Table 1.
Mean number of Thaumastocoris peregrinus (Hemiptera: Thaumastocoridae) nymphs and adults per eucalyptus leaf in the biological and chemical insecticide treatments before application and at 1, 14 and 21 day after application.
| Treatment | Before | 1 DAAa | 14 DAA | 21 DAA |
|---|---|---|---|---|
| Beauveria 0.5 Kg/ha | 7.52 a | —b | 0.30 ab | 0.17 a |
| Beauveria 1.0 Kg/ha | 8.03 a | — | 0.26 a | 0.44 ab |
| Beauveria 1.5 Kg/ha | 5.28 a | — | 0.65 ab | 1.59 cd |
| Metarhizium 0.25 Kg/ha | 0.17 a | — | 2.08 b | 1.27 bcd |
| Metarhizium 0.50 Kg/ha | 0.44 a | — | 0.30 ab | 1.54 cd |
| Metarhizium 1 Kg/ha | 1.59 a | — | 0.63 ab | 2.09 d |
| Actara (thiamethoxam) 0.1 Kg/ha | 5.91 a | 0.69 a | 0.27 a | 1.42 cd |
| Actara (thiamethoxam) 0.15 Kg/ha | 3.54 a | 0.74 a | 2.00 ab | 0.93 abc |
| Actara (thiamethoxam) 0.2 Kg/ha | 5.73 a | 0.75 a | 0.94 ab | 1.56 cd |
| Engeo Pleno (lamb. + thiam.) 0.2 L/ha | 6.06 a | 0.32 a | 0.60 ab | 0.43 ab |
| Orthene (acephate) 0.5 Kg/ha | 2.96 a | 0.90 a | 0.58 ab | 0.16 a |
| Control | 2.61 a | 2.95 b | 1.36 ab | 4.14 e |
| CV (%) | 40.01 | 17.68 | 23.32 | 12.09 |
| F | 0.61ns | 9.90* | 3.28 | 23.45* |
lamb. + thiam. = Lambda-cyhalothrin + thiamethoxam. The data were transformed (x + 0.5)1/2 before the statistical analysis. Means followed by the same letter per column did not differ from each other by Tukey test (p < 0.05). aDAA = days after insecticide applications. bUnsatisfactory evaluation in the treatments with mycoinsecticides due to insufficient time to cause insect death.