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Table 1. Crown
disease / spear rot incidence and severety at the nursery and field according to some
agronomic-nursery practices
| Nursery Treatment |
Nursery
Incidence (%) ¹ |
Affected
leaves
/plant |
Dead
leaves
/plant |
Bended
leaves
/plant |
Palms
diseased
% |
Severety
index
(0-2) |
| Spacing |
90 cm |
9.5 |
2.32 ** |
1.31 |
1.28 |
0.11** |
0.68** |
| 137 cm |
4.6 |
0.88 |
0.22 ** |
0.68 |
0.04 |
0.34 |
| Bag size |
40x53 cm |
5.3 |
0.79 |
0.27 |
0.58 |
0.0 |
0.29 |
| 51x61 cm |
8.8 |
2.41 ** |
1.25 * |
1.37** |
0.10** |
0.72** |
| Fertilization
² |
1 |
7.0 |
1.63 |
0.96 |
0.88 |
0.09 |
0.54 |
| 2 |
7.1 |
1.57 |
0.56 |
1.07 |
0.06 |
0.55 |
| Interaction |
90*40x53 cm |
6.2 b |
1.01 b |
0.48 b |
0.67 |
0.05 b |
0.35 |
| 90*51x61 cm |
12.8 a |
3.63 a |
2.13 a |
1.89 |
0.16 a |
1.01 |
| 137*40x53 cm |
4.3 b |
0.57 b |
0.07 b |
0.50 |
0.03 b |
0.23 |
| 137*51x61 cm |
4.8 b |
1.19 b |
0.37 b |
0.85 |
0.04 b |
0.44 |
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- Nursery incidence (12 months) was calculated on 25 plants/plot (Randomized
Block Design with factorial array and 12 replications). At the field (24 months), plots
were 9 plants each (6 replications).
- Base fertilization and the double of the dose.
*: P = 0.05, **: P = 0.01
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