I've had a nice sized Pachypodium lamerei for several years. Recently it hasn't been growing as fast. And the young top leaves have turned black and fallen off. Upon closer inspection, on the surface of the plant's flesh, between the spines, I see some clumps of amber/golden brown things that look like tiny eggs maybe? They are small as a pin head. I just swabbed them off with a q tip and some rubbing alcohol. Any idea what these are? And should I take more extreme measures?