Hello, i have a white widow that just went into pre-flower. I'm growing outdoors, and had a good rainstorm role thru and broke a lower branch from weight of water or wind. But i was out of town for a few days and didn't get to it until i noticed a problem. My stem where the branch broke discolored and started to mold a little all around the main stalk. Sadly, i noticed this about 4 days after the rain but i just sprayed it down with a light solution of water and hydrogen peroxide. What else can i do to help this. I am picking up some grafting tape in the morning. Thank you for any help i can get.