Ecological Pest Management, really, you should take a look.

[Lawntimes.com]

Controlling diseases, and pests through biorationals is an interesting, informative and useful database available from ATTRA.
Don't laugh, check it out.

http://www.attra.org/attra-pub/biorationals/

What are biorationals? Although there is no universally accepted definition, in the context of this database, "biorational" refers to pesticides in one of the following categories:
microbial pesticides: formulations of viruses, bacteria, fungi, or nematodes that have low non-target impacts;
pesticides derived from plants that have low non-target impacts and degrade into non-toxic components; and/or
various new types of pesticides, such as particle film barriers, pheromones, and compounds such as Spinosad, that have low non-target impacts and degrade into non-toxic components.