Well, an ounce of prevention and all that. fungus/bacteria come in all shapes and attack certain plants. Ever have a new growth rot? Every have a black spot that continues to grow appear? Ever have rust spots? Most are fungal problems. Physan or Consan are a cheap, non-toxic way to prevent these problems as well as a ton of others. For that collection just mix in a spray bottle and spray your plants every few weeks to once a month.