BIVOLTINE RACE AND

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Fig.14 Multiend reeling 6nshine, Fig.15 Deflossing of cocoons 27
- Testing of breedslhybrids under stress conditions (high temperature, disease tolerance and poor quality of leaf) should be enforced by special breeds having tolerance. - RSRS's, REC's and TSC's should conduct adaptability test with relard to authorised hybrids and identify suitable hybrids for respective climatic conditions and they should give guidelines while popularising the selected hybrids at farmers level. 7.1. Investigation method - - - - - - Befofe authorisation, the identified hybrids are to be subjected for testing at RSRS/REC/ BSF of main Institute. In each centre 10 dfls are to be reared. 10 Dfls of control hybrids should also be reared along with new combinations. Approximately 4000 silkworm larvae should be brushed (each hybrid) and after III moult 2500lawae should be retained. After harvest, calculate the survival rate. 100 female and 100 male cocoons taken at random for calculhtion of average cocoon weight,.cocoon shell weight and cocoon shell ratio. From the remaining cocoons select reelable cocoons ar-,J subject them for test reeling results (CSTRI, Bangalore or other test reeling centres) by reeling with automatic or multiend reeling machine (Fig.1a). - The rearing and reelingdatashould be collected and compiled by the main Institute. - Subject the consolidaled data to silkworm race authorisation committee for discussion. - Out of the testing places selected half of the centres should test straight crosses (A X B) 'and other half of the testing centres should test reciprocal hybrids (B X A ). 7.2. Proforma for collection of hybrid data Rearing test 1. Experiment/test No. 2. Name of the breed/hybrid 3. Mother strain ( Dumbbell or oval ) 4. Egg (hibernated, non-hibernated, immediately acid treated and acid treated after chilling) 5. Incubation : No. of days of cold stored, cold stored at blue egg or hatched larvae. 6. Date of brushing : 7. Rearing method : Shelflshoot 28
Page 2 and 3: MANUAL ON BIVOLTINE REARING RACE MA
Page 4 and 5: PREFACB Sericulture, the aiable agr
Page 6 and 7: 5.5. Silkworrn diseases and prevent
Page 8 and 9: INTRODUCTION The bivoltine silkworm
Page 10 and 11: 2.3. Estimation of quantity to disi
Page 12 and 13: Figs. L to 2. Disinfection 3 to 4.
Page 14 and 15: During incubation, hurnidity is rna
Page 16 and 17: 4.1. Hygiienic conditions - - - - -
Page 18 and 19: Thc irrrportant technical aspects f
Page 20 and 21: The standard practice is to give 3-
Page 22 and 23: - - - - - - - Avoid feeding of soil
Page 24 and 25: - - - - - Make the rearing house fl
Page 26 and 27: - - - - - - - - - - - - - - Arrange
Page 28 and 29: INFLUENCE OF TEMPERATURE ON PUPATIO
Page 30 and 31: y using cocoon counter specially me
Page 32 and 33: 6.5 Parameters for investigation Pr
Page 36 and 37: 8. Rearing environment I, trI, III,
Page 38 and 39: 8.0. COCOON DRYING : ': : The prima
Page 40 and 41: The formula for calculation of reel
Page 42 and 43: e.g. Conelitionec weight of raw sil
Page 44 and 45: .- Freserve coeoonslpupae at optimu
Page 46 and 47: Figs.1,6 - L8 Egg Production Fig.16
Page 48 and 49: 10.6.2. Individual moth examination
Page 50 and 51: 113.1b. C'rid acid treatrnerat ' ':
Page 52 and 53: The strength of acid will also chan
Page 54 and 55: efrigerated at2.5"C. Intermediate c
Page 56 and 57: - Record data systematically. , '',
Page 58 and 59: In addition to the generation of in
Page 60 and 61: - Record data systematically. ';,'.
Page 62 and 63: In addition to the generation of in
Page 64 and 65: I 50 1,07.5 25.7 M MEAN 50 84.0 23.
Page 66 and 67: - - t-lse disinfected eleaning nets
Page 68 and 69: Figs.19 ' 23' Cocoons of Different
Page 70 and 71: A srnall cornmittee af Z-3 rnenrber
Page 72 and 73: - The method suggested by Shimizu (
Page 74 and 75: Cocoon - &duscardiire infection (No
Page 76: AICAF Datta, R.K. ESCAP ESCAP JOCV

BIVOLTINE RACE AND

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