Pyraclostrobin ピラクロストロビン
Strobilurins (QoI): Stop the respiration of fungi (the mitochondrial electron transport chain). Developed from a component of mushrooms.
In Japan
- Registration
- Registered as a pesticide (first registered September 25, 2006). 8 formulated products contain it.
- Main registered crops
- Western lawn grass, apple, kabocha pumpkin, napa cabbage, chrysanthemum, Japanese lawn grass and others (42 crop names in the registered uses)
- Toxicity class
- Active ingredient: Deleterious (ordinary at 6.8% or less)Classes of the 8 formulated products (diluted products sold): deleterious substance 4, ordinary substance 4Classes under Japan's Poisonous and Deleterious Substances Control Act.
- ADI (acceptable daily intake)
- 0.034 mg per kg of body weight per day
- ARfD (acute reference dose)
- 0.05 mg per kg of body weight
- Evaluation
- Food Safety Commission of Japan, January 22, 2026
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 | 30 / 2,700 | 1.1% | 0 |
| ImportedNo. 6 by detection rate | 321 / 4,333 | 7.4% | 3 |
Found in domestic foods: strawberry, persimmon, other nightshade (Solanaceae) vegetables, eggplant, napa cabbage, grape, apple, asparagus, cabbage, tomato, broccoli, lettuce (including butterhead and chisha lettuce) and others (max. 0.25 ppm)
Found in imported foods: strawberry, cherry (including cherries), other nightshade (Solanaceae) vegetables, other Liliaceae vegetables, other herbs, carrot, Welsh onion (including leek), grape, orange (including navel orange), grapefruit, tomato, banana and others (max. 4.5 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
- Not listed in the WHO 2019 tablesBased 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
- Approved in the EU (approval expires September 2041)EU ADI: 0.03 mg/kg bw/day; ARfD: 0.03 mg/kg bw
- 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 Pyraclostrobin (January 22, 2026) (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)
- EU Pesticides Database (Pyraclostrobin)
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.