Summary of mean number of emergence holes, number of emergence holes per bole surface area (cm2) and adult weevil emergence by treatment, when insecticide sprays were applied on March 12, 1985 in southern Illinois.
| Insecticide | Formulation and rate | Mean number of emergence holes1 | Number of emergence holes per bole surface area | Number of emerged adult weevils |
|---|---|---|---|---|
| carbofuran | Furadan 4F 1 lb ai/100 gal | 5.5a | 0.005 | 34 |
| chlorpyrifos | Dursban 4E 1 lb ai/100 gal | 72.0b | 0.9 | 399 |
| check | — | 40.3c | 0.03 | 202 |
1 Tukey’s Studentized Range (HSD) Test Means followed by the same letter are not significantly different at the 5% level.