Need help on my cherry tree

It seems my cherry tree is eaten by something, some leaves only have part of the stem left. However I did not find any insects for most of them.

Enemies of the Sweet cherry (Prunus avium)

Silver leaf, bacterial canker, blossom wilt; aphids, caterpillars, leaf-mining moths, winter moth caterpillars

From what I can see, there is probably a caterpillar or three hiding under a leaf somewhere on the tree...

Looks like grasshopper damage to me. (That is why you didn't find any bugs).

And how would you deal with the grasshoppers?

How to deal with grasshoppers might depend on what kind of grasshoppers they are.

Where I live in Texas I just stomp on them.  these are mine:

https://permies.com/t/59917/Southeastern-Lubber-Grasshopper-Jabba-Hutt

https://permies.com/t/160957/Eastern-Lubber-Grasshoppers-kill-em

Here are some threads on how to get rid of grasshoppers:

https://permies.com/t/165256/Grasshoppers-control

https://permies.com/t/61746/Grasshoppers-Seeking-natural-solution

https://permies.com/t/38775/Grasshoppers

I immediately thought grasshoppers as well. When I have them in the garden I go stalking with a kitchen scissor and cut every one i can find in half- if they don't fly away when they see you, they will often freeze and you can just get right in there.
If I notice they're around and I have something tender or that needs special care, I might cover it with bird netting. And if I ever see a fleet of juveniles, I stomp them all or throw them in a bucket of soapy water. They are beautiful (our adults are stripey, the young ones are a glossy black and red) but no mercy.
(if you're not sure, with caterpillars you often find their frass [poo] around, with grasshoppers not so much.)

They also make excellent fishing bait...

A bird house might be good as well

I have a praying mantis that likes them too...

Thanks all.
I didn't find grasshoppers around the tree.  I am in North California,  bought and plant this tree this January.
There seems no good leaves left on all its branches. I pickuped four typical leaves and take a photo.

no sticky things or webs or any small caterpillars anywhere?

that third leaf looks like maybe it was some kind of beetle; usually grasshoppers don't leave the veins and structure of the leaf, they just cut it all.

I don't know where you are, and it looks like the tree is right on the street, but this is what i would do if it were me: I'd make a spray with oil, soap, and garlic. (puree 2 cloves of garlic, put it in 2 tablespoons of vegetable oil, leave overnight. strain, discard the garlic, add 1t liquid soap or dish soap to the oil, then dilute in a liter of water and spray on). or maybe you could use neem oil if you have that. something that leaves a smell that might discourage visiting insects from feasting again. (if it rains a lot where you are this might be problematic. don't spray on a sunny day, and check the weather- don't spray right before rain or you'll need to do it again.)

Hi, Tereza,
I am in North California. I did find one small green worm on a leave in one low branch, however I did not find anything on other branches.
I sprayed neem oil ten days before, and seems not help much
Thanks,
Feng Lu

Hi Feng,
I agree with Anne and Tereza that it looks like grasshopper damage. And truth be told I am doing battle with grasshoppers as we speak. They eat almost every sprout of any plants that I direct sow. Didn't get any carrots for 2 years until I realized they were the culprits. I would only see one occasionally so I did not expect it was them. Now I know better.

BUT, I just thought I'd mention this. It's a long shot but also a distinct possibility. For some strange reason weird and strange stuff happens in my garden all the time. Things that just don't happen to a lot of other people. I think it's because Mother Nature has a really wicked sense of humor!

Many people here grow sunflowers. Many people! They are always very pleased with them. So I grew sunflowers one year. And the darned birds ate them! Not the flowers or the seeds, the whole plant! They would shred the leaves and it looked just like your pictures. Teeny tiny little gray birds would show up every morning at daybreak, long before the sun came out and start chomping down. And another little bunch of birds, I think they were finches would show up each afternoon right around 1 or 2 o'clock and do the same thing. And it seemed like they were all on a schedule because I realized they came at the same time every day.

I tried throwing bird netting over them but the birds were so tiny and light that they would just land on the netting and have a feast. I tried building a ridiculous looking cage and threw the netting over that so the birds couldn't reach the plants  but the little buggers would land on the ground underneath and then fly up inside. Anyway, they lived to be 4-5' tall before the birds killed all the plants and before I came up with a solution. Some years all the critters will do very strange things. And just to show that it happens to other people as well you can look at these websites about cherry trees.

https://georgiawildlife.com/out-my-backdoor-dont-eat-my-spring-flowers
https://www.gardenerscorner.co.uk/threads/something-eating-the-cherry-tree.4089/

So, if you can't find any other culprit, take some time to watch for some birds. And try to enjoy the birds. I had about a dozen species that were torturing me just fly away 2 years ago and never came back. Happy gardening everyone.

Debbie Ann wrote:..... And the darned birds ate them!

I hear you-- at this very moment I have birds demolishing my snow peas. The yard next door is full of citrus rotting on the trees, but the tanagers prefer to eat the tender leaves. They're sweet!
I love tanagers, they're beautiful, and I'm glad for what I have, but...... %(¨!&%¨!@$%)* birds!!!

Try holding a bucket of soapy water below affected branches and tapping the branch sharply with a stick. If the critter is still there it will fall into the bucket (or fly off depending on what it is).

To add to the possibilities,  I have weevils that do similar damage to some shrubs. I knock them in the soap water and drown them.

"I did find one small green worm on a leave in one low branch"

I think you found the culprit !

Those worms can do a lot of damage in a short amount of time.

One day dear hubby said that the deer were eating the honeysuckle bush.  I went over to look and it was worms (caterpillars) and not deer.

I got a pail of water and drop those pesky things into the water so they drowned.

I'm betting that William Kellogg is right! Please let us know if you find the actual culprit in the act.

Luckily I'm happy to be wrong as long as it was for a good cause, and you have such a kind heart Debbie Ann.

If it is grasshoppers that are doing the damage, catch the little infidels and take them fishing. Bass & bluegill love them like candy;...Or, batter and deep fry them for some free protein. (Teriyaki sauce is my go-to seasoning)...some veggie fried rice and snap peas and you're good to go.