Vyhodnocení výskytu patogenů jabloně na lokalitě Lysice

In the Czech Republic and around the world are the most commonly grown fruit trees, apple trees. The yield and also its quality is dependent on the weather, location, but also largely on the proper protection against harmful organisms. The thesis contains an overview of the most important viral, bacterial and fungal pathogens, mainly the work is focuses on the agent of apple scab, Venturia inaequalis. In the locality Lysice were evaluated attacked three major fungal pathogens: Venturia inaequalis, Podosphaera leucotricha and Monilinia fructigena, on the varieties ´Idared´, ´Jonagold´, ´Rubín´ and ´Šampion´. The attack of leaves by agent of the apple scab was the most evident in the varieties ´Rubín´ and ´Jonagold´ for which was established middle occurrence class of pathogen. The attack of fruits was minimal, because protection was made correctly. For all varieties was evaluated high frequency of apple powdery mildew, while primary infection (15 to 53 % of monitored leaves). Due to the application of chemical protection were secondary infections weaker (19 to 37 % of monitored leaves) than primary infections. By Monilinia fructigena was the most attacked variety ´Rubín´ (56 % of monitored fruits). The variety ´Rubín´ was the most sensitive for all the evaluated pathogens. For particular pathogens was devised suitable protection system