MissS, thank you very much for info.
I will be resorting to hand picking, they seems to be slower in the morning.
Funny to read "cosmetic" damage only, it is what my perennial gardens are for.
I have asked Arbico organics for possible use of assassin bugs and pirate bugs which they do have.
I will also remove two bushes of forsythia which I have in that bed and clear up all plant stalks which usually left to overwinter.
For leaf damage I have successfully used foliar mixes from Smiling gardener, it seems to help repair it much faster
http://www.smilinggardener.com/sale/calculator