Hi, I have been following this thread and the last with interest as I am also suffering heavily from various caterpillars and sawfly larvae. (The bu**ers didn't manage to get my gooseberry bush for the first time ever though!!! Woohoo!)
They have even munched through my kale, nasturtiums, beans, peas, caulis, and even some of my herbs, I will be definitely be trying the rhubarb spray next year!!! I felt awful about spraying them ( I deport my slugs rather than squish them

) But I think my time of being soft hearted will have to come to an end because I am now losing more than I am growing at the mo
Will have to be more vigilant!!