Why do you feel you need any kind of insecticide for lilacs? They are one
of the most carefree shrubs around. I am also in zone 6, and on old
farmsteads you can see neglected lilacs that have grown into huge healthy
specimens that bloom freely. I've never noticed any insect infestations of
any kind on my own lilacs. Please don't spread chemicals around
indiscriminately.

I'm curious as to which guide book is making this recommendation. Is it
published by Ortho?

Sue

Zone 6, Southcentral PA

"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?