Table 2 Effects of insecticides on colonization of elm logs by European elm bark beetles.a Treatment | Numbers of egg galleries and (brood) |
---|
0b | 5 | 10 | 20 |
---|
Chlorpyrifos | 0 | 0 | 0 | 0 |
Methoxychlor | 0 | 0 | 0 | 0 |
Carbaryl | 0 | 4(479) | 15(509) | 0 |
Control | 12(1000c) | 4(123) | 12(677) | 0 |