In our region they are using Imidacloprid to "defend" against Emerald Ash Borer. Suggested application is every year to every two years. Richard Stewart Carriage House Farm North Bend, Ohio An Ohio Century Farm Est. 1855 (513) 967-1106 http://www.carriagehousefarmllc.com [log in to unmask] *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Access BEE-L directly at: http://community.lsoft.com/scripts/wa-LSOFTDONATIONS.exe?A0=BEE-L