Mean (± SEM) number of healthy first and second instar Allokermes kingii per four-branch sample.
| Treatment | Rate (product/water) | 24 April (pretreatment) | 9 May (1 WAT) | 22 May (3 WAT) | 5 June (5 WAT) | 19 June (7 WAT) |
|---|---|---|---|---|---|---|
| Control | — | 69.0 ± 32.1 | 66.6 ± 24.0 | 41.2 ± 8.4 | 43.2 ± 13.3 | 33.2 ± 10.9 |
| Acephate | 226.8 g/378 L (8 oz/100 gal) | 100.0 ± 54.8 | 26.2 ± 8.3 | 13.4 ± 2.4 | 40.6 ± 17.3 | 41.2 ± 21.4 |
| Bifenthrin | 2.3 L/378 L (0.63 gal/100 gal) | 85.0 ± 24.0 | 44.4 ± 22.2 | 16.8 ± 7.7 | 70.8 ± 40.9 | 308.2 ± 118.7* |
| Horticultural oil | 7.6 L/378 L (2.0 gal/100 gal) | 94.0 ± 25.9 | 12.6 ± 4.3 | 13.0 ± 4.9 | 25.6 ± 8.5 | 23.6 ± 6.1 |
| Imidacloprid | 5.7 g/7.56 L (0.2 oz/2.0 gal) | 117.8 ± 49.6 | 71.6 ± 22.5 | 56.0 ± 14.2 | 52.4 ± 37.1 | 57.6 ± 27.3 |
| Oil + acephate | 7.6 L oil + 226.8 g acephate/378 L (2.0 gal + 8 oz/100gal) | 49.0 ± 27.5 | 5.2 ± 2.8 | 7.8 ± 3.0* | 2.6 ± 1.5 | 14.2 ± 12.7 |
| F = 0.41 | F = 2.77 | F = 6.03 | F = 0.91 | F = 4.90 | ||
| df = 5, 24 | df = 5, 24 | df = 5, 24 | df = 5, 24 | df = 5, 24 | ||
| P = 0.83 | P = 0.04 | P = 0.001 | P = 0.49 | P = 0.003 |
↵* Means within a column followed by an asterisk are significantly different from the control (Dunnett’s test) at P < 0.05.