I was looking for a solution for all these raised black spots on one leaf of my bird of paradise. I decided after reading this thread to clean them off. I used a lil dish detergent to make some soapy water and I literally gently scrubbed them off with a sponge and worked the leaf over again with paper towel. The leaf is clean and doesn’t appear any worse for wear tho it felt weird using a lil soapy water to clean a plant. But it worked and looks fresh And I removed all the raised weird black and brown spots. The spots didn’t spread to other leaves so I’ll keep an eye on it and hope for the best. Im a newbie and never tried Neem but I may buy some just in case. Just my $.02 and I’d do it again. It worked—so far.
Q