Boscalid ボスカリド
SDHI: Stop another step of fungal respiration (succinate dehydrogenase).
In Japan
- Registration
- Registered as a pesticide (first registered January 17, 2005). 6 formulated products contain it.
- Main registered crops
- Western lawn grass, citrus, large-berried grapes, strawberry, tomato, cherry tomato and others (55 crop names in the registered uses)
- Toxicity class
- Active ingredient: Ordinary substanceClasses of the 6 formulated products (diluted products sold): ordinary substance 6Classes under Japan's Poisonous and Deleterious Substances Control Act.
- ADI (acceptable daily intake)
- 0.044 mg per kg of body weight per day
- ARfD (acute reference dose)
- 3 mg per kg of body weight
- Evaluation
- Food Safety Commission of Japan, December 24, 2025
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 |
|---|---|---|---|
| DomesticNo. 7 by detection rate | 136 / 3,457 | 3.9% | 0 |
| ImportedNo. 9 by detection rate | 260 / 4,442 | 5.8% | 1 |
Found in domestic foods: strawberry, cherry (including cherries), persimmon, turnip roots, kabocha pumpkin (including squash), cucumber (including gherkin), burdock root, other nightshade (Solanaceae) vegetables, other herbs, eggplant, carrot, Welsh onion (including leek) and others (max. 1.7 ppm)
Found in imported foods: strawberry, cherry (including cherries), other nightshade (Solanaceae) vegetables, other Liliaceae vegetables, other vegetables, carrot, Welsh onion (including leek), grape, avocado, banana, bell pepper, blackberry and others (max. 1.3 ppm)
Tests are counted as pesticide × sample. Any detection counts as “detected” — it does not mean the limit was exceeded.
Evaluations abroad
- WHO acute toxicity class
- U (Unlikely to present acute hazard in normal use), LD50 >5000 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
- Approved in the EU (approval expires March 2028)EU ADI: 0.04 mg/kg bw/day; ARfD: —
- 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 Boscalid (December 24, 2025) (Japanese)
- MHLW, results of pesticide residue testing in foods, fiscal 2024 (Japanese)
- WHO Recommended Classification of Pesticides by Hazard 2019
- EU Pesticides Database (Boscalid (formerly nicobifen))
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.