Systemic fungicide with protective activity, translocated throughout the plant by both xylem and phloem. Effectively controls phytophthora diseases and downy mildew in various situations
| Phos Phyt 400 | |
|---|---|
Target |
Phytophthora root rot & collar rot |
Product Type |
Fungicide |
Active Ingredient |
400g/L Phosphorous acid as potassium phosphite |
Group |
33 |
Pack Size |
1L, 2.5L, 5L, 20L |
APVMA Registration # |
66081
Search APVMA number at APVMA PubCRIS. |
First marketed in 1989. Induction of host plant defence possibly resulting in inhibition of spore germination or by blocking development of mycelium and sporulation.
Acute oral Mammalian Toxicity (LD50, mg/kg) rats > 5000
| Crop & Situation | Disease | State | Rate | Critical Comments |
|---|---|---|---|---|
| Avocado | Phytophthora Root Rot | QLD, NSW, VIC, SA, WA |
Trunk injection — skeletal trees: 1st year: 7.5mL undiluted product per metre of canopy diameter Other situations: 3.75mL of product diluted with 7.5mL water per metre of canopy diameter Foliar spray: 5–6 L/ha |
Inject trees at spring flush maturity; repeat treatment in February or March. Drill holes 5mm in diameter and 25–50mm deep, with slight downhill angle in the trunk. Syringes should be placed in the main trunk of the tree and spaced evenly around the circumference. Suitable for use with injectors, Ag-muri gun or hydraulic tree injection. Do not prune back trees before injection as burning of new growth may occur. Do not inject trees in winter months. Do not cut back the canopy of injected trees. Do not add any material other than water to Phos Phyt 400 Systemic Fungicide for tree injection. Do not inject more liquid in a lesser number of syringes than directed. Solution concentrate: 2.5–3mL/L Amount per unit: Spray to run off — 7.5 to 10 L per adult tree. 1. Curative: apply every 3 weeks until disease is under control. 2. Preventative: apply every 5–6 weeks. |
| Young or Small Citrus | Phytophthora Root & Collar Rot | All States | 2.5–5mL to leaf wetness by boom or similar high volume sprayer |
Two applications: 1. Late winter prior to flowering. 2. Autumn applied to mature fruit. Repeat applications annually to maintain protection. Removal of fruit from affected plant will assist recovery depending on conditions at time of application. Use a suitable wetter in conjunction with Phos Phyt 400 Systemic Fungicide. |
Mature Citrus
|
Phytophthora Root & Collar Rot | All States |
High disease incidence / poor drainage: 20 L/ha in 3000–4000 L of water 75mL/12 L — tree Low Phytophthora pressure / well drained: 12.5 L/ha in 2000–5000 L of water 50mL/12 L — tree |
For effective control apply as a protectant before above ground symptoms of decline and collar rot become evident. Spray trees for even coverage. Do not apply under high temperatures (above 35°C) particularly if humidity is low or to moisture stressed trees. Warning: Young container grown mandarin trees may develop leaf burn and growth restriction following foliar application or soil drench at a rate recommended for established trees. |
| Subterranean Clover | Phytophthora Root Rot | NSW, VIC, TAS, SA, WA | 750mL/ha |
Apply 8–9 days after first irrigation but before second irrigation. Apply in Autumn when subterranean clover is at the cotyledon to unifoliate leaf growth stage. Withholding Period: DO NOT graze or feed livestock for 14 days after treatment. |
| Grapes | Downy Mildew | All States | 300mL/100 L of water 3 L/ha |
It is essential that the rate of Phos Phyt 400 Systemic Fungicide is adjusted to the vine-row volume (i.e. the volume of vine foliage per hectare). Spray timing is critical. For best results, apply as a tank mix with protectant fungicides such as Mancozeb, Copper Oxychloride etc. to ensure both pre and post infection activity. Apply at times of high disease risk, especially between the time that conditions are conducive to downy mildew infection and the appearance of oil spots. Ensure spray coverage is adequate and that the appropriate rate is applied to match vine growth, particularly from midseason onwards. Note: Apply as close as possible to the day of infection and alternate with other systemic fungicides. DO NOT apply after growth stage E-L 33. |
| Ornamentals | Phytophthora Root & Collar Rot | All States except SA |
2.5mL/L — boom or knapsack 5mL/L — airblast |
Apply at 4–6 weekly intervals when conditions favour disease development. To avoid phytotoxicity with some plant species, it is recommended that the product be tested on a few plants of each species prior to main application. |
| Pineapple | Phytophthora Root Rot | QLD & WA | 6 L/ha in 1200–1500 L of water | Apply to tops 2 weeks prior to harvest of planting material. |
| Cucurbits | Downy Mildew | All States | 3 L/ha in minimum 800–1000 L of water |
Use weekly spray intervals when conditions favour disease development. To avoid phytotoxicity with some plant species, it is recommended that the product be tested on a few plants of each species prior to the main application. |
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Apply Phos Phyt 400 Systemic Fungicide by foliar spray, trunk injection or boom application following the Application Guide above. Always download and read the current product label before use and follow all regulatory and safety instructions. Withholding Period:
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Phos Phyt 400 can be applied by foliar spray, boom spray, airblast, knapsack or trunk injection depending on the crop and situation. Application methods, rates and timing vary by crop — refer to the Application Guide on this page for full details.
Always download and read the current product label before use. This product is not to be used for any purpose or in any manner contrary to the label unless authorised under appropriate legislation.
Store in the closed, original container in a cool, well-ventilated area. Do not store for prolonged periods in direct sunlight.
Triple rinse containers before disposal and add rinsings to the spray tank. Do not dispose of undiluted chemicals on site. If recycling, replace the cap and return clean containers to a recycler or designated collection point. If not recycling, break, crush or puncture and deliver empty packaging to an approved waste management facility. If an approved waste management facility is not available, bury the empty packaging 500mm below the surface in a disposal pit specifically marked and set up for this purpose, clear of waterways, desirable vegetation and tree roots, in compliance with relevant local, state or territory government regulations. Do not burn empty containers or product.
