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The Effects of Diffuse and Spotted Knapweed Competition on the Survival and Growth of
Lodgepole Pine and Douglas-fir Seedlings
The Effects of Diffuse and Spotted Knapweed Competition on the Survival and Growth of Lodgepole Pine and Douglas-fir Seedlings |
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Although most documented infestations of noxious weeds currently occur on grassland and
open forests, these introduced plants are increasingly becoming a concern as they become
established in forest ecosystems. Their potential distribution, persistence and impact in
the forests of B.C. has not been documented. This research examined the growth potential
of spotted and diffuse knapweed in a mid-elevation forest (transitional IDF/MS) and evaluated
the impact of the knapweeds at different densities on the growth and survival of planted conifers.
The objectives of this research were to (1) determine the effects of diffuse and spotted knapweed density on the survival and growth of lodgepole pine and Douglas-fir seedlings; and, (2) determine the threshold density of diffuse and spotted knapweed which results in a decline in survival and growth of lodgepole pine and Douglas-fir seedlings. |
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