It is unlikely to do for them completely, Pam. The nymphs have probably already made a comfortable home for themselves amongst your plants and are settled down waiting for the warmth of summer to lay more eggs. Many might die but enough will live on. You are talking about problems with whitefly this year - they are the ones that survived last winter!

Hmmm, ok. I've cleared all the strawbs away and the border that has the issue will get cleared. What is concerning me is the green manure I have planted in the veg patches (next to the infestation) may just become a home helping them through the winter! There really are dense clouds of them so I guess chemical treatment could be next.

And I have a rust attack all over my raspberies! it never rains but it pours lol.

Thanks,
Pam