Azoxystrobin 4.8% + Chlorothalonil 40% SC

About Azoxystrobin 4.8% + Chlorothalonil 40% SC

Azoxystrobin 4.8% + Chlorothalonil 40% SC is a powerful, broad-spectrum combination fungicide widely used in agriculture. By blending a systemic ingredient with a contact protectant, it offers comprehensive dual-action defense against major fungal diseases while significantly reducing the risk of the fungi developing resistance.

Here is a comprehensive breakdown of how it works, its target applications, and proper usage guidelines.

Mode of Action: How It Works

This formulation packs a dual punch by attacking fungal pathogens in two entirely different ways:

• Azoxystrobin (4.8%) Systemic Action: As a strobilurin fungicide, it is absorbed by the plant tissues and moves systemically. It works by inhibiting mitochondrial respiration (specifically blocking Complex III), cutting off the energy production of the fungal cells. This prevents spore germination and halts the growth of fungal mycelium from the inside out.

• Chlorothalonil (40%) Contact Action: This is a multi-site protectant that stays on the plant surface. It interferes with multiple metabolic pathways within the fungal cells, making it incredibly difficult for the fungus to adapt or build immunity. It acts as a protective shield, stopping new fungal spores from establishing on the plant.

Primary Uses and Target Crops

This specific SC (Suspension Concentrate) formulation is highly effective against major foliar diseases, particularly in cucurbits and cruciferous vegetables.

Dosage & Application Guidelines

To achieve maximum efficacy, it is best applied as a preventative treatment or at the very first sign of initial disease symptoms.

• Standard Dosage:

  • Per Acre: Generally recommended at 600 ml to 1,200 ml per acre (depending on crop type and disease severity).

  • Per Liter: Approximately 3 ml per liter of water for localized knapsack spraying.

• Water Volume: Typically mixed in 200 to 500 liters of water per hectare to ensure thorough, uniform coverage of the foliage.

• Application Method: Foliar spray using a tractor-mounted or knapsack sprayer fitted with a hollow cone nozzle.

• Frequency: If disease pressure remains high, a follow-up spray can be done 1015 days later. However, do not exceed 3 applications per crop season to manage resistance and residue.

• Waiting Period (Pre-Harvest Interval): Wait 3 to 5 days after the final spray before harvesting the crops.

Key Benefits

• Knockdown + Residual Protection: The contact element stops external spores instantly, while the systemic element provides long-lasting, weather-resistant protection from within.

• Anti-Resistance Strategy: Combining a single-site systemic fungicide (Azoxystrobin) with a multi-site contact fungicide (Chlorothalonil) prevents fungal populations from mutating and building resistance.

• Yield & Quality Boost: It helps preserve the green leaf area (enhancing photosynthesis), which leads to healthier crops and optimal market yield.

Safety and Environmental Precautions

Important Environmental Note: This formulation is highly toxic to fish and aquatic organisms. Avoid spraying near aquaculture ponds, lakes, drainage systems, or open waterways. Do not allow spray drift to reach these areas.

• Personal Protection: Always wear chemical-resistant gloves, protective goggles, long sleeves, and a mask when mixing and spraying. Avoid inhaling vapors or letting the product touch your skin or eyes.

• Handling: Use a dedicated stick to stir the solutionnever use cooking utensils. Do not eat, drink, or smoke while handling the product.

• First Aid: In case of accidental skin or eye contact, flush immediately with plenty of clean water for at least 15 minutes and seek medical attention if irritation persists.