AgroBest Phozguard 620 Systemic Fungicide – 5L
4 reviews|9 answered questions
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AgroBest

AgroBest Phozguard 620 Systemic Fungicide – 5L

4 reviews|9 answered questions

$99.90

SKU: AGBE018

SKU: AGBE018

  • Systemic protection against Phytophthora & Downy Mildew: moves through the plant for complete internal defence.
  • Boosts natural plant immunity: High-strength 620g/L phosphorous acid stimulates resistance to disease.
  • Ideal for turf, crops & ornamentals: Versatile, easy-to-mix liquid for preventative and curative use.
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Description

AgroBest Phozguard 620 Systemic Fungicide – 5L

AgroBest Phozguard 620 Systemic Fungicide – 5L is the best foliar and root disease protection for the prevention and control of Downy Mildew and other Phytophthora diseases. This liquid systemic fungicide combines mono and dipotassium Phosphonates for maximum prevention and control of Down Mildew and Phytophthora diseases!

Key Features

  • Provides effective control on a wide range of crops
  • Formulated from a non-toxic potassium phosphite base.
  • All diseased parts of the plant are effectively controlled using a systemic action providing complete translocation through their vascular system.
  • Compatibility with a wide range of other agricultural chemicals, reducing the number of spray applications needed.
  • AgroBest has the highest concentration, which reduces the product quantity required and saves on packaging requirements, saving you time and money!

Target Disease

Crop Type / Examples Diseases Controlled
Vegetables (e.g. cucurbits, onions, potatoes) Downy mildew, root rots, Phytophthora, Pythium
Fruits (e.g. citrus, grapes, avocados) Root rot, downy mildew, collar rot, Phytophthora
Ornamentals & Nursery Plants Foliar blights, root diseases, Pythium, Phytophthora

How to Use

  1. Apply at the right time: Use as a preventative spray before disease appears, or at the first sign of infection.

  2. Adjust the rate as the canopy grows: Start with 1.9 L/ha for small canopies early in the season, increasing to 2.6–3.9 L/ha for larger canopies. Always check the label for your specific crop.

  3. Ensure thorough coverage: Spray all plant surfaces, including the undersides of leaves, for full protection.

  4. Mix properly: Follow the label’s dilution rates to avoid over-application and maximise results.

  5. Choose ideal conditions: Spray in cool, calm weather for best absorption and minimal evaporation.

  6. Tank mix if needed: Phozguard 620 is compatible with many other fungicides like mancozeb, so you can broaden your disease control in one go.

  7. Monitor regularly: Keep an eye on your plants for disease symptoms and reapply as needed.

Pro Tip: For the best long-term results, use Phozguard 620 as part of an integrated disease management plan. Combine it with good soil health, proper irrigation, and crop rotation for healthier, more resilient plants.

Ingredients

The ingredient of AgroBest Phozguard 620 Systemic Fungicide – 5L is:

  • 620 g/L Phosphorous Acid

Guides

Product Label

Specifications

Brand AgroBest
Product Name Phozguard 620 Systemic Fungicide
Active Ingredient 620 g/L Phosphorous (Phosphonic) Acid as Mono- and Di-Potassium Phosphonate
Product Form Liquid concentrate
Suitable For Vegetables, fruits, ornamentals
Application Method Foliar spray or soil drench as directed
Disease Protection Foliar and root disease protection

Precautions

  • Keep out of reach of children and pets.

  • Avoid spraying near waterways, drains, and sewers.

  • Wear gloves, protective clothing, and eye protection when mixing and spraying.

  • Store AgroBest Phozguard 620 Systemic Fungicide – 5L in a cool, dry place away from sunlight.

  • Dispose of empty containers responsibly.

FAQ

Can I use AgroBest Phozguard 620 Systemic Fungicide – 5L on both leaves and roots?

Yes, AgroBest Phozguard 620 Systemic Fungicide – 5L provides systemic protection for both leaves and roots, making it highly effective against a wide variety of plant diseases. It moves through the plant’s vascular system to protect new growth from infection. This dual action makes it ideal for integrated disease management across multiple crop types.

Is this foliar and root disease protection safe to mix with other fungicides?

Absolutely. It’s commonly tank-mixed with protectant fungicides like mancozeb for broader disease control. Just make sure to always check the product label for compatibility, and conduct a small jar test if you’re unsure about any new tank mix combination.

How often should I apply Phozguard 620?

Apply this foliar and root disease protection preventatively or at the first sign of disease to stop pathogens before they spread. Regular monitoring of crop health is key, and you should reapply according to the timing and rates specified on the label. This ensures consistent protection and maximises the effectiveness of your disease control program.

Protect your plants from the inside out with AgroBest Phozguard 620 – systemic control for longer-lasting defence.

