Exploring the weed biology of two potentially novel oilseed crops: <i>Euphorbia lagascae</i> and <i>Centrapalus pauciflorus</i>
Bibliographic record
Abstract
Euphorbia lagascae and Centrapalus pauciflorus are natural sources of the plasticizer vernolic acid, and are therefore being considered as potentially new industrial oilseed crops in Canada. Both species show a propensity to grow in undisturbed and unfavourable conditions in their native regions of southern Europe and Africa. Trials were conducted in Ontario between 2013 and 2014 to better understand the biology of these species. The ability of these species to establish, leave a seedbank, and compete with a crop was explored. C. pauciflorus emergence in cultivated seedbeds (5.14%–12.15%) was higher than in mowed (0.99%–1.87%) and undisturbed grass (0.00%–0.25%) in spring 2014. E. lagascae also emerged at higher rates in cultivated seedbeds (3.07%–4.98%) than mowed (0.88%–1.99%) or undisturbed grass (0.22%–1.00%) in spring 2014, however emergence was higher in mowed grass (6.25%) than seedbeds (4.00%) in fall 2014. The low persistence of seeds in the soil (93%–100% seeds were nonviable) and poor ability to establish a seedbank limit their potential as weeds. Plants that established in unmanaged areas did not produce viable seeds and are therefore unlikely to become weeds. Even though their competitive ability is similar to that of redroot pigweed on a plant per plant basis, they are unlikely to achieve the high densities and persistence of pigweed infestation and are unlikely to threaten farms as weeds.
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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 | 0.001 | 0.001 |
| 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 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 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".