Raspberry beetle

Hi can anyone help?
I had a real problem with raspberry beetle last year but left it too late to spray.
What is the best pesticide to use so that my raspberries are still edible and with limited harm to pollinators? Also when should I spray? Last year I didn't discover them until the fruit was completely infected and understand the larvae may be dormant in the ground around the existing plants.

Thanks
RachL

 

Welcome to Gardeners Corner

Pyrethrums probably your best organic bet, you can gget traps for them but i've never used them so don't know how effective they are