Pathogenicity of <i>Leptographium longiclavatum </i>associated with <i>Dendroctonus ponderosae</i> to <i>Pinus contorta</i>
Bibliographic record
Abstract
We assessed the pathogenicity of Leptographium longiclavatum sp. nov., a recently reported fungal associate of the mountain pine beetle, Dendroctonus ponderosae (Hopkins, 1902). In September 2003, 30 lodgepole pines (Pinus contorta Dougl. ex Loud. var latifolia Engelm. ex S. Wats) between 98 and 130 years old were inoculated with L. longiclavatum, the known pathogen Ophiostoma clavigerum, or an agar control. Inoculation densities consisted of 200 and 800 points/m2 in a 60 cm wide band at breast height. The inoculated trees were examined in July 2004, 9 months after inoculation. Five of six trees inoculated with L. longiclavatum at high density (800 points/m2) developed yellow crowns, while the foliage of all trees inoculated at low density (200 points/m2) remained green. Both O. clavigerum and L. longiclavatum generated significantly longer necrotic lesions in the phloem and more occlusions in the sapwood than in the agar controls. In addition, the sapwood colonized by both fungi had a reduced moisture content compared with controls. These results suggest that L. longiclavatum is pathogenic and may contribute to the mortality of mountain pine beetle infested pines.
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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 | 0.000 | 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 | 0.000 | 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".