I only have 5 tomato plants & a very small garden. This year one plant (Jet Star) seems to have bacterial speck. (Curled leaves and pinprick sized black specks all over the fruit. I believe that the plant had the disease when I bought it. Do I need to throw that plant out in hopes of saving the other 4? Or can it be cured? What do I need to do to protect the plants and future plants? I read something about a copper spray but who sells it? Thank you.
Anoka County Minnesota