leaf hopper

My two sativa plants were growing great minus some leaf hoppers so I used schultz insecticidal soap and now my leafs are burnt/turning black and my buds are browning. Is this the soaps fault or do I have a nutrition problem? Second year growing so fairly new to all of this. Wondering if I can...

I did a little test on some in the ground plants the other day, to see if I could do with some additional N. New beds using native soil and amendments, I just wasn't sure. Days later, on the plants I fed a little extra N to, I found pests had moved in. Apparently, they're fans of new, and...