I got this pretty indoor plant little over a year ago. The plant was doing well till a few weeks back when I noticed some white powdery substance on the leaves and the stem. I bought the Garden Safe Fungicide which I have sprayed once every week during the last 3 weeks. I also left the plant out in the sun for a few days to see if that helps. I now find that the leaves have started to brown a lot. Please see the attached image.
Would love some help on what I can do to save the plant. I don't know a lot but would hate to lose this lovely plant.
Thank you so much!