Cankers in North Dakota windbreak plantings
Subtitle: survey and evaluation
By: by Oscar J. Dooling.
Contributors: United States. Forest Service. Northern Region. State & Private Forestry.
Series: Insect disease report; Report / Forest Service, Northern Region, Division of State and Private Forestry -- no. 73-10.; Report (United States. Forest Service. Northern Region) -- no. 73-10.
Publisher: USDA, Forest Service, Northern Region, Division of State and Private Forestry
Published: 1973
Place of publication: Missoula, Mont
Language: eng
Number of pages: 16
Subjects: Canker (Plant disease) -- North Dakota.; Trees -- Diseases and pests -- North Dakota.; Windbreaks, shelterbelts, etc. -- North Dakota.
Description: A survey to determine distribution and intensity of cankers and associated damage in North Dakota windbreak plantings of Russian-olive and Siberian elm was conducted in 1972. Four hundred and thirty-five (76 percent) of 574 Russian-olive examined had cankers, and 552 (72 percent) of 769 Siberian elm examined had cankers. Cankers on trees in all windbreaks except one contained the secondary fungi Cytospora sp., Dothichiza sp., and Camarosporium sp. Tubercularia ulmea, the reported pathogen, was recovered from only one windbreak. Most cankers were on small twigs and branches. The cause of windbreak decline appears to be herbicide injury, with root pruning caused by close cultivation, and soil compaction caused by livestock exerting minor effects in localized areas. Recommendations are made to reduce windbreak decline.
Notes: Caption title.

"April 1973."

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