---
title: "Phosfusion 600 | Fungicide"
canonical: https://fernland.com.au/phosfusion-600-fungicide/
summary: "Systemic phosphite fungicide for control of Downy Mildew and Phytophthora, improving plant defence and vigour across a range of crops."
type: product
---

# Phosfusion 600 | Fungicide

> Systemic phosphite fungicide for control of Downy Mildew and Phytophthora, improving plant defence and vigour across a range of crops.

Categories: [Fungicides](https://fernland.com.au/chemicals-plant-protection/fungicides/)

| Option | SKU | Price (ex GST) |
| --- | --- | --- |
| Phosfusion 600 | Fungicide | PHOSFUS-20 | $313.64 |

## Description

## Phosfusion 600

### Protect Crops from Downy Mildew and Phytophthora with Systemic Defence and Vigour Enhancement

Downy Mildew and Phytophthora can severely impact crop health and yield by attacking roots, stems, and foliage. **Phosfusion 600** provides a systemic solution—combining **phosphorous (as phosphite)** and **potassium**—to help crops fight disease, stimulate natural defence mechanisms, and improve overall plant vigour.

This concentrated, **non-toxic potassium phosphite formulation** is rapidly absorbed and translocated throughout the plant, delivering protection to all tissues and ensuring long-lasting effectiveness across a wide range of crops and ornamental species.

### Key Features and Specifications

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**Systemic protection** against *Downy Mildew* and *Phytophthora spp.*

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**Formulated with potassium phosphite**, providing safe and effective disease suppression

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**Complete plant translocation**, ensuring total coverage of all plant parts

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**Highly concentrated (600 g/L phosphorous acid as mono and di-potassium phosphonate)** for reduced application volumes

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**Free-flowing, off-white clear liquid** for easy measuring and mixing

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**Compatible with a wide range of agricultural chemicals**, minimising spray applications

### Application and Usage Instructions

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**Mixing:**

Half-fill the spray tank with clean water.

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Add the required amount of **Phosfusion 600**, then agitate thoroughly.

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Fill the tank with the remaining water and maintain agitation during spraying.

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Reseal containers immediately after use.

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**Compatibility:**

Compatible with most agricultural products.

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Always perform a **jar test** and small-scale spray before general use.

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Contact your retailer for updated compatibility information.

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**Best Practice:**

Avoid spraying during extreme conditions (over 28°C, frost, or high humidity).

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Use at least the labelled dilution rate to prevent leaf burn.

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Conduct **soil and leaf tests** regularly to monitor nutrient levels.

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When applying for the first time, test on a small area before broad application.

### Why Choose Phosfusion 600

Phosfusion 600 offers dual benefits of **disease suppression** and **nutritional support**, making it an efficient choice for professional growers aiming to maintain healthy, resilient crops under Australian conditions. Its high concentration, ease of use, and proven compatibility streamline operations while improving plant health and yield potential.

## Specifications

- **Suitable For:**  Protected Cropping +  Landscape +  Nursery
- **Formulation:** Liquid
- **Active Ingredient:** 600 g/L Phosphorous (Phosphonic) Acid As Mono-Di K Phosphonate
- **Poison schedule:** S5
- **Registration status:** Registered (APVMA 67596)

## Documents

- [Label - Phosfusion 600 Fungicide - 251107](https://fernland.com.au/documents/50/)
- [Tech Note - Phosfusion 600 Fungicide - 251107](https://fernland.com.au/documents/1070/)