> The problem with DE (diataenous earth) is that it is inert; that is, if the
> larva manage to get by the DE, or if you miss a spot, your treatment has
> failed. What I think might be a better idea is a treatment that actively
> searches for and destroys the SHB pupa, and for that bio-control, or
> beneficial nematodes might fit the bill.
>

The subject of nematodes was rasied at EAS and they have/are being looked
at. At that time there was no indication that they attacked the SHB
larvae. There are however different types of nematodes and I do not think
that the testing had considered all of them at that time.