BIVOLTINE RACE AND

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Avoid feeding of soiled, diseased, dusty and over mature leaves.
Remove the undersized and all suspected diseased worms carefully to avoid further
contamination. Collect them into 270 formalin or lime solution followed by burying or
burning. With the occurrence of viral disease (NPV), change the base paper and dust
R.K.O" on the new sheet and allow worms to stay there with leaf to reduce further
contamination and spread of disease.
Subject undersized worms to microscopic examination for pebrine disease.
Do not throw the rejected or diseased larvae here and there under any circumstances.
Pick out such larvae by using old news paper or unusbd leaf ancl burn them.
Distribute the larvae uniformly in the bed during every feeding.
Use paraffin paper (with small holes) to cover the worms during late age rearing in
summer months one hour after each feeding to prevent the driage of leaf. Remove the
paraffin paper again one hour earlier to next feeding.
Feed soft leaves for about 3 -4 feedings after IV moult in summer and gradually switch
over to medium leaf followed by hard leaves for two days prior to spirtning.
Thble 6. Amount of leaf required daity in late age rearing of 100 dfls (40,000 larvae)
Instar Day Leaf requirement (kg)
TII 1
w
V
2
3
4
1
2
3
4
1
2
3
4
I
6
7
8
8.0
15.0
18.0
4.0
45.0
10.0
45.0
70.0
75.0
200.0
20.0
,90'o
110.0
180.0
200.0
250.0
260.0
140.0
1240.0
15