Table 2.
Population reduction of Diaphorina citri after first 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 | 16.54 | 36.05 ± 4.03 abc | 50.93 ± 4.89b | 60.20 ± 6.30 a |
| Bifenthrin | 15.91 | 42.94 ± 13.14 abc | 60.49 ± 7.44 ab | 72.00 ± 5.24 a |
| Chlorfenapyr | 16.62 | 35.07 ± 8.99 abc | 56.22 ± 7.76 ab | 60.87 ± 7.41 a |
| Fipronil | 15.66 | 28.24 ± 13.27 bc | 62.47 ± 5.28 a | 66.22 ± 7.68 a |
| Imidacloprid | 16.92 | 44.27 ± 15.20 ab | 63.53 ± 7.39 a | 70.87 ± 5.92 a |
| Pyriproxyfen | 16.40 | 24.24 ± 9.68c | 54.52 ± 3.84 ab | 60.29 ± 7.06 a |
| Thiamethoxam | 15.73 | 50.89 ± 5.54 a | 59.86 ± 3.96 ab | 66.85 ± 4.90 a |
| Control (water) | 17.04 | 0.00 ± 0.00 d | 0.00 ± 0.00c | 0.00 ± 0.00b |
| F, P value | 5.62, 0.0009 | 29.77, 0.0000 | 44.46, 0.0000 | |
| LSD | 19.59 | 11.34 | 12.21 | |
*
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).