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The Issues of Spread of Slender Meadow Foxtail(Alopecurus myosuroides Huds.) on Arable Land and the Methods of its Regulation.
JUSKO, Vladimír
This research paper focuses on One Year Slender Meadow Foxtail weed and options for its regulation. Slender Meadow Foxtail has become a significantly localized weed and it is necessary to stop it from spreading further. In certain locations the presence of One Year Slender Meadow Foxtail is very high; for example in Zitmunice in the district of Ceske Budejovice. This weed is to be found mainly in winter grain (cereal), rape (canola) growth, free growing spring grain (cereal), and also in clover growth. This paper describes the presence of One Year Slender Meadow Foxtail in spring barley and different methods of regulating its presence. Experiments with whether the amount of herbicide influences the regulation of weed growth have been carried out at selected locations.
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Methods of regulation the occurrence thaliana violet (Viola arvensis Murray) on arable land
MACHÁČEK, Václav
Due to repetitive planting of certain crops in the crop rotation process, there came to be a loss of certain weed species on the cultivated land, but because of this, a small selected number of species, because of there frequency and abundance, played an import role in the cultivated soil, (or harvest). Currently one of these weed species is the violet thaliana, which occurs in all cultivated crops, especially cereals and oilseeds. The significance of this harmful average weed is increasing significantly. Therefore an attempt was established on the farm, DZV Nova Bystrice. The aim of this experiment is to regulate thaliana violet (Viola arvensis Murray) on arable land.
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Methods of weed control on perennial grassland
ONDRÁK, Aleš
The control of perennial weed species, which grow on permanent grass growths, is an increasing problem for the farmers. Their regulation is very difficult and expensive. Farmers should primarily focus on avoiding weed to excess. This expresses the need of finding cheap and advantageous regulations that will be able to prevent weed from excessing. The aim of this work is to contribute to the expansion of the knowledge about the appropriate regulatory precaution and the possibilities of its usage. There were observed the most represented weed species on permanent grass growth in ZD Třebelovice. Mostly, the land sorrel and dandelion medical Hinoki were found. Also, the influence of mowing on the presence of perennial weed species and the influence of chosen herbicide application were observed.
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The methods of regulation the Elytrigia repens (L.) Desv. on arable land
KOCEK, Václav
Weed infestation of the arable land by persistent weeds is serious problem today. Very dangerous species occuring in all crops, not just only on the arable land, is "Elytrigia repens". It's spread is connected with decrease the level of tillage and with reduction of agrotechnical measures. The target of my thesis is to broadening of knowledges and to suggest other possible solutions of regulation of the occurrence of "Elytrigia repens". SO we did an herbicidal attempt at "Triticum aestivum", which was focused on chemical regulation of this weed. There were used three herbicidal products in different variants. Using of herbicidal products reduces the occurrence of weed species.
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Studium a ochrana dřevin: Monitoring zdravotního stavu dřevin a sledování příčinných souvislostí šíření významných patogenů pro zlepšení ekologické stability a druhové diverzity s ohledem na klimatické a antropogenní vlivy
Agentura ochrany přírody a krajiny ČR, Brno ; Výzkumný ústav Silva Taroucy pro krajinu a okrasné zahradnictví, Průhonice ; Agentura ochrany přírody a krajiny ČR, Praha ; Zamarská, Sylva ; Vágnerová, Irena ; Štajerová, Radka ; Mračanská, Eva ; Motrjlová, Petra ; Kunce, Petr ; Hausvaterová, Svatava ; Fišarová, Eva ; Petruš, Josef ; Koželuhová, Kamila ; Mertelík, Josef ; Červenka, Michal ; Strnadová, Veronika ; Švecová, Anna ; Černý, Karel ; Holub, Vladimír ; Gregorová, Božena
Ve zprávě jsou modelově zpracovány výsledky změn zdravotního stavu dřevin za období posledních devíti let na jedné z dlouhodobě monitorovaných lokalit. No všech modelových lokalitách byla provedena revize četnosti dřevin jednotlivých taxonů a vyhodnoceny změny v jejich početním a druhovém zastoupení. Byla ukončena 1. etapa výběru modelových lokalit na území celé ČR k monitorování zdravotního stavu dřevin a biomonitoringu závažných chorob a patogenů, s důrazem na výskyt a šíření onemocnění, která způsobují hromadná hynutí dřevin. Výzkum byl orientován na hynutí olší, topolů a dalších významných dřevin a výskyt nebezpečných parazitických mikroorganismů. Průběžně je prováděna syntéza klimatických faktorů ve vztahu k modelovým lokalitám. Z antropogenních negativních vlivů bylo hodnoceno poškození dřevin herbicidy a ořezem
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Toxicity of selected substances for spiny-cheek crayfish
MAHOVSKÁ, Ivana
The thesis examined the toxicity of selected compounds for spiny-cheek crayfish (Orconectes limosus) in laboratory conditions. Tested the acute toxicity of the insecticide Diazinon 60 EC and herbicide Roundup Biaktiv. Tests were chosen to juveniles spiny-cheek crayfish (Orconectes limosus), and juvenile and adult specimens of signal crayfish (Pacifastacus leniusculus).These species of crayfish have been selected as an easily accessible model organism. Both species of crayfish spreading and in Europe they are unoriginal. Work focused on the observed toxicity of these substances on spiny-cheek crayfish and signal crayfish and the demands on the quality of the environment.
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Biology and control of catchweed
VONDRUŠKA, Jakub
A very limited range of crops provides the human nutrition. In some time there was selected a little amount of weedy species that plays an important role with respect to quantum and danger. Galium aparine belongs to these species. Therefore an herbicide experiment was carried out with Triticum aestivum catering for a chemical regulation of this weed. In particular 26 varieties of a half of a hectare there was used 21 herbicide preparations and their combinations altogether in demanding conditions of low preparation of soil. It was realised at a land with a large amount of Galium aparine. Most of the preparations had a very good effect regarding the actual control. At some of them Galium aparine nevertheless outgrew and produced seeds. Although these seeds were produced in a little amount, they supply the reserve in a soil. In the literary recherche are described biology, harmfulness and potential methods of regulation of Galium aparine.
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