Trident Maples/Chinese Elm

[xIIRevoEvoS]

So over this past couple of weeks or so, I noticed that my Trident Maple leaf are sort of wilting together or some sort bite marks and my Elm is starting to have full brown or part yellow leaves.
Is it natural for a Elm in this time of year to be changing colour from green to dark brown/part yellow green?
What about the trident, is it in the process of losing leaves because its close to Autumn?

[Naimul]

pictures would be helpful. how is your watering, because if they are wilting then turning brown/yellow then to me it sounds like a watering problem. bite marks could be another factor altogether.

[kcpoole]

My elms are in Full leaf and no signs of change.
They rarely change at all and most times do not go deciduous at all.

Ken

[Timothy]

Hi revoEvos. I had a fright about 3 weeks ago. My oldest elm ('91) suddenly threw off about 30% of it's leaves. I just noticed it one morning . When i touched a branch , leaves just dropped . We had a couple of very hot days , so i think it got too little water. (the soil dried out too quick?) . The leaves turned brown and yellow. I just kept up the water routine . (i could not dunk it , it's too heavey). It started pushing new growth about 10 days later . I checked for pests as well , but there was none.

[Josh]

When you say "wilting together" do you mean they are curled up and stuck together? If so I would be looking for a small green catapillar that glues the leaves together to create his home.
If you mean they are all just wilting then I would think watering is the issue or lack off to be precise. As mentioned a photo could help give a more accurate accessment. Also some more details ie. when was it last repotted? How long have you owned it? What mix is it in? Have you done anything different recently? I would be surprised if you'd be getting autumn color now.

Josh.

[bonborn]

So over this past couple of weeks or so, I noticed that my Trident Maple leaf are sort of wilting together or some sort bite marks and my Elm is starting to have full brown or part yellow leaves.
Is it natural for a Elm in this time of year to be changing colour from green to dark brown/part yellow green?
What about the trident, is it in the process of losing leaves because its close to Autumn?

I am also in the Northern suburbs of Sydney. My elms, tridents, pomegranate and liquid amber are doing the same. Has gone part yellow. I have a lot of liquidamber trees in my area and they are also showing signs of autumn. Leaves going red and yellow.

[kcpoole]

So over this past couple of weeks or so, I noticed that my Trident Maple leaf are sort of wilting together or some sort bite marks and my Elm is starting to have full brown or part yellow leaves.
Is it natural for a Elm in this time of year to be changing colour from green to dark brown/part yellow green?
What about the trident, is it in the process of losing leaves because its close to Autumn?

I am also in the Northern suburbs of Sydney. My elms, tridents, pomegranate and liquid amber are doing the same. Has gone part yellow. I have a lot of liquidamber trees in my area and they are also showing signs of autumn. Leaves going red and yellow.

We also have4 Liquidambar here as street trees and they are not changing yet. we also have lots of tallowood which turn even earlier and they have not started as yet either.
I use both as my "marker" trees every year.

We are only a few KM apart, and yet there is an appreciable difference in the environment.

Ken

[Jarad]

Too much sun possibly?

I had my Japanese Maples sitting in a spot that only gets Sun from 12pm-sunset, and the leaves weren't going green (stayed a reddish brown colour), moved them back into a morning only Sun spot, added some Charles C and seasol and within a few days all of the leaves turned green.

[xIIRevoEvoS]

Flowering Cherry - this link was how it was previously viewtopic.php?f=132&t=19438 and now the leaves show in the attachment went down during this week. Water drains quite quick and when I repotted into Colander today. The root system was so compacted that 3cm of the trunk was also made our of roots and tiny roots. Added Megumi Bonsai mix and seasol solution of 2 tablespoon with 4 water glass cup. Hope it wasn't under water.

Elm - had bits of green holes but you can see parts of the leaves being clean with a very thin sheet of 'cellophane' on leaf funny terminology, usual yellow/brown leaf that can be taken off quite easily

Trident - some are like burnt, some have darker leaves. some have bite mark like shapes.

Cotoneaster - Possible root bound?


No clue on whats going on and the ones without problems are Juniper Prostrata, JBP, Shimpaku Juni, other Cotoneaster, Hinoki Cypress, PJ Fig.

[xIIRevoEvoS]

Too much sun possibly?

I had my Japanese Maples sitting in a spot that only gets Sun from 12pm-sunset, and the leaves weren't going green (stayed a reddish brown colour), moved them back into a morning only Sun spot, added some Charles C and seasol and within a few days all of the leaves turned green.

Tridents should able to accept full sun and it only gets sun from 8-12pm from the side and the other part is near the carports edge get sun the entire day when I'm not at home. If its caterpilla related or some other bugs, I would like some recommendation on pesticide brands and other types of protection.

[shibui]

I cannot see bite shaped marks on trident leaf photos. There is some distorted leaves that may possibly be fungal problem but newer leaves are good so no need to treat them at this stage. Red colour in new levas of trident is normal. Do not worry.
Chinese elm leaf marks could be from something eating them but not enough damage to be worth using pesticide Leaves will not always be perfect - accept small amount marking, etc as normal. If you are really worried try a systemic like Confidor (or other insecticide containing Imidacloprid )
Cotoneaster looks consistent with lack of water which would tally with being root bound - the more roots in the pot the harder it is for water to penetrate so dries out more quickly.

None of these shows a fatal problem. I've seen trees do well with far worse.

[Naimul]

your chinese elm and trident maple look exactly like mine. im quite certain that the marks on the leaves on the elm is just water burns (thats what ive got it down to on mine.)

[trident76]

Tridents look pretty normal to me.
Chinese elm looks ok, maybe has had some insect damage but nothing to worry about.
That third thing that is out of its pot with no soil I would have already binned.

[Elmar]

That third thing that is out of its pot with no soil I would have already binned.

Based on what? It looks like he's just washed its roots... (Not picking a fight - looking to learn!).


Cheers
EZ
Via Tapatalk

[xIIRevoEvoS]

I cannot see bite shaped marks on trident leaf photos. There is some distorted leaves that may possibly be fungal problem but newer leaves are good so no need to treat them at this stage. Red colour in new levas of trident is normal. Do not worry.
Chinese elm leaf marks could be from something eating them but not enough damage to be worth using pesticide Leaves will not always be perfect - accept small amount marking, etc as normal. If you are really worried try a systemic like Confidor (or other insecticide containing Imidacloprid )
Cotoneaster looks consistent with lack of water which would tally with being root bound - the more roots in the pot the harder it is for water to penetrate so dries out more quickly.

None of these shows a fatal problem. I've seen trees do well with far worse.

I think my Trident is actually sick. Leaves are no the same quality to Megumi when I bought it from him about 2 months ago. I think it was a fungal problem, there are some black markins on the leaves and small light brown patch at the front of the leaf. Elm is ok now, number 1 culprit was moth catapillar. 1 large one was spotted during confidor spray.
Cotoneaster most likely root bound since water escapes way too quick but not a good time to repot at this time. Closer towards April/May