Katsura with some ugly leaves

[deadcs]

Hello, i have a katsura with a general healthy aspect but some of its leaves look like this:






The tree is in full shadow.
Do you think it can be any kind of fungus?
to much watering?

any ideas?
Thank you!

 

[0soyoung]

I have no idea what causes the lighter colored leaves, but I am pretty sure that it isn't fungal.
The brown tips look like the foliage was sprinkled and retained on the tips. You could simply remove these leaves by cutting their petioles, if the appearance bothers you. If it is a persistent nuisance, try to avoid sprinkling the foliage late in the day.
But, of course, it isn't always possible, in which case you could spray a solution of 2 tablespoons of 3% hydrogen peroxide (from the grocery/pharmacy) in a quart of water (nominally 900 ppm, or about 0.1%) afterward. This will prevent more leaves from having it, but it will not change leaves that have already browned.

 

[Canada Bonsai]

It is normal for katsura to have lighter colored leaves on the extremities of its branches. It is a natural and welcome summer-time feature of the cultivar!

 

[deadcs]

Thank you very much for your coments!