Early Blight or Septoria?

[ArthurDent004]

I used two tablespoons for a gallon of water and I applied it using a spray bottle from Walmart. I saw a a few leaves that had black spots under the leaves and a couple other leaves had brown edges that had curled. I removed these leaves and then sprayed the plant until the leaves were dripping. When I saw the black edges on the leaves I was wondering if I was seeing leaf burn or more infection.