Please help! I bought my first Chinese Elm a few months ago and I absolutely love it. It has been doing very well growing healthily and I have even proved it now.
Disappointingly, it then seem to suffer an aphid attack. I didn't realise at first until I noticed the small white specks and the leaves becoming sticky, as well as the surface my bonsai I was sitting on. Googling suggested first trying soap solution. I tried this and it had no effect. I also read that a three parts water one part vinegar might work. This didn't work either. I then bought a houseplant insecticide product from the garden centre - image attached. Things then went from bad to worse. Please see the attached photos of the leaves. The bonsai is now shedding leaves at an alarming rate. I am keeping my bonsai regularly watered. And have fed it twice now since I bought it. Any suggestions and help would be greatly appreciated.
I have kept my Chinese bonsai mainly in the house in front of a well lit window, but also outside when the weather has been warm.