The processes of planning, planting, and maintenance of urban trees require new strategies adapted to the changing conditions, applied on the individual tree level. Water balance studies of Hungarian oak (Quercus frainetto) and lime tree (Tilia cordata) were carried out with lysimeters. First...

The healthy development of urban trees is a prerequisite for their functionality. In this context, the design of the root zone plays a central role. In addition to optimized tree substrates, innovative sponge city systems and their effects on tree vitality are being tested in a lysimeter facility...

In the TreeNet monitoring network, the measurement area of a dendrometer on the surface of a tree trunk is just 20 mm², while the Sentinel-2 satellites cover thousands of square kilometers with a resolution of 100 m². The 2018 data show that the sometimes extremely high tree water deficits of...

Climate change is taking on striking proportions in Switzerland and extreme weather events such as winter storms, late frosts and dry years have increasingly left their mark on our forests in recent years. It must be assumed that periods of heat and drought will become even more frequent in the...

A new hazel-leaved blackberry species from East Saxony (Oberlausitz) is described: Rubus lobaviensis F. W. Sander. The currently known range size of approx. 44 sq.km is below the limit required for a regional species according to WEBER (1995, 2002); however, the species often shows a conspicuous...

The genus Populus is classified into six sections and contains about 30 species. As some of these species are cross-compatible, many hybrids naturally exist. Additionally, in the last 50 years huge breeding programs were initiated and have led to a high number of artificially produced hybrids....

This issue contains 7 articles focusing on the importance of Mendel's rules for plant breeding, the influence of Mendelian genetics on cultivar breeding in apple and sweet cherry, Mendelian genetics and grapevine breeding, identification of the vernalization locus in caraway (Carum carvi) using...

The occurrence of root pathogens of European beech (Fagus sylvatica) with the focus on Phytophthora in relation to crown- and stem-damage was studied in 34 forests stands in Lower Austria. Of these, 25 stands were infested by Phytophthora. Of in total seven recorded species, the thermophilic...

This report presents the results of the annual forest health survey in Germany in 2014. The paper provides information on drought stress in beech; nutrition of spruce; and weather and climate, protection, ground cover, and chemistry of forests in the region.

Botanical identification keys are efficient tools in species de-termination in nature. However, they are based on phenotypic traits that are influenced not only by species identity but also by environmental conditions. Moreover, they usually ignore interspecific hybridization. In this respect,...