lettuce and iceberg lettuce to the pathogen Bremia lactucae Bl:31, a statistically significant difference in the sensitivity to this pathogen was established. The results show that the most resistant varieties are Tarzan, Stamir, Adinal a Verala. The greatest sensitivity to the pathogen Bl:31 has a variety "Dětenická Atrakce" then Traper and Nikolaj. Effect of seed treatment with hot water (HWT) to suppress pathogen B. lactucae was statistically significant in the varieties "Dětenická Atrakce" (10% decrease) and Dubáček (7% decrease) compared with untreated infectious variant with HWT. In the sensitivity evaluation of varieties and lines of white cabbage was a statistically significant difference in infecting of pathogen Fusarium oxysporum f. Sp. conglutinans breed 1. The most significantly susceptible to the pathogen Foc was variety Pourovo late-season (degree of assault after inoculation was 6.52 points).
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Využití přípravku Agrisorb při pěstování vybraného druhu zeleniny
Novák, Martin
This diploma thesis is about using of Agrisorb hydroabsorbent for cabbage culture, planted from seeds. In literary part are named natural and synthetic substances with ability desert water and their characteristics. The describtion of cabbage growing technology, cabbage pests and diseases, special substances contents and statictical dates. Experiment was dividend in two parts - cabbage growed in field conditions and cabbage growed under glass. The aim of the field experiment was to determine the effect of Agrisorb when is applied by soaking seeds, which are then seeded directly on the field. The aim of the glass experiment was to determine the differences in germination of model culture in non-stress conditions. Than were evaluated differences of development between treated and not treated seedlings. Germination of treated seeds in field conditions was the best evaluated - with 68,5% germinated seeds. Than, plants from treated seeds had significantly higher amount of ascorbic acid in compare with control plants (396,91 mg asc.ac. / kg, it is 120,2 % in compare with control culture.) The dry weight of cones of Agrisorb treated plants was 8,96% in compare with dry weight of control plants 116,2%. It was measured the plant leaf area as well, and results shows, that plants treated by Agrisorb had 43,33 cm2 in average, it means 123% in compare with control plants.
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