I have read where people say not to use DE around beneficials such as praying mantis' but then again I have seen people say that they have observed them being fine around DE.
We have and use DE but are selective with its use in regard to
insect control. To us it is a lot like insecticide in that it kills the insect, not that it is a chemical of
course. (When I say 'we' I mean me and my wife) We try to have plants and beneficials to control the unwanted insects.
Again, there appears to be a lot of confusion on this subject. I think there are benefits to using DE, not just for insect control though. I hope to see more responses here.