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Studies on the walnut twig beetle (WTB), Pityophthorus juglandis, in relation to its association with Geosmithia morbida, its survival in felled logs, and its sensitivity to temperature extremes
The walnut twig beetle (WTB, Pityophthorus juglandis) is the vector of Geosmithia morbida and a causal agent of thousand cankers disease (TCD) of black walnut (Juglans nigra). In addition to aggressive feeding by WTB, ...
The biology of Geosmithia morbida and susceptibility of walnut and hickory species to thousand cankers disease
Since 2001 widespread mortality of black walnut (Juglans nigra) has been reported in Colorado, USA. Affected trees initially show a yellowing and thinning of leaves in the upper crown, followed by twig and branch dieback ...
Management options for the walnut twig beetle, Pityophthorus juglandis blackman, vector of the fungal canker pathogen Geosmithia morbida
The walnut twig beetle, Pityophthorus juglandis (Blackman) and its fungal associate Geosmithia morbida have recently been discovered to produce thousand cankers disease. Pityophthorus juglandis is native to the southwestern ...
Information on emergent insect associated tree diseases including epidemiological studies of drippy blight disease of oak and thousand cankers disease of walnut
Contributor:Sitz, Rachael A.
Two emergent disease complexes called drippy blight and thousand cankers have become injurious to hardwood trees in communities across the urban corridor of Colorado. In order to better understand these disease complexes, ...