Plant bed treatment with 1,3-dichloropropene for Meloidogyne hapla control in carrots grown in organic soil
Bibliographic record
Abstract
The efficacy of plant bed treatment with the fumigant 1,3-dichloropropene (1,3-D) to control Meloidogyne hapla and improve carrot yields was determined in an organic soil under commercial field conditions. The soil was treated with 1,3-D at 56 and 112 L ha -1 either mixed with a rototiller in a 15-cm width band over the row or injected 20 cm deep with a single shank behind the rototiller at a rate of 56 L ha -1 . The single injection treatment at the 56 L ha -1 rate provided the best nematode control with the lowest galling indices and the highest yield of marketable carrot roots (66.7 t ha -1 vs. 5 t ha -1 for untreated control). The mixed application method was less effective than the soil injection method, even at twice the rate. In a second field trial, the fumigant was injected at 40 L ha -1 rate through a single shank at 20 cm deep. Soil treatment suppressed galling and significantly increased the number of marketable carrot roots (68.71 ha -1 vs. 11.81 ha -1 control). Plant bed treatment with 1,3-D is an effective alternative to traditional broadcast treatment for control of root-knot nematodes in carrot production on organic soil.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| 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 teacher head, 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".