Cold-Induced Cankers and Associated Fungi in a Sycamore Seed Orchard

Francis I. McCracken; R. Rousseau

doi:10.2737/SO-RN-366

Cold-Induced Cankers and Associated Fungi in a Sycamore Seed Orchard

Informally Refereed

Authors:

Francis I. McCracken, R. Rousseau

Year:

1991

Type:

Research Note

Station:

Southern Research Station

DOI:

https://doi.org/10.2737/SO-RN-366

Source:

Res. Note SO-366. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 3 p.

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Abstract

Of the trees in a 6-year-old sycamore seed orchard in Carlisle County, KY, 66 percent developed obscure vertical cankers in the spring of 1990. A variety of wound-invading saprophytes, including Hyalodendron sp., Stachylidium sp., Botrytis sp., Phialophora sp., Trichoderma sp., and Fusarium sp., were isolated from canker wood. Weather records indicated that trees were subjected to abnormally low temperatures from December 15-25, 1989. Five clones demonstrated an apparent tolerance to the cold damage, but there was no correlation between clone response and geographic origin of the clones. The consistent southern orientation of cankers, record low temperatures in 1989, and apparent absence of virulent pathogens strongly suggest that the cankers resulted from freeze damage.

Keywords

Plantnus occidentalis, wound-invading fungi

Citation

McCracken, Francis I.; Rousseau, R. 1991. Cold-Induced Cankers and Associated Fungi in a Sycamore Seed Orchard. Res. Note SO-366. New Orleans, LA: U.S. Department of Agriculture, Forest Service, Southern Forest Experiment Station. 3 p.