I use to use it when i serviced commercial aeroponic systems. its really for insects and not so much for foliar feeding. i would dilute it and add a few drops of dishwashing soap. It can also be used systemically (directly in the reservoir)
if youre trying to prevent or kill bugs it is about as god as using dish soap with vegetable oil. nothing special
is you want it for foliar feeding, id prefer a good calmag or even GH Florolicious Plus
i actually used to use it on vegetables especially lettuces, chards, cilantro and various peppers. Made by GH as i recall. it has a small booklet on the usage if you have a magnifying glass to read the fine print. one thing i will say from experience using the product is it clogs spray bottles? However, no deaths ever happened as far as i know on my end..