Evaluation of the effectiveness of Chondrostereum purpureum for the control of mechanically brushed trembling aspen (Populus tremuloides Michx.) suckers in a 2-year-old conifer plantation: third-year results (MOF EP 1135.05)
Bibliographic record
Abstract
Several vegetation control options are currently available to British Columbia foresters. Some of the more common options, such as herbicide application or manual brushing operations, may be limited in their effectiveness for a number of reasons. For example, public opposition may curtail the operational application of herbicides, while site conditions may preclude the use of manual brushing of competing vegetation (Boateng and Comeau ). Other less common methods may be restricted in their use to specific ecosystems. The Research Branch of the B.C. Ministry of Forests, in partnership with the Canadian Forest Service, the Biology Department of the University of Victoria, and Mycologic Inc., are currently involved in testing the use of a fungus, Condrostereum purpureum, as a method of controlling vegetation that competes with planted conifer seedlings. The purpose of this research was to evaluate promising methods for managing vegetation in conifer plantations. Condrostereum purpureum is an ideal candidate for vegetation control (Harper et al. ). It occurs naturally in British Columbia forests. Because it will attack only woody species that have been selectively wounded, the effect of this mycoherbicide is restricted to the target vegetation. This extension note reports on the mortality and growth response of trembling aspen (Populus tremuloides Michx.) suckers years after application of the fungus Chondrostereum purpureum ([Pers.: ex Fr.] Pouzar). The data presented here were collected from one of two British Columbia installations that are part of a larger national research program testing the efficacy of C. purpureum. This extension note does not discuss the field trial that tested the effectiveness of C. purpureum in controlling the growth of Sitka alder (Alnus sinuata [Regel] Rydb). For further information on C. purpureum and its control of Sitka alder see Harper et al. ().
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".