"Doug" wrote in message
om...
| A forest in Colorado had Spruce Budworm back in the 1930's. They
| sprayed with DDT. It killed the worms. The trees died, but their roots
| did not. A new tree grew out of each root structure right next to the
| dead tree trunk. We now have the world's weirdest forest, with a dead
| tree and a distorted live tree right next to the dead one. This would
| not have happened if they had not sprayed.
|
| I was flying up in Canada west of Prince George. There is a huge area
| there infected by pine beetles. The locals are bemoaning that the
| government doesn't do anything. Trouble is, there isn't any fix that
| will give a better result than mother nature running her course. Been
| there, done that.
|
| I'm not saying there aren't times when insecticides are appropriate.
| But not always. Biological systems are very complex. We humans just
| don't know and don't have all the tools to do the right thing. Nature
| does. Just give it time.

Sure, if you don't mind the Dutch elm becoming extinct.