An invasive sawfly Aproceros leucopoda Takeuchi, 1939, which originates from East Asia, has colonized elms (Ulmus spp.) in Austria, Hungary, Poland, Romania, Slovakia and the Ukraine, at least since 2003. In Europe, the larvae can completely defoliate native and non-native elm trees and may cause...

Occurrence of weakly pathogenic O. ulmi and aggressive O. novo-ulmi (the latter was isolated from the Asian type of U. pumila, relatively resistant to Dutch elm disease) is reported from St. Petersburg, Russia. Appearance of the Dutch elm disease is associated with spread of the most aggressive ...

This paper focuses on the biocenotic aspects of the pathogenic fungus Ophiostoma ulmi, and its relation to host trees (Ulmacea) and vector insects, particularly Scolytus multistriatus, with a view to improving integrated pest management programmes. Information is included on (1) the effects on O....

Brief notes are given on the history, distribution and symptoms of the disease in the UK, causal agents (Ophiostoma ulmi and O. novo-ulmi, transmitted mainly by Scolytus scolytus and S. multistriatus), elm population (Ulmus glabra and U. minor s.l., including U. procera) and its susceptibility, and ...

The city of Fredericton, New Brunswick, has saved 70% of its elms [Ulmus spp.] since Dutch elm disease (Ceratocystis ulmi [Ophiostoma ulmi]) was first found in 1961. Most elms in surrounding areas have been destroyed. The report describes the efforts to control the disease and its vector (...

M. artocreas was found in elm wood with S. multistriatus, a vector of the Dutch elm disease fungus (Ceratocystis ulmi), in Melbourne. A possible relationship between the beetle and this Basidiomycete is being investigated.

Early in 1982, large numbers of wilting elms (Ulmus pumila) were observed in the Huocheng region of north-western China, arousing fears that they were infected with Dutch elm disease [caused by Ceratocystis ulmi]. Scolytids breeding in the trees were identified as Scolytus schevyrevi, suspected as...

The feeding preference of Scolytus multistriatus, a vector of Dutch elm disease [caused by Ceratocystis ulmi], on Ulmus carpinifolia [U. minor] and U. laevis was studied in a net tent in the field in Italy in 1989. Newly emerged adults were introduced into the tent containing 4-year-old trees, 8 of ...

A laboratory method is described for the rearing of larvae of the scolytids Scolytus multistriatus and S. scolytus on an artificial diet following exposure to cultures of microorganisms. In control colonies, the natural mortality rate for S. multistriatus and S. scolytus was 21.2% and 17.6%, resp....

Chlorpyrifos (0.5%) was applied to mature elm trees (Ulmus americana) in Ontario for the control of Hylurgopinus rufipes and Scolytus multistriatus, vectors of Ceratocystis ulmi, with either a hydraulic sprayer or a mist blower, and the deposition of chlorpyrifos on bark samples was measured by...