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Q & A

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Would this be effective against fire blight on photinia’s and stone fruits? Heidi asked on 18 April 2025

Hey Heidi,
AgroBest Phozguard 620 Systemic Fungicide is not effective against fire blight on photinia or stone fruits. Its primary use is for controlling diseases caused by Phytophthora species and downy mildew, not fire blight.

 Carl answered on 22 April 2025 store manager
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Is Phozguard 620 effective against Seiridium Canker in cypress pines? Stephen asked on 26 March 2025

Hey Stephen,
AgroBest Phozguard 620, a systemic fungicide with active ingredients of phosphorous acid (mono- and di-potassium phosphonates), is effective against a range of fungal diseases, including those caused by Phytophthora and Downy Mildew. While it is not specifically marketed for Seiridium canker in cypress pines, fungicides containing phosphorous acid have shown good results in managing cypress canker when applied early.

Cypress canker, caused by Seiridium species, interferes with the sap-conducting system of trees and leads to branch dieback and eventual tree death. Treatments using phosphorous acid-based fungicides, either as foliar sprays, injections, or soil drenches, have been reported to suppress the disease and improve tree health. Therefore, Phozguard 620 could potentially be effective against Seiridium canker when applied correctly. However, consulting a local arborist or horticulturist for tailored advice is recommended.

 Carl answered on 27 March 2025 store manager
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Is this safe to use on orchids? Colin asked on 10 February 2025

Hey Colin,
AgroBest Phozguard 620 Systemic Fungicide is not specifically labeled for use on orchids. It is primarily used for controlling diseases like Downy Mildew and Phytophthora in crops such as citrus, grapes, and cucurbits. While systemic fungicides can be effective for treating fungal infections in plants, using a product not specifically labeled for orchids may pose risks to the plant.

 Carl answered on 11 February 2025 store manager

This should be okay to use on most orchids (excluding those requiring an alkaline pH, such as Cym. canaliculatum) as it is the same active ingredient as Rid-a-Rot, just a higher concentration (Rid-a-Rot is 200g/L). So where you'd use 5 to 10ml of Rid-a-Rot per litre of water, you'd use 1.6 to 3.2mL of Phozguard 620.

 Joshua answered on 20 February 2025
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does it treat frangipani rust Ella asked on 24 July 2024

Hey Ella,
While not specifically marketed for frangipani rust, the systemic properties of AgroBest Phozguard 620 and its ability to enhance the plant's immune response make it a potentially useful option for treating this disease. Always follow the manufacturer's instructions and consider consulting with a local horticulturist for tailored advice​

 Carl answered on 25 July 2024 store manager
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Hi Dave will Phozguard treat Antracnose in Plane Tress Hayley Crossing asked on 18 June 2024

Hey Hayley,
AgroBest Phozguard 620 Systemic Fungicide is a liquid fungicide designed for the prevention and control of various fungal diseases, including Downy Mildew and Phytophthora. It works systemically by being absorbed into the plant's vascular system, providing effective disease control by activating the plant's immune response and suppressing spore formation.

However, the available information does not explicitly state that Phozguard 620 is effective against anthracnose, particularly for plane trees (Platanus spp.), which are commonly affected by the fungus Apiognomonia veneta. Anthracnose in plane trees is typically managed through cultural practices like improving air circulation and sunlight penetration, removing and disposing of infected leaves, and ensuring proper tree health through adequate watering and fertilization.

For chemical control, fungicides specifically labeled for anthracnose, such as those containing thiophanate-methyl, chlorothalonil, or mancozeb, are recommended. Phozguard 620 might help as part of an integrated disease management approach, but it is essential to consult specific product guidelines or a local extension service for confirmation and tailored advice.

 Carl answered on 21 June 2024 store manager
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4 reviews for AgroBest Phozguard 620 Systemic Fungicide – 5L

4.5
Based on 4 reviews
5 star
75
75%
4 star
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3 star
25
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1-4 of 4 reviews
  1. Joshua
    Reviewer

    Safe and moderately effective at controlling Phytophthora in Cymbidium orchids. I have previously used Rid-a-Rot and never had any ill effects from applying this at the prescribed rate (although I rarely apply it to Cym. canaliculatum as that species requires an alkaline environment and this product is acidic). It does not completely stop Phytophthora if it has gotten into a plant, but since resuming regular applications this year the problem has been significantly reduced with fewer new cases. Worth having on hand if you have rot issues.

    (0) (0)
  2. Kiet H.
    Verified owner
    (0) (0)
  3. Ken Wynn
    Verified owner
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  4. Richard Skitt
    Verified owner

    I bought the phosguard 600 for use with my private orchid collection. The directions for use were a little unclear for me as to mixing ratios for folia spraying and possibly drenching the pots with a diluted solution. If you could clarify this I would be grateful. Thanks Richard

    (6) (0)
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