Effectiveness of two insecticides for remedial treatment of SPB-infested pines. (Beetles/ft2, mean ± standard error.) Each mean is the average of eight 20-cm-long pine bolts treated during mid-to late stages of brood development.
| Response | Pesticide treatment | ||
|---|---|---|---|
| Control | Chlorpyrifos 1% | Lindane 0.5% | |
| Beetles emerging % of control | 124.1 ± 18.8 | 45.3 ± 19.4 36.5% | 31.6 ± 10.6 25.5% |
| Beetles flying % of control | 104.7±18.8 | 1.6 ±0.8 1.5% | 1.1 ±0.7 1.1% |