Thank you. I searched for hydrogen peroxide and located the post. The pictures in the post were much better than mine and it definitely looks like my problem. I will wipe with H2O2 and see what happens. Any other advise would be appreciated. I posted a new picture in the original post and am including another one here. I don't know how to post multiple images. This plant came in this condition. Two others are just starting to develop the white spots. I really hope this is nothing. I have been googling plumeria diseases all morning and have not found anything like it. Thanks again. Joan

This is most interesting.It's just come to my attention on another forum that there are some species being affected in this way including maples,in particular Acer Campestre.There is speculation of sun damage and even protection against browsing animals but no-one seems sure what's the cause. Sorry I don't know the answer but good luck,we'd all like to know what's going on :)

Heh, I've been known to get into enough semantical tangles here, I'll just say, I know all too well the definition of the word weed as any unwanted plant. Yes, I get that. I just don't happen to agree. I think weeds are first of all, non-native plants, usually herbaceous or grasses, which arrived in this continent with agriculture. So, whoever planted the first wheat or whatever early crop, likely brought seed from Europe and that seed-as do most batches-had foreign material in it consisting of the seeds of various species that have since gone on to populate every disturbed corner. And that disturbance is a key component to what in my world are weeds.....species that actually require the constant disturbance that is farming (or construction projects) to take hold to any extent. But that's just me and a few others. Everyone's got their own definition. Our former golf course guy used to say that the trees on the course were just "hard weeds". He was a funny guy. +oM

where are you ... did you have drought this year??? i am NEVER concerned by about october.. about what leaves look like on a deciduous tree ... and even earlier.. if i had a drought/heat wave for most of the summer ..like i did in my part of MI ... look for disease in early to mid summer ... that is when you MIGHT want to worry about it ... as the leaves shut down... they can be attacked by all kinds of things ... so its hard to use such to define any problems ... besides ... even if you could ID something.. you wouldnt go spraying a leaf that is going to fall off soon enough ... about all you can do .. if you insist on doing anything ... is cleaning up all the leaves.. so they arent there in spring to cause any problem ... ken