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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Monitoring of rusts occurence in grasses varieties
 NOVOTNÁ, Monika
The aim of this work is the accurate diagnosis of the Puccinia species of the selected turf grass species under field and laboratory conditions and evaluate influences on the intensity of occurrence. The laboratory tests will be recommended for the best stage of plants to artificial infection. The experiment was carried out in collaboration with SŠ Větrov. In the two-year follow-up (in 2011 and 2012) were at particular times of samples of infected plants, which were then evaluated microscopically. And at the same time experimental work was carried out in laboratory conditions (artificial infection) in plant material of the same origin and assessed degree assault with a precise diagnosis of the type of pathogen. Between 2011 and 2012, was higher occurence stem rust than crown rust.. From a total of 514 tests was stem rust in 379 cases, while crown rust in only 40 cases. In 95 samples was observed incidence of both simultaneously rust and mildew spores remaining plants were discovered. Greenhouse resistance tests were performed on younger plants (3 sheets) and older (6 sheets) in 16 variants, of which 4 were control. Infected leaves were spray uredispor with talc and injected with an aqueous suspension followed by looking drops and were then sealed under insulators at 23 ° C for 24 - 48 hours.
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Monitoring of rust in selected grass species and their impact on the value of fodder.
 HŘÍDELOVÁ, Lenka
The aim of the thesis is evaluation of occurence of rusts on the selected types of grass, their specific diagnosis and valorization of their influence on the important agricultural qualities. The experiment was carried out in a cooperation with SS Větrov. In a two-year period (in 2009 and 2010) the samples of infested plants, which were subsequently evaluated microscopically, were taken. The ascertained results were processed through the Kruskal-Wallis test and the Independent Group T-Test. In 2009 and 2010 the occurrence of stem rust on the tested types of grass was significantly higher than occurence of crown rust. From the total number of 513 tests stem rust was found in 353 cases, whereas crown rust was found only in 103 cases. In 27 samples the occurrence of both types of rusts was found and there was no occurence found on the rest of the plants. The results show that in our climatic conditions stem rust becomes the most frequent pathogen which causes rustiness of grass. In 2010 the results of turf experiments proved that the selection of genotype of perenne reygrass with a lower infestation by stem rust had a positive impact on health conditions and better appearance of the offspring of the selected plans. Effectivenes of selection was confirmed. Among the tested materials there were chosen very predisposed genotypes which could be useful as the infectious material in the planned greenhouse tests for the resistance against rusts. Currently, we have also been abble to recognize the genotypes which are relatively resistant against particular rusts. If their resistance is confirmed in the following period, they might be used as donors of resistance in xenogamy and as immune standards in tests. The introduced results from the first stage of cooperation are only preliminary and it will be necessary to verify them at the following stages.
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