On the Breeding of Bivoltine Breeds of the Silkworm, Bombyx mori L. (Lepidoptera: Bombycidae), Tolerant to High Temperature and High Humidity Conditions of the Tropics
Table 6
Generation wise mean performances for rearing of HH112 at two temperature conditions.
C and % RH
C and % RH
Generation
Fecundity (No)
th age larval span (hrs)
Survival rate (%)
Yield/10,000 larvae (kg)
Cocoon Wt. (g)
Shell Wt. (g)
Cocoon Shell%
Fecundity (No)
th age larval span (hrs)
Survival rate (%)
Yield/10,000 larvae (kg)
Cocoon Wt. (g)
Shell Wt. (g)
Cocoon Shell%
F1
600
130
53.8 (46.74)
16.04
1.600
0.325
20.33 (26.80)
600
148
91.6 (73.1)
18.76
1.756
0.382
21.77 (27.81)
F2
484
134
60.7 (51.2)
15.25
1.562
0.330
21.16 (27.29)
484
144
92.6 (74.2)
18.73
1.834
0.406
22.16 (28.08)
F3
470
134
53.0 (46.74)
14.77
1.521
0.334
21.96 (27.94)
470
144
94.4 (76.3)
18.88
1.821
0.407
22.32 (28.19)
F4
464
134
65.7 (54.1)
14.77
1.585
0.325
20.51 (26.92)
464
144
93.8 (75.5)
18.77
1.915
0.430
22.46 (28.29)
F5
450
134
56.3 (48.5)
15.93
1.571
0.329
20.96 (27.24)
450
150
92.7 (74.3)
19.81
1.947
0.438
22.50 (28.32)
F6
455
—
—
—
—
—
—
455
144
92.3 (73.8)
18.78
1.839
0.414
22.51 (28.32)
F7
625
134
77.7 (61.8)
13.74
1.579
0.336
21.30 (27.48)
625
150
91.1 (72.6)
18.94
1.823
0.415
22.75 (28.49)
F8
462
—
—
—
—
—
—
462
144
91.8 (73.3)
18.47
1.847
0.421
22.78 (28.51)
F9
632
132
83.7 (66.1)
16.42
1.598
0.327
20.46 (26.89)
632
144
92.5 (74.1)
19.27
1.863
0.424
22.74 (28.48)
F10
468
—
—
—
—
—
—
468
144
92.5 (74.1)
18.92
1.775
0.396
22.34 (28.21)
F11
610
132
83.3 (65.8)
15.94
1.569
0.327
20.83 (27.15)
610
144
93.6 (75.3)
18.71
1.808
0.411
22.72 (28.47)
F12
470
—
—
—
—
—
—
470
144
92.6 (74.2)
18.71
1.759
0.396
22.50 (28.31)
Mean
516
133
66.78
15.357
1.574
0.33
20.938
516
145.00
92.6
18.90
1.832
0.412
22.46
-test
ns
ns
*
***
ns
ns
ns
ns
ns
ns
ns
*
**
ns
CD at 5%
—
—
18.7
0.92
—
—
—
—
—
—
—
0.10
0.02
—
CV%
14.61
1.14
19.48
6.26
2.29
3.22
4.16
14.61
1.69
1.90
2.57
4.10
4.28
2.02
significant difference at 5%, 1% and 0.1% level, respectively. ns: Denote non significant. Values in parenthesis are angular transformed.