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Douglas Fir Release from Tanoak and Pacific Madrone Competition

Published online by Cambridge University Press:  12 June 2017

S. R. Radosevich ,
P. C. Passof  and
O. A. Leonard
S. R. Radosevich
Affiliation:
Dep. of Bot., Univ. of California, Davis 95616
P. C. Passof
Affiliation:
Ukiah, CA
O. A. Leonard
Affiliation:
Dep. of Bot., Univ. of California, Davis, CA
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Abstract

Broadleaf species such as tanoak [Lithocarpus densiflorus (Hook. & Arn.) Rend.] and pacific madrone (Arbutus menziezii Pursh) reduced conifer growth on previously logged or burned areas of the northern California and southwest Oregon coast range. Cut-surface applications of 2,4-D [(2,4-dichlorophenoxy)acetic acid], 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], and picloram (4-amino-3,5,6-trichloropicolinic acid) into tanoak and pacific madrone growing as overstory to Douglas fir [Pseudotsuga menziesii (Mirb.) Franco] were found to provide acceptable control for 10 years following application. Increment cores obtained from Douglas fir in treated and non-treated plots revealed substantial stem enlargement as a result of tanoak and pacific madrone control.

Type
Research Article
Information
Weed Science , Volume 24 , Issue 1 , January 1976 , pp. 144 - 145
Copyright
Copyright © 1976 by the Weed Science Society of America 

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References

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