The Interrelation between Natural Enemies of the Invasive Plant Lepidium draba L., Established in a Natural Pasture in Eastern Romania
Bibliographic record
Abstract
Lepidium draba L. (family Brasicaceae), originally from Europe, is a problematic plant in many agricultural ecosystems in Romania. A literature survey revealed that 196 phytophagous organisms are associated with L. draba, and 80 of them were found during field surveys. In Romania Ceutorhynchus cardariae, Psylliodes wrasei, and Aceria drabae are the most promising biological agents available for controlling L. draba. Observations were made in natural pastures by the Department of Iassy in eastern Romania in 2008. The most common invasive species were Xanthium italicum, Xanthium spinosum, Elaeagnus angustifolia, L. draba, Euphorbia cyparissias, and Verbascum phlomoides, which dramatically decrease ecosystem productivity. Here we present results obtained based on field test-plant relationship phytophagy between L. draba L. and P. wrasei Leonardi and Arnold. We studied plants of the Brasicaceae family: L. draba, L. crenatum, Armoracia rusticana, and Barbarea orthoceras. Test plots comprised four L. draba planted 5 cm apart, with two test plants (L. draba, L. crenatum, B. orthoceras, or A. rusticana) planted at one of three planting distances (30 cm, 15 cm, and 5 cm) on each side of the central plants. Each planting distance variant was repeated four times, and for each variant all observations were made on 16 central L. draba plants and 8 of each test plant: L. draba, L. crenatum, B. orthoceras and A. rusticana. A total of 144 plants was studied: 48 central L. draba plants and 96 of each test species. These results do not contradict previous evidence that oligophagous species P. wrasei controls the L. draba. P. wrasei is also a potential biologic control agent for B. orthoceras (American yellowrocket), which is native to North America, including much of Canada and the western United States, as well as parts of Asia.
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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) | 0.000 | 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 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".