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Modern fungicides and mechanism of their action
Zaleš, František ; Gabriel, Jiří (advisor) ; Ptáček, Petr (referee)
Fungicides are compounds, which are able to kill a fungi (they are therefore fungicidal), or they are able to slow or stop growth of a fungi (they are therefore fungistatic). Some fungicides also have insecticidal properties and can offer dual protection. This bachelor thesis is mainly dealing with fungicides, which are used to protect wood and wooden constructions from wood decaying fungi. Part of this bachelor thesis is a brief overview of wood decaying fungi and also an insight into the history of fungicides, but the main goal of this thesis is to offer a survey of currently used fungicides for wood protection against wood decaying fungi and also describe the mechanism of their action. Keywords: fungi, fungicides, buildings, general threat, wood decay, mode of action
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Zhodnocení zdravotního stavu dřevin z hlediska výskytu dřevních hub v sídelní zeleni obce Hybrálec
Hegerová, Aneta
In this bachelor thesis, health assessment of woody plants focused on occurrence of wood-inhabiting fungi in public greenery of the Hybrálec village (Vysočina region). In total 123 trees were evaluated. The field investigation was conducted regularly from spring 2018 to autumn 2019. This research was focused on monitoring annual and perennial fruiting bodies of fungi. Ten following fungal species were recorded: Ganoderma adspersum, Hypholoma fascilucare, Kretzschmaria deusta, Laetiporus sulphureus, Pleurotus ostreatus, Phellinus igniarius, Pholiota squarrosa, Pholita adiphosa, Schizophyllum commune and Stereum hirsutum on six tree species – Acer platanoides, Aesculus hippocastanum, Fraxinus excelsior, Quercus robur, Salix alba and Tilia cordata. Selected trees were measured by an acoustic tomograph and in one case the microscopy method was used to identify the fruiting body of Ganoderma. According to the health assessment, the treatments were proposed for each of the trees to keep the best operational safety of the trees. The total price of all treatment is estimated 54,780 CZK.
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Dynamika rozkladu tlejícího dřeva v přirozených temperátních lesích
Přívětivý, Tomáš
The decomposition dynamics of deadwood was investigated using robust 40-years-long temporal dataset and physical properties of decaying logs in alluvial, fir-beech and fir-spruce-beech natural forests. While the downed logs of most alluvial tree species are decomposed in 23-42 years depending on DBH, the large-sized logs of Quercus robur had a residence time 73 years. Deadwood of Fagus sylvatica decomposed completely in 30-53 years and Abies alba in 53-95 years depending on the macroclimatic conditions and DBH. Deadwood of Picea abies had a decomposition time 58-81 years on the site of a mountain mixed forest. In addition, the effect of the mortality mode and position of logs on the decomposition time was confirmed. Evaluation of deadwood density on sampled logs showed that the remaining mass (decay rate) varies greatly between the logs with the same values of time since death. This confirmed the need for robust data for observations about deadwood decomposition.
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Modern fungicides and mechanism of their action
Zaleš, František ; Gabriel, Jiří (advisor) ; Ptáček, Petr (referee)
Fungicides are compounds, which are able to kill a fungi (they are therefore fungicidal), or they are able to slow or stop growth of a fungi (they are therefore fungistatic). Some fungicides also have insecticidal properties and can offer dual protection. This bachelor thesis is mainly dealing with fungicides, which are used to protect wood and wooden constructions from wood decaying fungi. Part of this bachelor thesis is a brief overview of wood decaying fungi and also an insight into the history of fungicides, but the main goal of this thesis is to offer a survey of currently used fungicides for wood protection against wood decaying fungi and also describe the mechanism of their action. Keywords: fungi, fungicides, buildings, general threat, wood decay, mode of action
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