Pyrimethanil 40% SC: High-Efficiency Fungicide for Crop Disease Control

Pyrimethanil 40% SC (Suspension Concentrate) is a systemic fungicide belonging to the anilinopyrimidine class, designed for effective control of fungal diseases such as botrytis (gray mold), powdery mildew, and sclerotinia in a wide range of crops. The formulation contains 400 grams of active ingredient pyrimethanil per liter, offering excellent suspension stability and uniform coverage for reliable disease management.

Active Ingredient & Formulation

Chemical Name: Pyrimethanil (CAS No. 53174-05-1)

Chemical Class: Anilinopyrimidine

Molecular Formula: C₁₂H₁₃N₃O

Formulation Type: 40% SC (Suspension Concentrate)

Physical Properties: Off-white flowable suspension, pH 5.5–7.5, density 1.05–1.10 g/cm³, compatible with water for dilution.

Mode of Action

Systemic Uptake:

- Absorbed by leaves, stems, and roots, translocated throughout the plant via xylem and phloem.

Biochemical Inhibition:

- Blocks methionine biosynthesis in fungi by inhibiting adenosine triphosphate (ATP) synthase, disrupting spore germination and mycelial growth.

Disease Suppression:

- Prevents infection at early stages and suppresses lesion expansion in established infections.

Target Crops & Diseases

Crop	Controlled Diseases
Grapes	Botrytis cinerea (gray mold), powdery mildew
Tomatoes	Gray mold, early blight
Strawberries	Botrytis fruit rot, sclerotinia
Apples/Peaches	Scab, powdery mildew, gray mold
Cereals	Fusarium head blight, septoria tritici

Dosage & Application Guide

Crop	Dosage (g ai/ha)	Application Timing	Method & Tips
Grapes	200–300 (500–750 mL 40% SC)	Pre-bloom, bloom, and post-bloom stages	Spray with 300–500 L water/ha; repeat every 7–10 days during high humidity.
Tomatoes	150–250 (375–625 mL 40% SC)	Transplanting stage and fruit set	Apply at 10–14 day intervals; cover both foliage and soil around roots.
Strawberries	180–280 (450–700 mL 40% SC)	Pre-flowering and fruiting stages	Dilute in 200–300 L water/ha; focus on crown and fruit zones.
Apples	250–350 (625–875 mL 40% SC)	Green tip to petal fall, post-harvest dip	Post-harvest dip: 500–1000 mg/L solution for 1–2 minutes.

Key Features

Broad-Spectrum Fungus Control:

- Effective against 20+ fungal diseases, including botrytis, powdery mildew, and sclerotinia.

Systemic & Protective Action:

- Translocates within plants to protect new growth; provides 7–14 days of residual protection.

Crop Safety:

- Safe for use in sensitive crops like grapes and strawberries when applied as directed.

Residue Management:

- Short soil half-life (7–14 days) allows flexible crop rotation; low MRLs compliant with global standards.

Cost-Effective:

- Low application rates (150–350 g ai/ha) reduce input costs while maintaining high efficacy.

Safety & Environmental Notes

Toxicity:

- Low mammalian toxicity (LD₅₀ > 2000 mg/kg rat); moderate risk to fish (LC₅₀ 1–10 mg/L).

Environmental Precautions:

- Maintain 30 m buffer from water bodies; avoid spraying on windy days to prevent drift.

Crop Rotation:

- Wait 2–3 months before planting cruciferous crops (e.g., cabbage, broccoli).

Storage:

Store at 5–30°C, away from food/feed; keep containers sealed to prevent drying.

Packaging & Compliance

Standard Packs: 1L, 5L, 20L COEX containers with UV-protective labels.

Regulatory Status:

- Registered in EU, USA (EPA), China, and major fruit/vegetable producing regions.

Shelf Life: 3 years under recommended storage conditions.

Compatibility & Tank Mixes

Common Combinations:

- With mancozeb for enhanced broad-spectrum disease control in tomatoes

- With tebuconazole for powdery mildew and rust management in cereals

Adjuvants:

- Use non-ionic surfactants (0.2% v/v) to improve foliar adhesion in dry conditions.

FAQ

What diseases does Pyrimethanil 40% SC control?

Mainly gray mold (botrytis), powdery mildew, sclerotinia, and early blight in crops.

Can it be used in organic farming?

No, it is a synthetic fungicide; organic alternatives include copper-based products.

What is the pre-harvest interval (PHI)?

- Grapes: 14 days

- Tomatoes: 7 days

- Strawberries: 5 days

How to manage resistance in botrytis?

Rotate with fungicides from different groups (e.g., strobilurins, dicarboximides).

Is Pyrimethanil safe for bees?

Low toxicity to bees (LD₅₀ > 100 μg/bee), but avoid spraying during flowering.

Field Performance Data

Grape Vineyards in Europe:

250 g ai/ha reduced botrytis infection by 85%, improving grape quality and yield by 12%.

Tomato Farms in North America:

200 g ai/ha + mancozeb controlled early blight and gray mold, increasing marketable fruit by 15%.

Residue Limits

Crop	MRL (mg/kg)	Regulatory Region
Grapes	0.5	EU, Codex Alimentarius
Tomatoes	0.2	EPA, China
Strawberries	0.1	Japan, Korea

For detailed technical data sheets or custom formulation inquiries, contact our agricultural specialists for region-specific recommendations.

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