名媛直播

Hi, so, like the title, my Chinese elm is dying, and I don't know why.
It's my first ever bonsai, so I have been super careful. I read everything I could about the topic. I kept it outside, in plain sunlight (except for mid hours), I kept it well hydrated, being careful with the soil always been wet (during summer I watered it everyday, in autumn every 2-3 days, always keeping an eye on the soil), and, from September until now, every 14 days I fertilized it with a neutral liquid fertilizer.
I think the problem has to be related to the pruning I did. I never read anything about a bad pruning killing a bonsai, but it's that or it has some kind of disease (what appears to be mold is starting to form at the base of the tree (second pic)), I even found 3 small green worms (more like caterpillars) that were eating all the leaves (now most of them fell).
Is there anything I can do? I was thinking at some pesticide, but first I wanted to ask here.
Thanks in advance for any answer.

I don't know the cause apart from taking it inside, , At this time of year depending on what country you are in, it would normally start to lose leaves if it was in the natural environment but the roots look poor and the soil also. Pruning did not kill it, and you are wasting fertiliser on a sick tree. You could keep it for a while to see if there is any life

Roots, apart from the white part, have always been like that. Also, I took it inside after leaves started falling. I'll try to leave it outside, watering it normally and I'll see if it just winter or something else. Thanks!

n1ckk wrote: Also, I took it inside after leaves started falling.

Yes... that's what we see in nature too. It gets colder, there's less light, leaves start dropping, so the trees pack up their things, move inside, have a scotch and wait for spring to return.

n1ckk wrote: Also, I took it inside after leaves started falling.

A sure way to kill it.

I took it inside just because I didn't know what was going on. It's my first bonsai, it was a gift, I didn't want it to dye just like that. Plus, it stayed in the house for like 7 days in total, now it's back outside.
So, it's normal for it to loose leaves? Even if I found worms on it? Should I use a pesticide anyway?

n1ckk wrote: So, it's normal for it to loose leaves?

You mentioned it's autumn. Look outside, look at some trees. What do you see?

Even if I found worms on it? Should I use a pesticide anyway?

For worms? No. But you'd need to know if they're worms first.

Outside all trees have no leaves.

For the worms I don't know. They were more like caterpillars: small, green with black appendices.

Chinese Elm should come inside (although they can survive outside if sheltered/winterized properly) in a window facing south. If you have to use a north side window supplement with grow lights. Four to six hours of sunlight minimum per day. Make sure you use a dip tray to keep the humidity up. Spray the leaves when it has them. It will lose leaves for the winter, that's normal. Water less but make sure you water and don't let the soil dry completely, just don't keep it too wet. Don't fertilize when the tree should be going dormant. Come spring use half strength fertilizer and put outside.