BIVOLTINE RACE AND

2.3. Estimation of quantity to disinfect the unit area
Before disinfection, one r;rust find out the surface area of the rearing room to be disinfected
and prepare the required quantity of formalin to cover the area" The total area of a rectangular
room is caiculated as hereunder
1. Floor area : Length x tsreadth
2. Areaof two walls : Length x Height of each wall x 2
3. Area of two other walls = tsreadth x Fleight of each wall x2
4. Roof / terrace areL = I-ength x Breadth
Add up all these to get the area to be disinfected. One iitre ci € rmalin solution(2-3%) is
required to disinfect the surface area of 3m x 3rn (9 sq.m$. Thus, a room size of 3m x 3m x
3m requires 6 littes of formalin solution (400 m1/m2 surface area or 2.4litre /m2 fioor area).
This is just sufficient to disinfect the ernpty room without any equiprnents. An additional quantity
of 1-Zlitres is required to disinfect the rearing eriuipment kept in such a room.
Thble 1., Requirennent of bleachingyg:T
1.
z.
+.
Rearing
House
Closed type with
Closed type rvith
Open type with
Open type with
2.4. Fumigation
mud floor
cement/stone floor
mud floor
cement/stCI::e
Bleaching
Powder (kg)
#44
3"27fr
7.966
6.896
Slaked
Lime (kg)
36.993
15.123
36.ffio
14.764
Fumigation is effeciive in air tight rearing house and when the temperature is higher than
Z3"C andunder wet conditions. The fumigation in gaseous form is rnore effective"
trn general, formalin {'f{]fo}is used for fumigation (80 mvmz} concentrated or diluted 4 to 5
times. Heat the formalin sotrution kept in a pan to liberate the forrnalin gas. Keep the pan
containing formalin on a lighted charcoal stove filned with sufficient .quantity of fuei (charcoal)
to evaporate all the formalin" Close the rearing house f.ar 24 hours. Later, open all the doors and
windows of the rearing house for free circulation of fresh air before brushing"
2.5. F'bmigation wieh paraforrmalelehyeie
Paraformaldehyde(a poiyrner of formaldehyde) is a white powde.r, with a stright odour of
formaldehyde. When heated, it activates an