Garlic in a fruit tree's bulb ring deters trunk borers.
Contested A person looked and found no study that tests it. The planner leaves it to you.
The evidence
Evidence: no study has tested it directly, so nothing settles it either way.
Plants it applies to
How this rule has changed
Every change is dated, newest first. The full record, with each reason, is in the data download.
- Added to the rules
Cite this page
Milpa Gardens. "Garlic in a fruit tree's bulb ring deters trunk borers." Evidence grade: Contested. https://milpa.garden/rules/garlic-fruit-tree-s-bulb-ring-deters/
A garden planner built on graded evidence. Every claim states its evidence grade and links its sources on the page. Cite it with the grade, and add the date you read it.
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How we grade evidence
- Well established
- The rule names its mechanism and is settled, by sources a person has read and checked or by plain arithmetic and geometry.
- Promising
- The mechanism is named and the literature backs it. A few questions are still open.
- A good hunch
- Plausible by its mechanism, but field studies are thin, so treat it as a lean.
- Contested
- The evidence points both ways, or no study has tested it, so the planner does not enforce it.
- Refuted
- The claim did not survive its sources. It is kept so the folklore can be answered.