Shame on you for being too lazy to do a google search for "systemic
insecticide".

http://www.google.com/search?hl=en&l...q=systemic+ins
ecticide+definition&btnG=Google+Search


seepnezorf1 wrote in message
news:8MVva.818982$3D1.461701@sccrnsc01...
I'm in zone 6 and our guide books tell us that for taking care of lilacs
and
systemic insecticide must be used. What exactly is that and what makes it
different from a regular insecticide?