Table 3.
Population reduction of Diaphorina citri after second spray of insecticides.
| Insecticide treatments | Pre-treatment (mean population per leaf) |
Post-treatment (Percent population reduction* ± SEM) |
||
|---|---|---|---|---|
| 1 DBS | 3 DAS | 7 DAS | 12 DAS | |
| Emamectin benzoate | 19.67 | 60.11 ± 5.24 bc | 56.14 ± 11.18c | 76.79 ± 7.44b |
| Bifenthrin | 16.36 | 72.66 ± 11.17 ab | 85.99 ± 4.85 ab | 89.50 ± 3.48 ab |
| Chlorfenapyr | 17.88 | 71.35 ± 9.59 ab | 89.59 ± 5.12 a | 93.17 ± 2.52 a |
| Fipronil | 17.26 | 64.11 ± 12.40 bc | 83.92 ± 4.21 ab | 89.96 ± 2.72 ab |
| Imidacloprid | 16.94 | 73.20 ± 3.37 ab | 85.58 ± 3.15 ab | 90.18 ± 1.72 ab |
| Pyriproxyfen | 18.11 | 55.21 ± 11.12c | 71.89 ± 12.16b | 88.93 ± 0.91 ab |
| Thiamethoxam | 17.28 | 83.36 ± 2.69 a | 92.66 ± 1.42 a | 85.60 ± 9.24 ab |
| Control (water) | 18.19 | 0.00 ± 0.00 d | 0.00 ± 0.00 d | 0.00 ± 0.00c |
| F, P value | 23.45, 0.0000 | 35.31, 0.0000 | 32.18, 0.0000 | |
| LSD | 15.65 | 15.29 | 13.82 | |
*
Means sharing the common letters are not significantly different from each other. LSD = least significance difference; DBS = days before spray; DAS = days after spray; SEM = standard error of mean. Pre-treatment data indicated the mean psyllid population/ leaf collected from twenty-five randomly selected leaves of a plant. Pre-treatment population was above the economic threshold level (6 nymphs or adults per leaf).