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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Výskyt patogenů v porostu lilku bramboru
 Novák, Ondřej
This bachelor thesis is focused on the occurrence of pathogens in the potato (Solanum tuberosum L.) crop. The objectives of the thesis were to describe potato, to describe the pathogens that attack potato and, in the practical part, to observe and evaluate the occurrence of late blight, early blight (on chemically treated and untreated parts of the plot) and Y – virus of potato. In each section, pathogen incidence was monitored on 15 varieties. Late blight occurred only minimally in the crop. This was due to the dry and warm weather during the growing season, which caused minimal spread of the disease. On the other hand, early blight occurred on all varieties surveyed. This disease usually appears in the crops during the warm and intermittently wet season. Y-virus of potato was significantly present on one third of the varieties surveyed. The occurrence was caused by a record infestation of the peach aphid, which transmits the PVY virus.
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Rating the resistance of tomato (\kur{Lycopesicum annum }L.) cultivars to late blight (\kur{Phytophthora infestans})
 DUŠEK, Jakub
The aim of this thesis was to evaluate resistent varieties of tomato in the term of susceptibility to late blight. Late blight , caused by P. infestans, is the most destructive foliar disease of tomato. Some new sorts declare the resistence to late blight. The aim of our thesis was to evaluate how these varieties perform in Czech republic. It was established experiment with 14 resistent and 2 control varieties. The leaves of the plants were examined routinely for symptoms of late blight and the severity of them was recorded. The varieties Mountain Magic, De Barao, Cherry Bomb, Tomato Des Comodores, Matts Wild Cherry a Plum Regal proved high level of resistence to late blight. The varieties Phantasia, Phytovia and Mountain Merit showed lower level of resistence. Growing new varieties, with resistence to late blight can enable the reduction of fungicidal protection of tomatoes and for organical and hobby growers to make possible growing tomatoes without use of pesticides.
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