Bivoltine Cluster Promotion Programme

The Central Silk Board has envisaged an ambitious plan to produce 5000 mt import substitute BV silk through organization of clusters across the country in co-ordination with DoT (Seri.)/ DOS of the respective states in a mission mode approach during XII plan period.

CSB in association with DoS of various states has introduced the concept of Cluster Promotion Programme with an ambitious plan of producing Bivoltine raw silk. The Institute administered 8 mega clusters through it’s nested units in 8 Eastern and North Eastern states (West Bengal-2; Assam & Nagaland-2; Manipur-2; one each in Mizoram & Tripura). Accordingly, group of villages were selected by each of the Cluster Development Facilitator (CDF) based on the potentiality of the area for practicing bivoltine sericulture. Various improved technologies were introduced in the cluster villages and were managed and supervised directly by the scientists jointly with the DoS counterpart, especially with the co-operation and participation of farmers. Under each of these clusters’ farmers were facilitated for bivoltine technology adoption with an effective Research-Extension-Farmer linkage. As a result, the cocoon productivity levels in the cluster area and and thereby the income has increased at farmer’s level.

Performance of clusters: The 08 Mega clusters of Eastern & North Eastern zone have produced 956.63 MT of cocoons and recorded 110.34 MT (53.30%) of raw silk production (BV: 55.72 MT & ICB: 54.64 MT) against the target of 207 MT; which was 35.69 MT less as compared to the previous year (2020-21), which may be attributable to COVID-19 pandemic situation. During 2021-22, a total of 22.20 Lakh dfls (BV: 10.10 & ICB: 12.10) were reared against the target of 34.30 Lakh dfls (BV: 26.30 & ICB: 8.00) with an achievement of 76.21%. The graphical representation of performance of clusters in the last nine years is incidated in the figure.

Silkworm hybrids distributed under CPP in E & NE zone (2021-22)

State / Mega Cluster

Bivoltine

ICB

West Bengal (Malda & Murshidabad)

  • SK6×SK7  / BHP-DH / TT21xTT56
  • 12YxBFC1 / N×(SK6×SK7)

Assam & Nagaland (Assam-Lower & Assam-Upper)

  • SK-hybrids / Double hybrids

 

Manipur (Plain & Hill)

  • FC1×FC2 /C×J /CSR2×CSR4
  • SK-hybrids

 

Mizoram (Aizawl)

  • SK-hybrids / J112
  • N×J112

Tripura
(West)

  • FC1×FC2 /SK-hybrids
  • 12YxBFC1/ PM×FC2
  • M6DPC×(SK6×SK7)/ N×(SK6×SK7)

 

Improved Cross Breed (ICB) performance under CPP in East & North East Zone (2021-22)

Mega Cluster

Dfls (Lakh)

Cocoon
Production(MT)

Yield/100 dfls (kg)

Raw Silk (MT)

Target

Ach.

Target

Ach.

% Ach.

West Bengal

Malda

4

6.1105

253.927

41.56

16

25.393

158.71

Murshidabad

4

4.103

189.305

46.14

16

20.859

130.37

Tripura

West Tripura

--

1.880

74.558

39.66

--

08.386

--

Total/Avg.

8.00

12.094

517.79

42.81

32.0

54.638

170.74

 

Bivoltine hybrids’  performance of under CPP in East & North East zone(2021-22)

Mega Cluster

Dfls (Lakh)

Cocoon
Production
(MT)

Yield/
100 dfls
(kg)

Raw Silk (MT)

Tar.

Ach.

Tar.

Ach.

% Ach.

West Bengal

Malda

3.5

1.149

54.325

47.28

28.4

7.754

27.32

Murshidabad

3.25

1.201

65.508

54.54

26.6

9.347

35.14

Manipur

Manipur-Plain

2.75

1.670

61.69

49.35

17.50

7.65

43.71

Manipur-Hill

2.75

1.250

60.98

48.78

17.50

7.55

43.14

Assam & Nagaland

 Assam-Lower

4.5

1.945

71.661

44.24

30.0

8.71

29.03

 Assam-Upper

4.25

0.564

13.279

23.54

24.0

1.644

6.85

Mizoram

Aizawl

2.80

2.3

110.4

48.0

16.0

12.98

81.13

Tripura

West Tripura

2.50

0.02

0.994

49.7

15.0

0.117

0.78

Total/Avg

26.3

10.100

438.837

43.45

175.0

55.752

31.86