Fungicides – Foliar Treatment
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Phostrol
Fungicide Group 33
Formulation
Product
Company
Active ingredient
Formulation
Container Size
Phostrol (PCP# 30449)
Engage Agro Corporation Mono- and dibasic sodium, potassium,
and ammonium phosphites: 53.6%
Liquid
10
L, 1000 L
Crops, Diseases Controlled, Rates and Timing
Crops
Diseases
Rate per acre
Staging and specific comments
Potato
Suppression of pink rot
(
Phytophthora erythroseptica
)
2.3 - 4.7
L
In furrow application. Apply at planting in a band
directly over the seed prior to row closure.
Late blight (
Phytophthora
infestans
)
1.2 - 4.7
L
Foliar application. Begin applications when conditions
favouring disease development are present and repeat
on a 7 - 14 day interval. Use the higher application rate
and shorter application interval when disease pressure
is moderate to high.
Suppression of pink rot
(
Phytophthora erythroseptica
)
2.3 - 4.7
L
Late blight
(
Phytophthora infestans
)
0.42
L in 2 L water to
1
tonne potato tubers
Post-harvest control: Directly apply to tubers and
ensure complete and even coverage.
Pink rot (
Phytophthora
erythroseptica
)
Registered Tank Mixes
In furrow
:
Pink rot - Ridomil Gold 480SL.
Foliar
:
Pink rot - Ridomil Gold MZ 68WP Water Soluble Bag, Ridomil Gold MZ 68WG, Ridomil Gold Bravo Twin
Pack.
Foliar
:
Late blight - Bravo 500, Bravo ZN, Echo 720, Echo 90DF, Ridomil Gold Bravo Twin Pack, Dithane F-45,
Dithane DG 75, Dithane DG Rainshield NT, Manzate Pro-Stick, Gavel 75DF, Penncozeb 75 DF.
Application Information
How to Apply
:
Ground and aerial application.
Water Volume
:
Ground: 80 L/acre. Aerial: 20 L/acre.
Restrictions
Maximum number of applications
:
Do not exceed 7 foliar applications per year.
Grazing
:
Do not graze treated fields or feed treated forage or hay to livestock.
Pre-harvest interval
:
Can be applied up to the day of harvest.
Re-entry
:
Do not enter treated areas for 12 hours.
Re-cropping
:
No restrictions listed.
Environmental Precautions
Do not use to treat aquatic pests. Do not contaminate irrigation or drinking water supplies or aquatic habitats by
cleaning of equipment or disposal of wastes.
Runoff
:
To reduce runoff from treated areas into aquatic habitats, avoid application to areas with a moderate to steep
slope, compacted soil or clay. Avoid application when heavy rain is forecast.
Toxicity
Ingestion:
Acute oral LD
50
(
rats) >5,000 mg/kg.
Dermal:
Acute dermal LD
50
(
rats) >5,000 mg/kg.