Like everyone it seems, I'm overwhelmed by greenfly and whitefly. I tend to only use soap spray (made with washing up liquid) on the roses, as I like to leave the rest for the birds/insects. However I'm now getting overwhelmed with them, particularly in the greenhouse.
Is there anything that won't stand up to a spray with the soap? They're mostly on my tomatoes, lemon tree and aubergines...it's these I would like to spray.
Thanks in advance!