Horse Chestnut Browning

[daveatdave]

drought stress all the chestnuts i have seen are going over now a bit Early but most trees are shedding leaves and some limbs at the moment all through drought

[Andrew Gale]

Looks very much like Guignardia aesculi - Horse chestnut leaf blotch to me.

 

I was always under the impression Horse chestnut leaf miner appears between the leaf veins.

[RobRainford]

Looks like drought stress to me too. Leaves do look a little small overall?

 

For reference, Effects of Cameraria ohridella - leaf miner, attached.

 

[Paul Barton]

And this is Guignardia aesculi leaf blotch - also different from what you are seeing. As Chris said, you normally get some yellow panes around the darker brown blotches with this.

Edited August 7, 2014 by Paul Barton

[crobinson]

Looks like drought damage to me.

Leaf miner is as the pic above - much more blotchy and obvious where they have attacked.

Few trees suffering drought damage this year - a number of concerned landowners reported Ash Dieback which is just drought caused leaf drop.

[colemanjessenz]

Here's some photos I've taken today of some affected horse chestnuts , all next to each other

 

 

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[atree]

pretty healthy compared to the one's here..