Insecticides
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• 
Safety - page 25 • First aid - page 33 • Resistance management - page 41
Phostoxin
Group 8B
Formulation
Product
Company
Active ingredient
Formulation
Container size
Phostoxin Tablets* (PCP# 15736)
Gardex Chemicals
Ltd.
Aluminum Phosphide 55% Fumigants
1
kg
Phostoxin Pellets** (PCP# 15735)
Phostoxin Sache*** (PCP# 16438)
*
Tables (3 g) release 1.0 g phosphine upon decomposition. **Pellets (0.6 g) release 0.2 g phosphine upon decomposition.
***
Sachet : (34 g) release 11.0 g phosphine upon decomposition
Note
:
Order directly – Gardex Chemicals Ltd.: 1-800-804-3633 (British Columbia location).
Insects Controlled
Angoumois grain moth
bean weevil
cadelle
cigarette beetle
dermestids
dried fruit moth
flour beetles
granary weevils
Indian meal moth
khapra beetle
lesser grain borer
Mediterranean flour moth
rusty grain beetle
saw-toothed grain beetle
Rates
Crop
Tablets
Raw agricultural commodities, animal feeds and processed foods
4 - 6/
m
3
Commodity temperature °C
Exposure times (days)
Over 20
3
16 - 20
4
12 - 15
5
5 - 11
10
Below 5
Do not fumigate
Note: Suggested exposures should be observed. A shortened exposure period cannot be compensated for by increased dosage.
Application Tips
General
:
Never fumigate alone. Never fumigate any structure occupied by human or animals or physically adjoining
another structure occupied by human or animals. Personnel involved in fumigation must leave the structure within 2
hours of starting fumigation. Person supervising must be a licensed fumigator, and personnel assisting must be
trained and appropriately licensed in the use of aluminum phosphide.
Fumigating grain storage units
:
Make sure the structure is tight enough to retain the fumigant. Seal the structure as
necessary. During fumigation, leave all doors, vents, etc. open to create cross-ventilation in the structure. Tablets may
be probed into grain or fed into the grain stream as the grain is transferred from one bin to another. Probing requires a
pipe 3 cm in diameter and long enough to reach within 1.5 m of the bottom of the storage unit. Probes are made in a
1.5
m horizontal grid across the grain surface. Fumigant tablets are dropped down the pipe at 15 cm intervals as the
pipe is withdrawn from the grain. The objective is to distribute the tablets as evenly as possible throughout the grain
mass. To achieve the proper dosage when treating a stream, apply the tablets uniformly to the grain stream based on
flow rate. After application, all openings should be sealed and entries locked and placarded. After the exposure
period, open doors and windows for aeration. Remove all warning placards when aeration is complete.
How it Works
Phosphine (hydrogen phosphide) is a colourless gas with a carbide-like odour and high volatility. Formulated product
consists of aluminium phosphide, ammonium bicarbonate, urea and paraffin. Upon exposure to air, the ammonium