The objective of this diploma thesis was to determine the presence of Eutypella canker of maple (Eutypella parasitica) on maples in the area of Bohor. The research covered sycamore maple (Acer pseudoplatanus), Norway maple (Acer platanoides) and field maple (Acer campestre). The research was conducted on six plots, i.e. two plots per maple species. First, the location of plots by growing stock of individual maple species in the stand was determined. On each plot 100 trees were examined for the disease. The diameter at breast height of all maples was measured. Maples showing signs of E. parasitica infection were further examined. We recorded the height of the canker centre on the trunk and the vertical length of the canker, determined the coordinates with the help of GPS and marked them on the map. Samples of the bark from the canker were taken from the trees with signs of E. parasitica infection. These samples were examined under microscope and thus further checked for the presence of Eutypella canker of maple. Positive samples were stored in Mycotheca and Herbarium of Slovenian Forestry Institute. Five instances of Eutypella canker of maple were found on field maple. The intensity of the occurrence of Eutypella canker on all three species of maple was 0.83 %, and on the plot with field maple, it was 3%.
|
