Postplanting sprays of dalapon and atrazine to aid conifer establishment.

Edward J. Dimock; Ernest B. Collard

doi:10.2737/PNW-RP-280

Treesearch

Postplanting sprays of dalapon and atrazine to aid conifer establishment.

Informally Refereed

Authors:

Edward J. Dimock, Ernest B. Collard

Year:

1981

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-280

Source:

Res. Pap. PNW-RP-280. Portland, OR: U.S. Department of Agriculture, Forest Service Pacific Northwest Forest and Range Experiment Station. 20 p

Download (PDF 1.37 MB)

Download (PDF 1.37 MB): https://research.fs.usda.gov/download/treesearch/21256.pdf

Abstract

A mixture of dalapon and atrazine consistently controlled grasses of forbs better than either herbicide used alone. Sprayed over and around newly planted ponderosa pine (Pinus ponderosa Dougl. ex Laws.) and Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), the mixture doubled tree survival in one study, greatly enhanced height growth in another, but produced no significant gains in four studies. Protecting seedlings from herbicide spray proved beneficial in two studies, but seemed unnecessary in four others.

Keywords

Herbicides (-regeneration, grass control, forbs, dalapon, atrazine

Citation

Dimock, Edward J., II; Collard, Ernest B. 1981. Postplanting sprays of dalapon and atrazine to aid conifer establishment. Res. Pap. PNW-RP-280. Portland, OR: U.S. Department of Agriculture, Forest Service Pacific Northwest Forest and Range Experiment Station. 20 p