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Dakfosal®, TB

Aluminium phosphide 570 g/kg

Secured storage!

Fumigant insecticide for desinsection in various empty storages, and food, seed and fodder grain stocks in storages and elevator bins that are stored in bulk or bags under a film cover.

General information


  • high fumigant activity;
  • exterminates storage pests in hard-to-reach places;
  • exterminates insect pests of any age;
  • no effect of product quality;
  • easy to use.

Preparative form

Tablets containing aluminum phosphide 570 g/kg.

Transport and storage conditions

Comply with all conventional rules of toxic substance transport. Keep the preparation in a room dedicated for pesticide storage. Storage temperature range - minus 20⁰C to plus 35⁰C.

Shelf life

3 years.

Hazard class

Hazard class 1, extreme hazard. Preparation of limited usage. Hazardous in inhaled and swallowed. Comply with safety regulations of SanPiN 1.2.1077-01. All works shall be performed by special teams of specialists in corresponding disciplines permitted to work with phosphine generating substances.


0.3 kg, 1 kg flask


Schyolkovo Agrokhim JSC, Russia.


Schyolkovo Agrokhim JSC, Russia.


Mechanism of action

As a result of chemical reaction of aluminum phosphide with atmospheric moisture, the Dakfosal tablet emits phosphine gas, which, when penetrating the organism of insect pests, impairs reduction-oxidation systems, inhibits the respiratory activity, disturbs metabolism and blocks oxygen intake, thus causing death of insects. Toxic effect on insects increases with temperature and slows down sharply at a temperature of max. 15⁰C.

Protective period

Protective period lapses after complete phosphine liberation from the preparation.

Speed of action

Speed of action is dependent on gas concentration, ambient temperature (above 15⁰C), pest species and insects life stage.

Spectrum of action

Grain weevil, mealworm, saw-tooth grain beetle, corn moth, meal moth, drugstore beetle, coffee bruchid weevil, cigarette beetle, mites and other species of storage insect pests.


Should not be used with other insecticides. Phosphine action may become stronger amid elevated content of carbon dioxide.


Cases of insect resistance to phosphine have been recorded. Resistant populations are exterminated by increasing the exposure time.

Usage regulations

Crop / object of treatment

Harmful object

Consumption rate (preparation/mix)

Method, time and conditions of application. Application time for manual (machinery assisted) operations

Wait time (application frequency)

Empty grain storages

Storage insect pests

5 g/m³

Fumigation at ambient temperature above 15⁰C. Exposure period – 5 days. Access of humans and storage loading  after complete ventilation and at phosphine concentration in working air not greater than MPC -(-)


Food, seed and fodder grain stored  in bulk, elevator bins and in bags under film cover

Insects and mites – storage pests

9 g/t

Fumigation at grain temperature above 15⁰C. Exposure period – 5 days for insects and 9 days for mites. Concentration per exposure time factor (CET) – 25 g.h/m3 for insects and 450 g.h/m3 for mites. Degas – min. 10 days. Implementation at residual phosphine content not greater than MPL. Access of humans after complete ventilation and at phosphine concentration in working air not greater than MPC. -(-)

Application technique
Calculate the required number of tablets before use. When possible, use packing (flask, container) contents for one operation. Perform fumigation at above 15⁰C.
For fumigation of elevators and grain storages.
Add tablets into the grain flow in a short and fast manner at equal interval as grain is loaded into the bin. Grain is loaded into the bin via a belt conveyer. Tablets may be introduced into the bin using a chute. Add tablet using mechanical equipment (automatic dispenser) or manually with rubber gloves on.
The elevator bin shall be filled as soon as possible.
For fumigation of crops in bags.
Place tables uniformly among bags and around bag piles.
Piles shall be gas-tight and covered with plastic sheets.
Empty grain storages.
Close rooms tightly before fumigation. Place tablets all over the room.
Phosphine has no adverse effect on seed germinating capacity of various plant species, when the recommended fumigation conditions and technique are used.

Preparation of limited usage. Diluted phosphine concentrations in air on outdoor sites are harmful for the environment. Phosphine oxidizes in plants and preparations store to phosphoric acid. In animal organisms, it metabolizes to non-toxic phosphates.
Access of humans after complete ventilation (not earlier than on 11th day after degassing started).

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