What's wrong with this Sycamore

[Richy007]

Hi all

Brand new here and not a tree expert. I have a large Sycamore on my property which has just this year started shedding leaves in May. A lot of the lower branches have leaves that a turning brown, shrivelled and dieing.  Upon inspection of fallen leaves, they all seem to have brown spots, are being around the edges and have small white fluffy spores (or something) on the underside. 

 

Can anyone help or identify what this might be??

 

Thanks in advance.

[richyrich]

They look like aphids/larvae of some kind...

 

[petercb]

Tney aren't spores but insects, photo 4 shows two clearly. Not sure what they are but this looks similar

 

Master Gardener: What can I do about tiny pests plaguing my orange tree? – Press Enterprise

WWW.PE.COM

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Also, is the white flower in my garden a pest, and what is up with earwigs this year?

 

[Dan Maynard]

Aphids yes, pretty common on sycamore IME and not usually much of a problem except the sticky dew they drop. The tree doesn't look too bad overall, maybe just drought?