<i><scp>D</scp>reyfusia nordmannianae</i> in <scp>N</scp>orthern and <scp>C</scp>entral <scp>E</scp>urope: potential for biological control and comments on its taxonomy
Bibliographic record
Abstract
Abstract The silver fir woolly adelgid, D reyfusia nordmannianae , is the most severe pest occurring on A bies nordmanniana in C entral and N orthern E urope. The adelgid is particularly damaging to trees in C hristmas tree plantations. D reyfusia nordmannianae is native to the C aucasus region and alien to E urope, where its natural enemy complex is less diverse compared to its area of origin. Mitochondrial and nuclear DNA sequence data from the samples of D . nordmannianae collected in its native range and E urope and from the samples of D reyfusia piceae and D reyfusia prelli collected in E urope and N orth A merica were examined for phylogenetic structure. There was no evidence of differentiation, suggesting that these D reyfusia species have recently diverged or require taxonomic revision. All existing published and unpublished reports on natural enemies of D . nordmannianae in its place of origin were reviewed, with the purpose of selecting agents for classical biological control in E urope. The literature review suggested that the most promising agent was the C hamaemyiidae fly, L eucopis hennigrata . A new survey in D . nordmannianae 's area of origin – T urkey, G eorgia and R ussia – showed that L . hennigrata was present in all localities. It was particularly abundant in Turkey, where its impact on populations of D . nordmannianae appears to be high. Its use as a biological control agent is discussed, as well as other biological control strategies.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".