The effects of Vexar® seedling protectors on the growth and development of lodgepole pine roots

Crop Protection
By: , and 



The effects on the growth and development of lodgepole pine roots from the Vexar® tubes used to protect seedlings from pocket gopher damage were studied in the Targhee National Forest, Idaho and the Deschutes National Forest, Oregon. At each site, Vexar-protected and unprotected seedlings, with and without above-ground gopher damage were examined after six growing seasons for root deformities and growth. Undamaged seedlings exhibited greater growth, reflecting the importance of non-lethal gopher damage as a deterrent to tree growth. Protected seedlings with similar damage history as unprotected seedlings had greater root depth than unprotected seedlings, although unprotected seedlings with no above-ground damage generally had the greatest root weight. In general, the percent of seedlings with root deformities was greater for the unprotected seedlings than for the Vexar-protectd seedlings, although this could be largely due to the greater care required to plant protected seedlings. Acute deformities were more common for unprotected seedlings, whereas root deformities with less severe bending were more common for protected seedlings. The incidence of crossed roots was similar for protected and unprotected seedlings on the Deschutes site, where enough occurrences of this deformity permitted analyses. Protected seedlings were similar in root abundance, root distribution, root size and vigor to the unprotected seedlings, with some indication from the Deshutes study site that root distribution was improved with Vexar protection.

Publication type Article
Publication Subtype Journal Article
Title The effects of Vexar® seedling protectors on the growth and development of lodgepole pine roots
Series title Crop Protection
DOI 10.1016/S0261-2194(96)00064-6
Volume 16
Issue 1
Year Published 1997
Language English
Publisher Elsevier
Contributing office(s) Alaska Science Center
Description 5 p.
First page 57
Last page 61
Country United States
State Idaho, Oregon
Other Geospatial Targhee National Forest, Deschutes National Forest
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