i use soapy water or you could use one of the many sprays in the garden centres, depending on your views about organic/inorganic sprays. but sawfly problems should be over soon. if you wantyou could just pick off any remaining caterpillars.

Soapy water isn't a good idea unless you are using a ecological soap product as it causes a build up residue in the soil.

I must say I mainly ignore it now. I have stopped fretting. I still get lots of goosegogs. I will pick off or squish any larva that I see.

satisfying in a gross way :o)

SBG I agree it is the simplest way... And very satisfying!

Thanks all - there do not seem to be any larvae on the plant just now so I cannot have the pleasure of immediate death, but was concerned about preventing another go next year. I will try the soapy water (ecological of course)