Bibliographic record
Abstract
Clubroot, caused by the obligate parasite Plasmodiophora brassicae Woronin, has recently emerged as an important disease of canola (Brassica napus) in central Alberta. Disease development is characterized by the formation of large galls on the roots of affected plants, which hinder water and nutrient uptake and lead to yield and quality losses. Over 560 clubroot infested fields have now been confirmed in the province, and while most cases of the disease are still found in central Alberta, clubroot appears to be spreading into southern counties. The primary mechanism for pathogen dispersal seems to be the movement of infested soil on field equipment, although secondary mechanisms, such as soil and wind erosion and infested seed, have also been suggested. Until recently, the main strategy for managing clubroot on canola was rotation out of susceptible crops for four or more years, although research is underway to evaluate the efficacy of numerous other control methods common in cruciferous vegetable production, including the application of soil amendments and fungicides, and the sanitation of vehicles, machinery and equipment. The potential for biological control is also being assessed. Six canola hybrids with genetic resistance to the predominant pathotypes of P. brassicae were recently released onto the Canadian market by several companies, collectively representing one of the most important new management tools available to growers. Genetic resistance will have to be carefully managed however, since regional populations of P. brassicae are fairly diverse and pathogen virulence patterns are known to shift quickly in response to selection pressure. As such, successful long-term
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.000 |
| Scholarly communication | 0.004 | 0.002 |
| Open science | 0.002 | 0.003 |
| Research integrity | 0.002 | 0.001 |
| Insufficient payload (model declined to judge) | 0.646 | 0.490 |
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".