Estimating the effect of poplar resistance on the performance of the woolly poplar aphid, <i>Phloeomyzus passerinii</i>, in various experimental conditions
Bibliographic record
Abstract
The woolly poplar aphid, Phloeomyzus passerinii (Signoret) (Sternorrhyncha: Aphididae), causes the most damage to poplars in southern Europe and the Near East as outbreaks can lead to massive mortality in mature stands. Previous studies, conducted on poplar cuttings or young trees, showed that resistance varied depending on the poplar genotype. However, these results did not indicate how aphid populations were affected by tree resistance and were only partially confirmed by field observations. This study investigated the effect on aphid settlement and performance of poplar genotypes belonging to Populus × canadensis Moench, Populus × interamericana Brockh., Populus nigra L., Populus deltoides Bartram ex Marshall, and Populus trichocarpa Torr. & A. Gray ex Hook. using a single aphid clone. The study was conducted under three experimental conditions: (i) unrooted cuttings, (ii) potted cuttings, and (iii) mature trees. The aphid settlement rate, the larval development rate, and the fecundity were affected by the poplar genotype, highlighting the antixenotic and antibiotic properties involved in tree resistance to P. passerinii. The laboratory results for aphid performance and settlement rate on unrooted cuttings were transposable to both potted cuttings and mature trees. Laboratory studies could, therefore, provide useful information for identifying the parameters involved in resistance mechanisms.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 | 0.001 |
| 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".