lilac leaf curl - what is it and how to treat it?

hallo,
bought lilac last year, it had two flower spikes then developed leaf curl - see picture. is it normal or should i treat it with something?
thanks
karaman
+-------------------------------------------------------------------+ |Filename: lilac_curl.JPG | |Download: http://www.gardenbanter.co.uk/attachment.php?attachmentid 765| +-------------------------------------------------------------------+
--
karaman


Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
On Sat, 10 Aug 2013 07:29:45 +0200, karaman

Could be over-spray of some defolient.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.