| Table
32. |
Summary
of Bt Cotton Trials Conducted in India, 1998-1999 |
|
|
Trial
|
Yield
|
%
Yield Increase Bt Hybrids
|
No.
of Bollworm Larvae/10 Plants
|
Fruiting
Body Damage (%)
|
(Kg/Ha)
|
0-60
Days from Planting
|
61-90
Days
|
0-60
Days
|
61-90
Days
|
| Set
A Trials (15 Sites) |
|
|
|
|
|
|
|
Mean
Bt hybrids
|
1464
|
40
|
1.2
|
1.7
|
2.5
|
2.5
|
|
Mean
non-Bt hybrids
|
1045
|
-
|
6.1
|
6.4
|
8.7
|
11.4
|
|
LSD
(0.05)
|
214
|
-
|
2.5
|
2.4
|
4.5
|
7.2
|
|
Set
B Trials (25 Sites)
|
|
|
|
|
|
|
|
Mean
Bt hybrid
|
1694
|
37
|
1.0
|
-
|
1.7
|
-
|
|
Mean
non-Bt hybrid
|
1238
|
-
|
7.9
|
-
|
9.0
|
-
|
| Source:
James, 1999 based on data provided by R. Barwale (personal communication,
1999). |
| |
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