Survival of <i>Ascochyta rabiei</i> in chickpea residue on the Canadian prairies
Bibliographic record
Abstract
Ascochyta rabiei (teleomorph Didymella rabiei) overwinters in infested chickpea residue, which serves as a source of primary inoculum. Survival of the pathogen was assessed in studies where infested chickpea residue was maintained at the soil surface (0 cm) or buried at a 5- or 10-cm depth for up to 4 years, and in field trials at two locations where disease severity was assessed after 1, 2, and 3 years of nonhost crops. The burial studies indicate that the pathogen population increases in the year following an infected crop, and then declines over time, but that A. rabiei is still present at low levels in a field 4 years after the initial crop. However, the level of viable inoculum is low after 3 years. The field trials confirmed that the pathogen is still present following three intervening crops, but that inoculum pressure declines substantially after two intervening crops. We conclude that at least two nonhost crops are needed between successive crops of chickpea to reduce disease risk, where ascochyta blight was observed in the initial crop.
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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 | 0.001 | 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".