An unusual postharvest spotting disease of the comercial mushroom, Agaricus bisporus, caused by a novel pathovar of Pseudomonas tolaasii
Bibliographic record
Abstract
An unusual postharvest spotting disease of the commercial mushroom, Agaricus \nbisporus, which was observed on a commercial mushroom farm in Ontario, was found to \nbe caused by a novel pathovar of Pseudomonas tolaasii. \nIsolations from the discoloured lesions, on the mushroom pilei, revealed the presence \nof several different bacterial and fungal genera. The most frequently isolated genus being \nPseudomonas bacteria. The most frequently isolated fungal genus was Penicillium. Of \nthe bacteria and fungi assayed for pathogenicity to mushrooms, only Pseudomonas \ntolaasii was able to reproduce the postharvest spotting symptom. This symptom was \ntypically reproduced 1 to 7 days postharvest, when mushroom pilei were inoculated with \n101 to 105 cfu. Of the fungi tested for pathogenicity only a Penicillium sp. and \nVerticillium fungicola were shown to be pathogenic, however, neither produced the \npostharvest spotting symptom. \nThe Pseudomonas tolaasii strain isolated from the postharvest lesions differed from a \ntype culture (Pseudomonas tolaasii ATCC 33618) in the symptoms it produced on \nAgaricus bisporus pilei under the same conditions and at the same inoculum \nconcentration. It was therefore designated a pathovar. This strain also differed from the \ntype culture in its cellular protein profile. Neither the type culture, nor the mushroom \npathogen was found to contain plasmid DNA. The presence of plasmid DNA is therefore \nnot responsible for the difference in pathogenicity between the two strains.
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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) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| 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".