I picked up a Fukien Tea bonsai at a garden show a couple of weeks ago. The day after I got it, I saw ants on it and thought I saw aphids. I immediately sprayed it with neem oil and watched it closely. After 2-3 days, ants were gone and I didn't see any aphids. Then a couple of days after that, I saw black mold on it, so I sprayed it with fungicide and removed all the affected leaves I could see. Now, it is losing its leaves by the ton - at least 50 or more a day.
I don't know if the leaf loss is due to my spraying for aphids and black mold, or if it's just that time of year that a Tea would normally lose leaves.
I have it on my back porch where it receives bright light all day, and some diffused direct light in the late afternoon. I keep a skewer in it to measure moisture, and water when needed. Our temperatures have been in the low to mid 80s.
I can't post a picture of it now, but will later.
Any ideas why this is happening? Any comments and/or suggestions are greatly appreciated.