Impact of commercial foliage trimming on disease suppression and yield of processing carrots in Nova Scotia, Canada
Bibliographic record
Abstract
McIsaac, G., Sanderson, K. R., Peters, R. D., Garbary, D. J. and Fillmore, S. A. E. 2013. Impact of commercial foliage trimming on disease suppression and yield of processing carrots in Nova Scotia, Canada. Can. J. Plant Sci. 93: 1155-1163. Carrot side-trimming opens the carrot canopy, permitting greater sunlight penetration and airflow. This reduces moisture build-up and creates unfavorable conditions for the development of common carrot pathogens such as Sclerotinia sclerotiorum (Lib.) de Bary. This study was carried out during the 2008 and 2009 growing seasons and was the first to examine the effects of foliage trimming on disease development in the processing carrot production region of Nova Scotia, Canada. Research focused on the effects of foliage trimming on disease suppression and yield using a commercial-sized trimmer in processing slicer carrots over consecutive growing seasons. This study was also the first to look at the effect of trimming on the suppression of Alternaria dauci (J.G. Kühn) J.W. Groves & Skolko and Cercospora carotae (Pass.), two economically important carrot pathogens causing leaf blight diseases in this region of Canada. Plots were established in commercial fields throughout Colchester County, Nova Scotia. Each field had a trimmed and an untrimmed section. All plots were assessed for disease presence at the time of trimming and again at harvest. Foliage trimming was found to have no significant (P=0.05) effect on biological and marketable yield and generated anecdotal reports of ease of crop maintenance and harvest. The severity of diseases caused by Alternaria, Cercospora and Sclerotinia varied among cultivars and significant cultivar×trimming interactions were noted in some cases. Foliage trimming is becoming standard practice in the carrot industry as several commercial carrot producers in North America have adapted the technology to suit their production needs after the prototype foliage trimmer was designed, built, and demonstrated by researchers at Agriculture and Agri-Food Canada, Charlottetown, Prince Edward Island.
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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".