Hello everyone, I'm not too experienced with citrus and got into them last year. I have a Meyer Lemon, Kumquat and a Australian Finger Lime and a yuzu ( I left the yuzu outside and it is doing fine). I live in Vancouver. They rest are grown inside for now and I have a grow light. A few weeks ago I found the leaves starting to drop and realized mealy bugs infested my Meyer Lemon and Kumquat and not the Finger Lime. I'm not sure if it is only the mealy bugs or something else wrong. So I got some neem oil and put some dish soap and made a solution as suggested on the bottle and I sprayed the plant outside. After bringing spraying it outside and bringing back inside it appears its dropping leaves at a even faster rate. I'm not sure what happened. Attached is a picture of my Meyer Lemon with no leaves and the branches are turning brown and my Kumquat still have leaves but it is slowly dropping as well. Does anyone have suggestions on saving the Meyer Lemon, it was doing so well in the summer outside, and was doing well inside until last week, all the leaves dropped.