I'd love to see a how to on this. Looks like a great idea for grow beds.

Ever hear of using bug juice to kill bugs? Tilapia breeder Mike Sipe was an entomologist before he got into tilapia. I read about this in the early 70's in Mother Earth News. You take bugs from the area that attack plants. Wizz them up in a blender with distilled water, strain it through cheese cloth or some other filter, and put it in a sprayer. Spray your plants with it.

It works incredibly well. It spikes the plant's natural defences and it produces its own natural insecticides. See http://www.aquaculturetalk.com/2009/05/bug-juice/