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Cryptosporiopsis Canker of Acer rubrum: Some Relationships Among Host, Pathogen, and Vector. G. S. Taylor, Plant Pathologist, Connecticut Agricultural Experiment Station, Valley Laboratory, Windsor 06095. Plant Dis. 67:984-986. Accepted for publication 6 March 1983. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-984.

Individual wild red maples (Acer rubrum) differed in susceptibility to isolates of the fungus Cryptosporiopsis sp. obtained from cankers associated with oviposition sites of the narrow-winged tree cricket (Oecanthus angustipennis). Isolates of the fungus differed in growth rate and appearance on bark extract and other culture media and in size of cankers produced on inoculated red maples. Observations of the insects’ behavior indicate that inoculum arrives via infested bark used to plug oviposition wounds. Exposure to normal winter environment enhances canker development and incidence of cankers varies from year to year. The tree cricket succumbs to common insecticides.

Keyword(s): buffalo treehopper (Stictocephala bubalus).