Rotation crop effects on <i>Pratylenchus penetrans</i> and subsequent crop yields
Bibliographic record
Abstract
Root damage from Pratylenchus penetrans causes economic losses in many crops. Rotation with poor or non-hosts is a control method that can reduce the use of fumigant nematicides. Short-term experiments were conducted to identify potential non-host sorghum and millet hybrids. In a field experiment, forage pearl millet (Pennisetum glaucum L. 'CFPM 101'), grain pearl millet ('CGPMH-1'), grain sorghum (Sorghum bicolor L. 'CGSH-7') and rye (Secale cereale L. common) were grown in rotation with tobacco (Nicotiana tabacum L. 'Delfield'), a known intolerant host. One rye treatment was fumigated prior to tobacco planting in 1998. P. penetrans numbers were lower in forage and grain pearl millet plots than in grain sorghum or rye plots in the year of planting. In the subsequent tobacco crop year, root nematode counts in plots where forage and grain pearl millet were grown were similar to counts in fumigated rye plots and lower than counts in plots where non-fumigated rye and grain sorghum were grown. Tobacco leaf yield was negatively correlated with soil nematode counts from November 1997 to July 1998 (r = −0.48, P = 0.0001), as well as with root counts from July 1998 to September 1998 (r = −0.40, P = 0.0015). This is the first report of P. penetrans suppression by P. glaucum in the field. Further investigation of nematode suppression by pearl millet lines and development of this potentially sustainable farming system is warranted. Key words: Pratylenchus penetrans, Pennisetum glaucum, Secale cereale, Sorghum bicolor, biological control, cropping system
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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".