Relative Virulence of <i>Botrytis cinerea</i> and <i>B. mali</i> in Apple Lesions
Bibliographic record
Abstract
Botrytis cinerea and recently B. mali have been identified as important postharvest pathogens of apples in British Columbia (BC), Canada. Three isolates of both B. cinerea and B. mali were studied alone and in combination by inoculating mature ‘Gala’ apple fruit to compare their potential for causing decay. The fruit were incubated at 20°C for 6 and 8 days when lesion areas were calculated from lesion diameters. The lesion areas in apples inoculated with B. cinerea ranged from 1020 to 1514 mm2 compared to 130 to 293 mm2 for B. mali after 6 days. Primers developed to specifically amplify B. mali or B. cinerea were used in a PCR test to determine which Botrytis spp. was present in a particular lesion and estimate the quantity of each species. Relative fluorescent intensity of DNA extracted from apple tissue co-inoculated with B. cinerea + B. mali and amplified with the B. cinerea specific primer averaged 102.3%. On the other hand, the fluorescence produced by the B. mali primer averaged only 11.6% from the same DNA samples. These results confirmed that when both B. cinerea and B. mali are mixed together, B. cinerea becomes the dominant pathogen. Accepted for publication 2 July 2010. Published 20 September 2010.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 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".