Table 2.
Infestation and damage to cowpea grains naturally infested and stored in PICS bags and woven bags at the INRAN Maradi Station in Niger for 4.5 months inside a laboratory and outside with direct sun exposure. Means followed by the same letter are not significantly different (LSD. 5%).
| Treatment | n |
C. maculatus infestation per 100 seed |
C. maculatus damage |
|||
|---|---|---|---|---|---|---|
| Pupae | Alive larvae | Adults | 100 grains weight | % of grains with holes | ||
| Initial infestation and damage | 108 | 1.6 ± 0.1a | 0.9 ± 0.1a | 3.2 ± 0.2a | 14.4 ± 0.0a | 11.5 ± 0.4a |
| PICS inside after 4.5 months | 54 | 1.8 ± 0.1a | 0.4 ± 0.1a | 3.5 ± 0.2a | 14.8 ± 0.1a | 11.6 ± 0.4a |
| PICS bags outside after 4.5 months | 54 | 1.8 ± 0.2a | 0.6 ± 0.1a | 3.5 ± 0.3a | 14.6 ± 0.2a | 12.0 ± 0.5a |
| Woven bag inside after 4.5 months | 54 | 3.5 ± 0.6b | 3.1 ± 0.5c | 19.6 ± 1.9b | 10.2 ± 0.2c | 84.7 ± 2.9b |
| Woven bag outside after 4.5 months | 54 | 6.7 ± 0.5c | 2.4 ± 0.3b | 18.4 ± 0.9b | 12.0 ± 0.1b | 100.0 ± 0.0c |
| ANOVA | F=56.25; P<.01 | F=22.60; P<.01 | F=180.05; P<.01 | F=130.41; P<.01 | F=1878.00; P<.01 | |