I have some citrus trees with scale bugs, they are kept as house plants and live outside during the warmer months. They've been sprayed (regrettably) with a pretty nasty pesticide. It's called Bug Clear Ultra and Acetamiprid is listed as being the chemical. (I don't want to use that spray again, but used it under duress).
My question is whether the fruits are edible given they've been sprayed with nasty chemicals (Acetamiprid). Having read the container again (see picture), it gives a guide to 'latest application before harvest', which is some help. Though further reading info provided by the University of Hertfordshire reveals that this is a neonicotinoid and that it can cause skin irritation (scroll to the bottom of the link for a summary of this). I'm still rather unsure whether I can use the fruit or whether it could possibly be harmful.
I'll try out the organic methods next time (mentioned in the RHS link I've provided), does anyone have successful experience of using organic treatments?
EDIT - to add detail following Bamboo's points
While fruitlets were present? Yes.
While the flowers were there? Yes.
Second, can you add a photo showing the extent of the scale infestation, or say whether it is on the leaves as well as on the wood. I don't have a photo of this yet, but there are still scale insects on the leaves. I noticed found one or two on new leaves as well, although I believe I sprayed at the right time; I read somewhere that there is a most effective time to spray, according to the beasties' lifecycle. Perhaps the treatment isn't 100% effective in any case.