The dieback of common ash (Fraxinus excelsior) caused by Chalara fraxinea was recorded first time in Hungary in May and June 2008 in two forest management units in northwestern Hungary. Typical symptoms occurred as wilting of the shoots, necrotic bark lesions, dieback of the twigs of 1-2 years, and ...

An experiment was conducted to study the branch withering of cedar in order to control the occurrence and spread of the disease in Baoding City. The pathogen of branch withering of cedar was isolated and identified as Dothiorella sp. of Sphaeropsidales according to its cultural and morphological...

This issue contains 6 papers presented at the Variable retention forestry science forum. The first paper summarizes the important messages presented during the plenary session of the forum and provides a reference list outlining the latest research findings in the area of variable retention. The...

Plantations of rapidly growing trees are becoming increasingly common because the high productivity can enhance local economies, support improvements in educational systems, and generally improve the quality of life in rural communities. Landowners frequently choose to plant nonindigenous species;...

Fusarium circinatum is the casual agent of the disease known as pitch canker and has been considered one of New Zealand's most undesirable and unwanted exotic forest pests. Pitch canker is present in a variety of locations worldwide. However, the behaviour of this disease varies considerably...

This 2007 annual report of the Institute for Commercial Forestry Research includes research reports on: Acacia and Eucalyptus spp. tree improvement; plantation re-establishment; and sustainable forest productivity. Summaries of two industry-level research initiatives of the Institute are given: (1) ...

This special issue contains 11 papers on the cell and molecular biology, physiology and biochemistry, ecology, genetics, mycology and plant-microbe interactions, and structure and development of poplars in Canada. The papers are entitled: (1) Trees of the people: the growing science of poplars in...

Symptoms of Sphaeropsis sapinea in Pinus nigra are described. Plantations of subsp. nigra var. austriaca in the Jena region of Thüringen, Germany, suffered severe damage in 2004. Weather conditions during 2000-04 are discussed, especially high precipitation in 2002 followed by the dry hot summer of ...

This study was conducted in a tropical mountain ecosystem to examine the ectomycorrhizal (EM) fungal communities in a secondary pine-oak forest under different silvicultural practices. Species richness was analysed by examining ectomycorrhizal root tips and sporocarps in a control, seed tree...

Nitrogen (N) cycling in terrestrial ecosystems is complex since it involves the closely interwoven processes of both N uptake by plants and microbial turnover of a variety of N metabolites. Major interactions between plants and microorganisms involve competition for the same N species, provision of ...