Number of gypsy moth egg masses on oak trees treated with ground-based insecticide applications and sticky trunk barriers.
| Insecticide treatment | Trunk barrier | No. of egg masses per tree (pre-season) | No. of egga masses per tree (post-season) |
|---|---|---|---|
| Control | Present | 42.3 ± 32.3 | 30.0 ± 16.0 |
| Absent | 16.0 ±4.5 | 17.3 + 9.1 | |
| Soap | Present | 88.7 + 41.1 | 59.3 ± 26.5 |
| Absent | 112.0 ±55.6 | 53.7 ± 25.8 | |
| B.t. | Present | 28.7 + 4.6 | 19.7 ±2.4 |
| Absent | 56.0 ± 42.5 | 31.3 ± 12.6 | |
| Cyfluthrin | Present | 84.3 ± 34.0 | 52.0 ± 19.3 |
| Absent | 122.0 ±79.8 | 62.0 ± 59.3 |
Values are mean ± SEM. Result of analysis of variance given in text.
↵a Data transformed to In (x +100) prior to analysis.