Table 2.
Effect of M. anisopliae applied at different stages of the peanut phenology and consequent plant damage and yield response in relation to feeding by white grub larvae
| Treatment time | Total pods | Damaged pods | Full pods | Nuts | ||||
|---|---|---|---|---|---|---|---|---|
| Numbers | % increase1 | % damaged | % reduction1 | Weight (g) | % increase1 | Weight (g) | % increase1 | |
| Germination (day 0) | 34.4 ± 6.8bc | 22.9 | 37.4 ± 3.3d | 36.7 | 60.6 ± 12.8b | 98.2 | 21.6 ± 4.7b | 93.4 |
| Seedling 8-leaf (day 15) | 35.8 ± 3.8b | 27.9 | 38.6 ± 3.2d | 34.8 | 56.3 ± 7.2b | 83.9 | 22.1 ± 2.7b | 97.6 |
| Early flowering (day 30) | 46.5 ± 4.9a | 66.1 | 29.5 ± 3.2e | 50.0 | 80.2 ± 8.4a | 161.9 | 32.3 ± 3.2a | 189.2 |
| Late flowering (day 45) | 30.1 ± 3.3 cd | 7.4 | 43.9 ± 4.1c | 25.8 | 38.0 ± 4.8c | 24.2 | 17.3 ± 2.2bc | 55.2 |
| Pod bearing (day 60) | 30.0 ± 6.7 cd | 7.1 | 47.3 ± 4.8bc | 20.1 | 34.7 ± 9.4c | 13.4 | 16.6 ± 4.3bc | 48.7 |
| Pod filling (day 75) | 30.4 ± 3.8bcd | 8.7 | 50.7 ± 4.5b | 14.3 | 32.5 ± 4.4c | 6.0 | 14.2 ± 1.8bc | 27.1 |
| Control | 28.0 ± 1.5d | 0.0 | 59.1 ± 6.5a | 0.0 | 30.6 ± 5.2c | 0.0 | 11.2 ± 1.6c | 0.0 |
Values are based on mean scores of three plants with five replicates per treatment. Total pods are all pods counted from three plants; full pods the number containing seeds, and nuts the dried weights of the shelled seed
1% decrease in damage indexed against control treatment. Data within columns followed by different letters are significantly different at α = 0.05