Fungicide PYRACLOSTROBIN 12.8% + BOSCALID 25.2% - ASTRA BOSS 38WG

Fungicide PYRACLOSTROBIN 12.8% + BOSCALID 25.2% - ASTRA BOSS 38WG

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FUNGICIDE – PYRACLOSTROBIN 12.8% + BOSCALID 25.2%

Dual-action solution – Rapid fungus control – Long-lasting disease protection – Promotes strong, green foliage

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1. How to use Pyraclostrobin 12.8% + Boscalid 25.2%

Crop Disease Timing of Spray Instructions
Rice Leaf blast – Neck blast, unfilled grains, premature yellowing Spray at the early onset of disease - Water volume: 400–600 L/ha
- Spray evenly on both upper and lower leaf surfaces
- Apply in cool hours (early morning or late afternoon)
- Pre-harvest interval: 7 days
Vegetables Downy mildew, powdery mildew, damping-off, leaf spot Spray when disease spots first appear Spray evenly over the canopy; repeat after 5–7 days if disease pressure is high
Fruit trees Anthracnose, leaf spots, bacterial-fungal lesions, rust, scab Spray when disease incidence <10% Increase water volume to ensure even coverage of the canopy
Industrial crops (pepper, coffee, rubber) Anthracnose, rust, brown spot, pink fungus Spray at early onset of disease Spray evenly across the canopy, paying attention to the underside of leaves
Ornamental plants, flowers Powdery mildew, leaf spots, rust Spray upon first detection of symptoms Repeat after 5–7 days

2. Detailed information – PYRACLOSTROBIN 12.8% + BOSCALID 25.2%

  • Ingredients: Pyraclostrobin 12.8% + Boscalid 25.2%

  • Chemical group: Next-generation fungicide

  • Formulation: WG (Wettable Granule) – water-dispersible granules

  • Mode of action: Contact – systemic – translaminar

  • Key properties:

    • Strong tissue penetration

    • Inhibits fungal development from spore germination stage

    • Long-lasting efficacy

    • Non-phytotoxic

    • Promotes leaf greening, thickening, and fast recovery after disease

Active ingredients:

  • Pyraclostrobin

    • Belongs to the Strobilurin group

    • Inhibits fungal mitochondrial respiration (Qo site)

    • Blocks spore germination and infection

    • Helps plants remain green, increase resistance, and recover quickly

  • Boscalid

    • Belongs to the SDHI (Succinate Dehydrogenase Inhibitor) group

    • Inhibits fungal respiration at the mycelium growth stage

    • Highly effective against difficult-to-control and resistant fungi

    • Long-lasting and stable activity

The combination of Pyraclostrobin + Boscalid provides stronger, faster, and more durable control than using single active ingredients.

3. Key benefits – PYRACLOSTROBIN 12.8% + BOSCALID 25.2%

  • Specializes in controlling common fungal diseases:

    • Rice blast – leaf and neck blast

    • Powdery mildew

    • Downy mildew

    • Anthracnose

    • Rust

    • Ring spot, leaf spot

    • Scab

    • Unfilled rice grains

    • Damping-off fungi

  • Effective against resistant fungi

    • Dual mode of action kills fungi, including strains resistant to triazoles or mancozeb

  • Rapid plant recovery – greener leaves – thicker foliage

    • Pyraclostrobin promotes mild growth stimulation:

      • Enhances photosynthesis

      • Boosts plant resistance

      • Accelerates recovery after disease

  • Deep penetration – stable active ingredients – rainfast

    • Maintains efficacy even if it rains 1–2 hours after spraying

4. Mode of action – Pyraclostrobin + Boscalid

  • Pyraclostrobin (QoI):

    • Inhibits the Qo site in fungal mitochondrial respiration

    • Stops energy production in fungal cells

    • Fungi lose infective ability → die

  • Boscalid (SDHI):

    • Blocks the succinate dehydrogenase enzyme

    • Prevents energy metabolism in mitochondria

    • Fungi cannot grow → die completely

Dual mechanism → kills at the source – blocks spread – prolongs effectiveness

5. Product images

Safety Precautions When Using Insecticides

  • Keep out of reach of children.

  • Do NOT eat, drink, or smoke while handling the product; do not store the product together with food or beverages.

  • When handling the pesticide:


    Avoid inhalation and prevent contact with eyes, nose, and skin.


    Wear appropriate personal protective equipment (PPE) such as protective clothing, gloves, mask, and safety goggles.

FOR TECHNICAL SUPPORT, PLEASE CONTACT

Thuan Thanh Phat Investment & Technology Joint Stock Company


HOTLINE: 0822.610.555


Address: Lot A22.1B, D7 Street, Thanh Thanh Cong Industrial Park, Trang Bang, Tay Ninh Province


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