I am currently faced with the destruction of caused by leafhoppers, caterpillars and stink bugs. My plan is to coat all the leaves plants with neem oil solution. At $20 a quart it's a bit pricey, but it does the job so well that it's worth it.
Nematodes - Steinernema feltiae - seem to have earwigs and fungus gnat larvae and other soil pests under control. Now to keep the above ground feeders off my vegetation. According to the is research, neem oil won't hurt the beneficial nematodes.
http://openagricola.nal.usda.gov/Record/IND23298557