Yellow Poplar w/ spots

[okietreedude1]

First off, my apologies for the large file. I dont know how to make them smaller.

This is a pic of a leaf from a yellow poplar (tulip tree). It is in its second growing season and late last summer developed the same spots it now has. We have very few of these trees around so Im looking for some help.

What are the spots? How does one treat them?

 

[guymayor]

no can open pic file. We have lots of liriodendron here but foliage spots are rare..

 

[120770]

If you have Irfanveiw on your computer you can resize real easy...

Couldn´t open up this file either, pics wise

Scotty

 

[SirTreeRat]

Sorry can't see any pic ethier. Are the older leafs turing yellow? Are the spots brown and between the veins. Also check to see if the soil is dryed out around the tree. If so, I'm think maybe (summer leaf yellowing) Young or new trans are susceptible during hot, dry summers. If this is yellowings you need to water, water, water.

 

[professor]

Are the spots yellow or black, tar spots affect mostly maples but do affect tulips.

 

[professor]

Can't open the file, did they form recently. Might be Cristulariella leaf spot, which are favored by cool wet weather in mid summer, most noticeable on lower branches. Normally it will be retatared by weather flucations.

Summer leaf yellowing is a problem in the east, during hot spells.

Most leaf diseases are treated in the spring during leaf emeemergence. some degree of control can be applied later in season, once infected, not much you can do.

 

[okietreedude1]

Sorry guys, dont know why the file wont open. Im going to be close there here in a bit and will take a pic of the tree and repost.

 

[SirTreeRat]

okie dokie

 

[KCGuy]

Okietreedude,
Look in Johnson and Lyons book... they refer to the leaf spot as physiological. We get it when we have really hot, dry spells. Evidently the tuliptree makes dots instead of marginally scorching.
Shouldn't be anything more than aesthetic, anyway.