Study of the Variety Reaction of Stevia Selection Materials to Alternaria alternata on Natural Background of Infection
Bibliographic record
Abstract
Stevia is a perennial bushy plant of the Asteraceae family originating from Northeastern Paraguay. Today, its cultivation has spread to other regions of the world, including Canada and some parts of Asia and Europe. It is also introduced successfully in the conditions of our country. Sweetness of the stevia leaves exceeds many other high-potential sweeteners and probably in the future stevia will become a major source of natural sweetener for the growing market of organic foods. In the literature are described many diseases affecting stevia, caused mainly by the pathogens of the genera – Phomopsis, Phlyctaena, Alternaria, Septoria, Rhizoctonia and others. For now the most widespread in Bulgaria is the brown leaf spot (Alternaria alternata) disease. The purpose of this study was to determine what is the reaction of different stevia origins to brown leaf spot disease and the influence on the yield. The survey examined 16 stevia origins of the selection gene pool of Agricultural Institute – Shumen. Planting is done in early May at above 10ºC of the soil. From the study it was found that: Morbidity of the studied genotypes was 14.4%, ranging from 1 to 15 plants of each origin. In natural background of infection the most productive origins are 210/9, 7E and 9E. The origins 4E and 404/7 are highly susceptible to Alternaria alternata. The potential loss of the main raw material (dry leaves mass) from the entire experimental field is 3.35 kg or 210 g of each variant.
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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 | 0.000 | 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) | 0.001 | 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".