Seasonal and daily variation in the airborne concentration of <i>Gibberella zeae</i> (Schw.) Petch spores in Manitoba
Bibliographic record
Abstract
The aerial concentration of ascospores and macroconidia of Gibberella zeae (anamorph Fusarium graminearum) within small inoculated plots was measured over 2 years (1999 and 2000) in Manitoba. In July 1999, a 30 m × 30 m area was inoculated with corn kernels infested with G. zeae. Ten Rotorod spore samplers were set up in a line transect, trapping airborne ascospores of G. zeae from 1800 to 0200. Ascospore concentration was high 1 to 4 days after rainfall exceeding 5 mm. Daily ascospore concentrations ranged from 0 to 214 m−3. Daily macroconidial concentrations ranged from 0 to 42 m−3. In 2000, a 3 m × 3 m area was inoculated with corn kernels infested with G. zeae, and a Burkard 7-day spore sampler was set up in the centre. Higher numbers of both ascospores and macroconidia were trapped in 2000 than in 1999. The airborne concentration of ascospores started to increase between 1500 and 1700 and coincided with the lowest daily relative-humidity values. Ascospores continued to be trapped until 0400. The highest concentration of ascospores occurred at 2100, with a maximum of 15 233 m−3. Fewer ascospores were trapped between 0500 and 1400, ranging from 0 to 167 m−3. As in 1999, high ascospore concentrations were detected after rainfall exceeding 5 mm. Compared with the number of ascospores, fewer macroconidia were trapped, with daily concentrations ranging from 0 to 567 m−3. An increased understanding of airborne inoculum is important for developing local-risk assessment models and strategies for managing fusarium head blight.
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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 | 0.000 | 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 | 0.000 | 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".