Fusarium wilt of field-grown muskmelon in British Columbia
Bibliographic record
Abstract
A wilt disease of field-grown muskmelon (Cucumis melo L. var. cantalupensis) was observed during the 1999 and 2000 growing seasons on three farms in the semi-arid interior region near the Okanagan Valley of British Columbia. Initial symptoms were yellowing and wilting of leaves, which sometimes occurred unilaterally; in some cases, this was followed by plant death prior to flowering. The crown area of diseased plants had dark brown lesions that progressed into lateral branches for distances of 45—75 cm. Some lesions also extended into the developing fruit, which frequently became infected and rotted. Stem lesions were accompanied by dark brown exudate droplets and necrosis extended into the cortical and vascular regions. Plants with fruit collapsed when temperatures exceeded 25-s30°C in mid-July and early August. White mycelium developed on the infected crown area and on fruits collected from mature plants in the field, after incubation under high humidity conditions, and macroconidia and microconidia of Fusarium oxysporum Schlechtend.:Fr. were produced. A number of muskmelon cultivars were affected, and the most susceptible were Galia and Castella, while Athena appeared unaffected in the field. Pathogenicity tests demonstrated that muskmelon was the only susceptible host and no disease symptoms developed on cucumber (Cucumis sativus L.), watermelon (Citrullus vulgaris Eckl. & Zeyh), or squash (Cucurbita pepo L.). Based on symptomology and host range, the pathogen was identified as F. oxysporum Schlechtend. f. sp. melonis (Leach & Currence) W.C. Snyder & H.N. Hans. Inoculation of a set of differential muskmelon cultivars revealed that the pathogen was F. oxysporum f. sp. melonis race 1. The pathogen was recovered from diseased transplants in a propagation greenhouse and from seed recovered from naturally infected fruits on mature plants in the field. This is the first report of fusarium wilt of muskmelon in British Columbia, and the first report of race 1 of F. oxysporum f. sp. melonis in Canada.
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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".