Leaf spot diseases of spring wheat in southern Manitoba farm fields under conventional and conservation tillage
Bibliographic record
Abstract
Leaf spot diseases were monitored in 248 conventional and conservation till fields in southeastern and southwestern Manitoba from 1993 to 1997. Environmental variables for the two regions, and inform ation on the previous crop in each field were obtained. The pathogens commonly isolated from leaf tissue were Phaeosphaeria nodorum, Mycosphaerella graminicola, Pyrenophora tritici-repentisand Cochliobolus sativus. Isolations of P. nodorumand M. graminicolawere significantly higher in conventional than in conservation till fields; the reverse was true for P. tritici-repentis. Both prevalence, defined as the presence of the disease in a field, and isolation frequency of the various pathogens from diseased leaf tissue appeared higher in eastern than western Manitoba. Conditions were warmer and wetter in the eastern region. More M. graminicolawas isolated from fields of hard red spring wheat compared with durum and more P. tritici-repentisfrom durum than hard red spring wheat. Phaeosphaeria nodorumand C. sativus...
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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".