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Hand-out 12 - Control of the GGB by chemical means

1) Actellic Super (A.S.) is the only GGB control insecticide available in Kenya.

2) The chemical is more effective when shelled maize is dusted.

3) The dusting of maize, containers, - e.g. gunny bags, stores, shops, drying areas and vehicles transporting maize - with A.S. is now compulsory in GGB - infested areas. Defying persons will be prosecuted.

4) When handling chemicals, pay attention to the following points:

* Wash with water and soap the hands and any other part of the body which may have come into contact with the chemical.

* Keep A.S. and other chemicals under lock and key.

5) When dusting surfaces and maize, make use of tables 1 and 2 attached.

Table 1 - APPROXIMATE QUANTITIES OF A.S. REQUIRED TO DUST SURFACE AREA

Item

Approximate Surface Area (m2)

Manufacturer's Specification (gms)

Reasonable Approximation (teaspoons)

1 section crib

12.44

311

31

2 sections crib

24.88

622

62

Granary

10.012

250

25

Drum

2.03

50.75

6

Gunny bag

0.66

16.43

2

NB:

Although "teaspoon" is mentioned as a measurement for simplicity's sake, the trainer should insist that other tools are used for dusting maize and different containers as there are:

- bottle tops, content: 5 gms
- match box, content: 25 gms
- shoe polish tin, content: 50 gms.

For example, if a granary has to be treated with 250 gms of A.S., which is equal to 25 teaspoons, 10 matchboxes of A.S. can be used instead. One 90 kg bag should be treated with 2 matchboxes or 1 shoe polish tin of A.S. The use of any instrument, tool or container used for food preparation should be discouraged.

Table 2 - APPROXIMATE QUANTITIES OF A.S. REQUIRED TO DUST GIVEN QUANTITIES OF MAIZE

MANUFACTURERS' SPECIFICATIONS

REASONABLE APPROXIMATIONS

Weight of Maize

Amount of A.S.

Quantity of Maize

Amount of A.S.

90 kg.

50 gms.

1 full bag

5 teaspoons

18 kg.

10 gms.

1 debe

1 teaspoon

36 kg.

20 gms.

2 debes

2 teaspoons

54 kg.

30 gms.

3 debes

3 teaspoons

72 kg.

40 gms.

4 debes

4 teaspoons

90 kg.

50 gms.

5 debes

5 teaspoons

200 kg.

111 gms.

1 drum

12 teaspoons


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