Ferimzone フェリムゾン
Fungicides for rice blast and other rice diseases: Used against rice blast, sheath blight and other rice diseases (some stop melanin synthesis, some strengthen the rice plant's own resistance).
In Japan
- Registration
- Registered as a pesticide (first registered February 20, 1991). 38 formulated products contain it.
- Main registered crops
- rice (paddy), Japanese lawn grass, Western lawn grass and others (3 crop names in the registered uses)
- Toxicity class
- Active ingredient: Ordinary substanceClasses of the 38 formulated products (diluted products sold): ordinary substance 38Classes under Japan's Poisonous and Deleterious Substances Control Act.
- ADI (acceptable daily intake)
- 0.019 mg per kg of body weight per day
- ARfD (acute reference dose)
- 0.3 mg per kg of body weight
- Evaluation
- Food Safety Commission of Japan, October 30, 2024
- Note
- In the DB's xlsx file, the ARfD column was misaligned (showing “SF:100”), so the values were corrected using the “Summary of evaluation results” on the evaluation detail page of 2024-10-30 (ADI 0.019, ARfD 0.3). https://www.fsc.go.jp/fsciis/evaluationDocument/show/kya20231025171 The evaluation of 2026-02-25 falls under Article 11, paragraph 1, item 2 of the Food Safety Basic Act (no ADI or ARfD stated). The values are those in the DB.
ADI: the amount considered to have no effect on health even if eaten every day for a lifetime. ARfD: the amount considered to have no effect on health when eaten at one time (within 24 hours). Both are set by the Food Safety Commission of Japan, mainly from animal studies.
In Japan's national residue testing (fiscal 2024)
| Produce | Detected / tested | Detection rate | Over the limit |
|---|---|---|---|
| Domestic | 14 / 1,576 | 0.9% | 0 |
| Imported | 0 / 258 | 0.0% | 0 |
Found in domestic foods: tomato, rice (brown rice) (max. 0.4 ppm)
Tests are counted as pesticide × sample. Any detection counts as “detected” — it does not mean the limit was exceeded. For pesticides outside the top 20, figures are summed from the food-by-food tables of the full report.
Evaluations abroad
- WHO acute toxicity class
- II (Moderately hazardous), LD50 725 mg/kgBased on the toxicity of the undiluted active ingredient given once, mainly to rats by mouth (LD50 = the dose that kills half; the smaller, the stronger the acute toxicity). It is not an assessment of the safety of residues in food.
- EU
- Not in the EU database
- IARC (carcinogenicity)
- No matching entry in the IARC list (not evaluated or out of scope, including Group 3)
Related explainers
Sources
- FAMIC (Food and Agricultural Materials Inspection Center), pesticide registration information (as of Sept. 30, 2026) (Japanese)
- Food Safety Commission of Japan, risk assessment report on Ferimzone (October 30, 2024) (Japanese)
- MHLW, results of pesticide residue testing in foods, fiscal 2024 (Japanese)
- Consumer Affairs Agency, daily intake survey of pesticide residues in foods, fiscal 2024 (Japanese)
- WHO Recommended Classification of Pesticides by Hazard 2019
- EU Pesticides Database
Last checked 2026-10-01. Registrations and evaluations change over time. This page is a translation of our Japanese page; if they differ, the Japanese page is the reference.