Recommend fungicide (or something else?)
Hi there, I have some tuberous begonias in large pots outside. I just threw away a plant that I'm fairly certain has died of Rhizoctonia. (One stem wilts and loses all turgor and turns brown/black at the soil line, and then the rest of the stem and leaves die. I didn't notice any spots or webs. I didn't water it very often, but enough to keep the soil moist once it almost dried out so I don't think I was overwatering.) I found Rhizoctonia online and it seems the best fit, and the recommendation was a fungicide but there was no specific recommendation and I don't know anything about fungicides. I'm sorry I didn't take a picture to share. A plant in the next pot now appears to have it and I threw it out too. :( I also have some impatiens, which I noted online are also susceptible to Rhizoctonia. So far they seem ok, but they are situated close by. So my question is, what do you recommend? Thank you.
Marion County Oregon