Description
Mode of action
Fenarimol is a systemic fungicide belonging to the pyrimidine chemical class, known for its strong preventive and curative properties.
The primary mechanism of action involves the inhibition of ergosterol biosynthesis, which is essential for the fungal cell membrane structure.
By interfering with the metabolic pathways of the fungi, fenarimol effectively stops the development of mycelium and the formation of spores.
The compound exhibits systemic movement within the plant, providing protection to both existing and new growth shortly after application.
Its translaminar properties ensure that the fungicide redistributes across the leaf surface, which increases the efficacy of the treatment.
What it targets
The fungicide is primarily targeted at controlling various powdery mildew species across different agricultural and horticultural crops.
It is widely used in orchards to control apple and pear scab, preventing fungal damage to foliage and developing fruit clusters.
Fenarimol is highly effective in vineyards for managing powdery mildew (Oidium), protecting vines throughout the growing season.
It is also commonly applied in greenhouse vegetable production to protect cucurbits and other sensitive crops from fungal pathogens.
The compound is effective against a broad spectrum of Ascomycetes and Basidiomycetes that cause significant yield loss in farming.
Rates and timing
The application rates for fenarimol depend on the specific crop, the intensity of disease pressure, and regional environmental conditions.
Treatments should ideally begin at the early stages of disease development to maximize the curative effect and prevent major outbreaks.
The intervals between applications typically range from 10 to 14 days, though they may be adjusted based on monitoring data and weather forecasts.
Mixing the preparation requires careful adherence to manufacturer guidelines to ensure the correct concentration of the active ingredient.
Proper spray coverage is essential for the systemic compound to be absorbed efficiently by the plant tissues across all parts of the crop.
Restrictions
To prevent the development of fungicide resistance in fungal populations, it is recommended to alternate fenarimol with products having different modes of action.
Users must wear appropriate personal protective equipment during handling and application to prevent skin, eye, or respiratory exposure.
Environmental precautions must be strictly followed, as the compound can be hazardous to aquatic organisms if allowed to enter water bodies.
Always adhere to the pre-harvest interval (PHI) specified on the product label to ensure that residues in the final produce remain within safe limits.
Storage should be conducted in secure, labeled containers in a cool, dry area away from food, feed, and access by unauthorized individuals.
Status in the European Union
Not approved in the EU
- CAS number
- 60168-88-9
- Category (EU)
- FU - Fungicide
- ADI
- 0.01 mg/kg bw/day
- ARfD
- 0.02 mg/kg bw
EU status is for reference only and does not replace national registration in your country.