In June 2015, bleeding cankers were observed on the main stem of black oaks (Quercus velutina) also damaged by the from gall wasp, Zapatella davisae (Hymenoptera: Cynipidae) in Barnstable County, Massachusetts, USA. The sapwood underneath bleeding cankers was darkly discoloured and contrasted...

Appropriate management of invasive fungi requires adequate understanding of their global diversities and movement histories. The fungus Leptographium procerum is associated with root-colonizing forest insects in pine forests throughout the world, and may have contributed to the aggressive behaviour ...

Papers are presented focusing on biological control agents and how they are regulated across the EPPO region, how their use can be facilitated and how they may contribute to slowing the spread of invasive pests and mitigating the damage they cause. Three papers deal with Dryocosmus kuriphilus, a...

The exotic redbay ambrosia beetle, Xyleborus glabratus Eichhoff, has become a serious invasive pest in the USA, now established in eight southeastern states. Females are the primary vectors of a fungal pathogen, Raffaelea lauricola, that causes laurel wilt, a lethal disease of trees in the family...

Pitch canker, caused by the pathogen Fusarium circinatum, is a serious disease of pines, Pinus species. It is a threat to natural and planted pine forests, and to date it has invaded countries across five continents. Pine-feeding insects can play a key role in the epidemiology of the disease, as...

The canker pathogen Geosmithia morbida is known to be transmitted to Juglans species by the bark beetle Pityophthorus juglandis, and to lead to development of thousand cankers disease. In an Indiana-wide trap-tree survey of ambrosia and bark beetles and weevils colonizing stressed Juglans nigra, G. ...

In May 2014, early thousand cankers disease (TCD) symptoms were observed on English walnuts (Juglans regia) in Italy. Canopies showed yellowing, wilting and dieback of the youngest twigs and a number of small brown cankers. Longitudinal and radial sections sampled through the cankers revealed grey...

In the summer of 2012, a survey for thousand cankers disease (TCD) incidence in English walnut (Juglans regia) in orchards in California, USA, identified many trees with walnut twig beetle (Pityophthorus juglandis; WTB) activity and characteristic TCD symptoms. Both the J. regia scion and its...

The invasive redbay ambrosia beetle, Xyleborus glabratus, is the primary vector of Raffaelea lauricola, a symbiotic fungus and the etiologic agent of laurel wilt. This lethal disease has caused severe mortality of redbay (Persea borbonia) and swampbay (P. palustris) trees in the southeastern USA,...

Information is extensive on the consequences of climate change on diverse spheres, such as an increase in rates of desertification, increase in the frequency and intensity of hurricanes and tropical storms, and changes in the patterns of distribution and reproduction of flora and fauna. This paper...