Boscalid 50% WDG – Systemic Fungicide for Broad-Spectrum Disease Control

Boscalid 50% WDG is a highly effective systemic fungicide formulated as a Water-Dispersible Granule (WDG). It belongs to the carboxamide (SDHI) class and is widely used to protect fruits, vegetables, oilseeds, and ornamental crops from a broad range of fungal diseases including powdery mildew, botrytis, sclerotinia, and alternaria. Boscalid provides long-lasting residual protection, strong translaminar movement, and excellent compatibility in integrated disease management programs.

Active Ingredient
Boscalid 50% (Water Dispersible Granule)

CAS Number
188425-85-6

Mode of Action
Boscalid inhibits the mitochondrial complex II enzyme (succinate dehydrogenase), disrupting energy production in fungal cells. This unique mode of action leads to the suppression of fungal growth and reproduction, providing both preventive and early curative effects.

Chemical Group
SDHI (Succinate Dehydrogenase Inhibitor)

Target Crops
Grapes, apples, pears, tomatoes, lettuce, soybeans, strawberries, cabbage, ornamental flowers, and other vegetables.

Controlled Diseases
Gray mold (Botrytis cinerea), powdery mildew, alternaria leaf spot, early blight, sclerotinia stem rot, white mold, downy mildew, and more.

Recommended Application and Dosage

Crop	Target Disease	Dosage	Application Timing
Grapes	Powdery mildew, Botrytis	300–500 g/ha	Apply before flowering and during fruit set
Tomatoes	Early blight, powdery mildew	400–600 g/ha	Apply at first signs of disease
Lettuce	Sclerotinia, downy mildew	300–500 g/ha	Apply preventively or when risk is high
Soybeans	Sclerotinia stem rot	500 g/ha	Apply before flowering or early symptoms
Apples/Pears	Alternaria, powdery mildew	350–500 g/ha	Begin at petal fall and repeat as needed

Use 400–600 L of water per hectare for optimal spray coverage. Apply with ground sprayers equipped with hollow-cone or flat-fan nozzles. Ensure uniform coverage and avoid runoff.

Benefits of Boscalid 50% WDG

Broad-spectrum protection against fungal pathogens
Preventive and early curative activity
Systemic and translaminar movement for internal plant protection
Long residual effect (up to 14 days depending on weather)
Compatible with tank-mix partners for integrated disease management
Supports resistance management programs

Packaging Options

100g / 250g / 500g / 1kg aluminum foil pouches
5kg / 10kg / 25kg fiber drums or cartons
Customized packaging available for OEM/private label orders

OEM & ODM Services
Shengmao provides comprehensive OEM support including customized labeling, branding, formulation adjustment, multilingual packaging (English, Russian, Spanish, Arabic, etc.), and low MOQ support for new market entry.

Safety Precautions

Avoid inhalation of dust or spray mist
Use protective gloves, clothing, goggles, and masks during handling
Do not eat, drink, or smoke while handling the product
Wash hands thoroughly after application
Store in a cool, dry, and well-ventilated area away from direct sunlight

Environmental Information
Boscalid is moderately toxic to aquatic organisms. Avoid contamination of water sources. Do not apply during heavy rain or when runoff is likely. Triple-rinse empty containers and dispose of them according to local environmental regulations.

Frequently Asked Questions (FAQ)

Q1: What is the main function of Boscalid 50% WDG?
A: Boscalid is a systemic fungicide that prevents and controls a wide range of fungal diseases by inhibiting mitochondrial respiration in fungal cells.

Q2: Can Boscalid be used in combination with other fungicides?
A: Yes, Boscalid can be tank-mixed with fungicides like azoxystrobin, pyraclostrobin, mancozeb, or chlorothalonil for broader disease control. A jar test is recommended before mixing.

Q3: Is Boscalid effective on resistant strains?
A: Boscalid, as an SDHI (Group 7), is valuable in resistance management. It is particularly effective against fungal strains resistant to other fungicide groups like Qoi (Group 11) and DMI (Group 3).

Q4: How often should I apply Boscalid?
A: The spray interval is typically 7–14 days, depending on disease pressure and environmental conditions.

Q5: What is the pre-harvest interval (PHI) for Boscalid?
A: PHI varies by crop but is generally around 7–14 days. Always refer to the local product label for precise PHI information.

Q6: Is Boscalid rainfast?
A: Yes, Boscalid has good rainfastness once dried on the leaf surface (usually within 2–4 hours after spraying).

Q7: Does Boscalid pose a risk to beneficial insects?
A: Boscalid has low toxicity to most beneficial insects and pollinators when applied according to label directions. Avoid spraying during peak bee activity.

Q8: What is the shelf life of Boscalid 50% WDG?
A: When stored properly in a sealed, original container in a cool and dry place, the shelf life is typically 2 years or more.