Determining the age of dwarfmistletoe infections on red fir

Robert F. Scharpf; J.R. Parmeter

Treesearch

Determining the age of dwarfmistletoe infections on red fir

Informally Refereed

Authors:

Robert F. Scharpf, J.R. Parmeter

Year:

1966

Type:

Research Note

Station:

Pacific Southwest Research Station

Source:

Res. Note PSW-RN-105. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p

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Abstract

Dwarfmistletoe on red fir in California can be aged rapidly and reliably by counting the number of annual rings showing swelling and then adding 1 year for the lag period between infection and swelling. Infections were correctly aged in 70 percent of the cases observed, and were aged to within 1 year in the other 30 percent.

Citation

Scharpf, Robert F.; Parmeter, J.R., Jr. 1966. Determining the age of dwarfmistletoe infections on red fir. Res. Note PSW-RN-105. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p