Effects of plant nutrition on the expression of abdominal discoloration in <i>Phytoseiulus persimilis</i> (Acari: Phytoseiidae)
Bibliographic record
Abstract
Abstract The effect of plant nutrition on the expression of abdominal discoloration in Phytoseiulus persimilis Athias-Henriot was investigated. Phytoseiulus persimilis were fed spider mites, Tetranychus urticae Koch (Acari: Tetranychidae), that were reared on bean, Phaseolus vulgaris L. (Fabaceae), plants treated with distilled water or one of three concentrations of 20–20–20 fertilizer (0.6, 2.4, and 3.8 g/L). Symptoms observed in P. persimilis included white stripes along the sides of the body in the region of the Malpighian tubules, white coloration of the rectum, or a combination of these symptoms. The proportion of observations of white symptoms in P. persimilis increased in an asymptotic curvilinear fashion as fertilizer concentration increased. There was no significant difference in life-history characteristics of P. persimilis from the four treatments, including total fecundity, mean daily oviposition, oviposition period, post-oviposition period, or adult survival. Peak oviposition for mites from all treatments (4.9 eggs per female per day) occurred 2–3 days following mating. Thereafter, mean fecundity was greater than 4 eggs per female per day until day 11, and greater than 3 eggs per female per day until day 15, followed by a sharp decline. Following death, individual mites were examined for microsporidia, but none were detected. Results suggest that the expression of white abdominal discoloration in P. persimilis is related, at least in part, to plant nutrition; symptoms are an expression of normal excretory function in P. persimilis; and white abdominal discoloration does not necessarily affect predator performance.
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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".