Occurrence and Detection of<i>Globodera rostochiensis</i>on Vancouver Island, British Columbia: An Update
Bibliographic record
Abstract
The potato cyst nematode (PCN), Globodera rostochiensis, has been present in Central Saanich on Vancouver Island for at least 45 years. Eradication/control efforts have been ongoing, with regulations enacted in the early 1980s restricting the planting of host crops and movement of soil. Surveys monitoring for cyst populations have been minimal since the regulations have been in place with only one limited study in the early 1990s. In this report, a survey of eight fields was undertaken, chosen as the most likely sites that may still harbor viable PCN cysts. Conventional sampling/detection methods were considered inadequate for the detection of very low cyst populations, and an innovative bioassay was developed to improve detection while minimizing costs and labor. Viable cysts were recovered from two fields, both with past quarantine infractions. Fields with no known infractions were found free of viable cysts. Lack of viable cysts found in fields with no infractions suggests that the quarantine restrictions in place since the early 1980s have been effective in reducing or eliminating PCN from these fields. Further systematic and comprehensive retesting of all fields within the quarantine zone is now required, which could lead to the reduction or lifting of some quarantine restrictions.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.003 | 0.004 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.002 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.001 |
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".