What grows on live tree leaves?

pjf at uoguelph.ca pjf at uoguelph.ca
Fri Sep 12 13:42:09 EST 1997

In this area, in late summer, I notice some trees have lower leaves that
are covered in "white powder".  I suspect control is next to impossible
(Collecting and disposing of fallen leaves may slow it down).  Are there
many species involved (I see maple, lillac, and others infected)?  The
affected tree seem to be doing fairly well (haven't died yet).
 /PJ   "You can't grep dead trees"  pjf at uoguelph.ca  (519)824-4120x6309

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