Narrator: This is Science Today. A pest called the codling moth causes millions of dollars in damage every year to apples, walnuts and other crops. Entomologist Lou Falcon of the University of California, Berkeley says that traditionally, conventional pesticides have kept it under control.
Falcon: However in recent years resistance has been showing up, and it appears that it takes more chemical now than it did a few years ago. And even with more chemical the control appears to be failing, so that it may not be around too much longer.
Narrator: Fortunately, the government has approved an organic pesticide developed by Falcon -- a virus that attacks only the codling moth -- and just in time too. There are no new chemical pesticides on the horizon.
Falcon: The development of new pesticides is very very very slow, extremely expensive, and the chemical industry is really not producing or developing very many new pesticides. So not only is it a matter of supplanting, but it's a matter of finding alternatives.
Narrator: For Science Today, I'm Steve Tokar.