Evaluation of cultural methods for the management of the golden nematode (<i>Globodera rostochiensis</i>) in Quebec, Canada
Bibliographic record
Abstract
Potato cyst nematodes are a major threat to potato production worldwide. In 2006, the isolation of the golden nematode, Globodera rostochiensis, in Quebec, Canada, led to the establishment of a quarantine area and the initiation of a research programme for the sustainable management of this regulated pest. In this study, the field efficacy of crop rotations and soil amendments was assessed in microplots for their potential to reduce populations of G. rostochiensis in the quarantine area. Crop rotation with a resistant potato cultivar was very effective in decreasing the population density of G. rostochiensis in soil. A single year with a cultivar carrying the H1 resistance gene reduced nematode populations by 62–95%. After 3 consecutive years of cropping to resistant potato, the number of viable eggs was zero in several microplots, and the overall population reduction was around 95%. Natural population decline with the cultivation of a non-host crop such as corn was around 30% per year. Trap cropping also showed reduced G. rostochiensis populations with results similar to the resistant cultivar. Sticky nightshade could not be established under Quebec’s climatic conditions and therefore was not a viable alternative for managing golden nematode in Quebec. Soil amendment with high rates of urea provided some reduction in populations but was not an economically viable option for managing potato cyst nematodes. Chicken manure and pig slurry did not provide a significant reduction of G. rostochiensis under Quebec field conditions.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".