Original scientific paper
Yellow Mistletoe and White-berried Mistletoe on the Area of the Forest Administrations Našice and Osijek
Marilena Idžojtić
; Sveučilište u Zagrebu, Šumarski fakultet
Milan Glavaš
; Sveučilište u Zagrebu, Šumarski fakultet
Marko Zebec
; Sveučilište u Zagrebu, Šumarski fakultet
Renata Pernar
; Sveučilište u Zagrebu, Šumarski fakultet
Josip Bećarević
; Hrvatske šume UŠP Našice
Karmela Glova
; Hrvatske šume UŠP Našice
Stjepan Plantak
; Hrvatske šume UŠP Osijek
Abstract
The research was carried out in the area managed by Hrvatske šume d.o.o. (Croatian Forests Ltd.), Zagreb, Forest Administration (FA) Našice (6 Forest Offices: Ćeralije, Donji Miholjac, Đurđenovac, Koška, Slatina and Voćin) and FA Osijek (5 Forest Offices: Batina, Darda, Đakovo, Levanjska Varoš and Tikveš), for two mistletoe species: yellow mistletoe (Loranthus europaeus Jacq.) and white-berried mistletoe (V. album L. ssp. album). The hosts on which these two species were investigated were: Quercus petraea (Matt.) Liebl., Q. robur L., Q. cerris L., Populus alba L., P. tremula L., P. nigra L., P. ×canadensis Moench, Salix alba L., Fagus sylvatica L., Carpinus betulus L., Prunus avium L., Fraxinus angustifolia Vahl, F. pennsylvanica Marshall, Juglans nigra L. and Robinia pseudoacacia L. In the selected subcompartments older than 30 years, through a diagonal survey the number of infected and non-infected trees, as well as the number of mistletoe plants on infected trees was registered. The spatial distribution of the intensity of infection of the sessile and pedunculate oaks with yellow mistletoe in eight management units is shown.
In the area of the FA Našice the contagion of the pedunculate oak with yellow mistletoe is considerably lower (1.7 % of 27,592 examined trees) than in the area of the FA Osijek (10.1 % of 6,164 examined trees). For the sessile oak the situation is opposite, i.e. in the area of the FA Osijek the contagion is considerably lower (7 % of 27,518 examined trees) than in the area of the FA Našice (17.8 % of 11.220 examined trees). On the contaminated sessile and pedunculate oak trees there were 2 mistletoe bushes on the average. Yellow mistletoe also occurs on the Turkey oak, and was observed on 3.7 % of 5.644 examined trees. On the common beech and European hornbeam mistletoe is present in the area of the FA Osijek, Forest Office Levanjska Varoš.
In the investigated area white-berried mistletoe was not found on the narrow-leaved ash, but was present on 22.4 % of the examined green ash trees, which is an invasive species in natural narrow-leaved ash forests. White mistletoe is present on all autochthonous poplar tree species (white and European black poplar and European aspen), as well as on the Canadian poplar, and in the individual management units the contagion was varying (1.5–25 % of examined trees). In three management units, in which mistletoe was examined on the white willow, 2.5 to 17.3 % of examined trees was contaminated. In the area of the FA Levanjska Varoš mistletoe was found on the wild cherry. Of the foreign species there is considerable contagion of the black walnut trees with mistletoe (29 % of 361 examined trees), and it occurs on 12.6 % of 318 examined trees of the black locust.
Keywords
Carpinus L.; Croatian Forests Ltd. b; Fagus L.; Fraxinus L.; infestation; Juglans L.; Loranthus europaeus Jacq.; mistletoe; Našice; Osijek; Populus L.; Prunus L.; Quercus L.; Robinia L.; Salix L.; Viscum album L
Hrčak ID:
21235
URI
Publication date:
1.3.2007.
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