Table 2.
Mortality rates of older (3rd instar) larvae of P. fullo in response to the products tested 3, 7, 14, and 21 d after application (A) under laboratory conditions*
| Test materials and concentrations used (ml/100 l water or g/m3 of soil medium) | Mean percent mortality (±S.E.) after application A+3 A+7 A+14 A+21 | |||
|---|---|---|---|---|
| B. bassiana (EC) | ||||
| 100 | 8.6 ± 3.3BCDyaz | 19.3 ± 3.7 Bb | 27.4 ± 3.6 Bb | 28.1 ± 4.3 BCb |
| 150 | 14.1 ± 3.9 CDa | 32.4 ± 3.8 Cb | 49.5 ± 5.2 DEc | 51.2 ± 6.2 DEc |
| 200 | 17.5 ± 5.6 Da | 41.6 ± 5.6 Db | 71.6 ± 6.5 Gc | 70.1 ± 5.6 Gc |
| M. anisopliae (EC) | ||||
| 75 | 3.6 ± 1.8 ABa | 13.2 ± 3.4 Bab | 23.7 ± 4.5 Bb | 21.3 ± 3.9 Bb |
| 100 | 7.8 ± 2.6 ABCa | 19.3 ± 4.2 Bb | 35.1 ± 4.8 BCc | 39.5 ± 5.1 CDc |
| 125 | 11.2 ± 3.3 BCDa | 31.7 ± 4.1 Cb | 59.4 ± 6.4 EFc | 61.8 ± 5.6 EFGc |
| M. anisopliae (GR) | ||||
| 500 | 8.9 ± 2.3 BCDa | 17.2 ± 3.7 Bb | 24.8 ± 4.1 Bbc | 26.0 ± 3.4 Bc |
| 1,000 | 12.4 ± 3.4 CDa | 28.6 ± 5.2 Cb | 44.1 ± 5.1 CDc | 43.6 ± 4.5 Dc |
| 1,500 | 11.7 ± 4.1 BCDa | 30.5 ± 4.4 Cb | 65.9 ± 4.8 FGc | 67.6 ± 5.7 FGc |
| Positive control (chlorpyrifos-ethyl)x | 38.4 ± 6.4 Ea | 58.6 ± 6.0 Eb | 56.3 ± 6.2 EFb | 57.1 ± 6.1 EFb |
| Negative control (tap water) | 0.0 ± 0.0 Aa | 0.0 ± 0.0 Aa | 3.7 ± 0.7 Aa | 2.6 ± 0.8 Aa |
*Values are means of four replicates. xThe standard insecticide, chlorpyrifos-ethyl, used for comparison was applied at the recommended label rate (150 ml/100 l water). yMeans within a column followed by the same capital letter are not significantly different (DMRT, P ≤ 0.05). zMeans within a row followed by the same lower-case letter are not significantly different (DMRT, P ≤ 0.05).