What do the roots look like? That is what I would love to know about your italian stone pine? Do they look alive and growing? I have this tree and I thought it was dying I really was not paying any attention to this thing. I did not water it when I first got it. I didn't read how to take care of it. It had said not to overheat it such as being indoors near a heater or something. In no way did it say put it outside. I ignored the thing. I figured it's a tree it can take abuse and go without watering for some time. When I got around to it I repotted it. I had noticed the soil it was in was poor! And hard even. The new soil I gave it was fresh and can retain the water well and feed the roots. I never give up on plants if those roots are still growing the thing is still alive. Perhaps your overthinking what to do with your nifty little tree. How are your needles falling off? Do they easily come off by you pulling? Or are they falling off by themselves? When you say this tree is shrivelling how so? is this thing limp like a noodle here? Give it time that is my opinion don't mess around with it too much. No matter what type of plant or tree or whatever you have there are just a few factors that will contribute to it still growing sunlight,water most plants don't need too much of either. Most plants will adapt if something is lacking. However your talking about a studio apartment your temperature could indeed affect it. Try putting it in the coldest spot in the place. Moving it into the hallway could indeed help give it some much needed sunlight. However.... your overthinking doing that. I repotted mine I made sure i completely saturated the roots and used some good soil with fertillizer in it. After that I left it alone and watered it whenever the heck i got around to it. I guarantee if u repot it will come back during the summer. I also have another trick when u replant it use a big pot get another plant or another tree even and plant them together. That sounds crazy but don't trees and plants live together outside. Birds poop and stuff fertilizing these living things. you had asked shud I fertilize it. yes! I don't care what you did wrong. Your plant still could be alive and come back. In my opinion you over watered why else would it become limp. It is just this itty bitty baby tree not some hearty giant tree. If your tree could talk it would say omg!!! a flood is occuring!!! yes thanks for this sunlight but let loose the water and get some nutrients in here!! What difference does it make even if u make and effort to save it what do you have to lose even if it does die. What does the base of it look like? is it brown and look like the trunk of a tree? or black and done I'd wait till something I own to be done personally. Look outside your window at trees are there people tending to them? No. Trees find a way. Trees even cut off life from other living plants. Trees even expose the extraordinary properties of water. Without these properties trees wouldn't even exist. What type of water are you using? is it from your faucet? What kind of water do you have? Cud a bit of spring water help? These are very good questions perhaps you didn't consider. No matter. You did a good job asking a question. To end this answer you could have very well indeed had stuck your tree in a cold corner with little sunlight in a drainage pot in a bowl of water and the tree will drink when it wants but in no way spoil it. It is a tree.

It is true that more info is needed in order to better help you. I have a 7 yr old Weeping Willow (about 25' x 25') that I have had numerous problems with. It has Marssonina Leaf Spot, Anthracnose and Canker. It will leaf out, then many of (mostly the lower) twigs and leaves will start to turn brown, curl up, die off, etc. This tree has had these problems for about 3-4 years, now. Usually, by mid-summer, it has lost most of it's diseased parts (or I will have already had cut them off by then) and the new growth comes out fine. This year in the PacNW, we've had a very cool and wet spring and this has made the problem much worse on my tree. About 1/2 of my tree is nearly bare, but there is a lot of new growth starting out on the top and sides. The inside areas are completely leafless. I spent part of this weekend cleaning out a lot of diseased material and there's not too much of my tree left. I'm considering removing it, even though my wife and I love Weeping Willows very much (it was a tree we planted right after moving in to this house...special for us). If your leaves are curling up with brown/black spots on it and you have twigs that have brown patches, some with white centers, it would appear to be Marssonina Leaf Spot, if the new growth is turning brown and shriveling up and dying in place (like someone took a torch to it), it would appear to be Anthracnose...and if the branches have brown/black sections where new twigs or leaves join it, it would appear to be Canker. I could definitely be wrong, but that's what I've found/read in a lot of searching on the internet about it. My wife and I love Weeping Willows, but it is true...they are fast-growing, short-lived, disease-prone trees. They look pretty in their prime, but when they get a disease, it can detract significantly from their beauty. Hope this helps. Good luck to you and your willow...

Because it's a small tree, it's probably willow borer (larva of a weevil). In large trees, it's usually the larva of the goat moth. Plenty of web pages on both. Joe

Did you remove the scale or the tree? Can you post a picture of the tree with a close up of the scale? What kind of trees did you loose and how old were they? If you have multiple trees with the same issue I would want to id the problem before replanting with more fruit trees since it sounds like whatever it is is spreading. The good news is that once the weather starts to cool in the next few weeks a lot of nurseries will be having fall sales. Watch out for potbound roots. If possible look at the roots before you buy and stay away from any tree with long roots circling around the bottom of the pot. Good luck!