How much benzaldehyde for a fume board?

[Sutty]

I have some benzaldehyde and am considering using it with a fume board to clear supers.
How much will I need to clear national supers, anyone know?

 

[enrico]

Don't use it but this thread might help
https://beekeepingforum.co.uk/threads/bee-quick.47066/post-713168

 

[rolande]

Not on topic but Julian Johnstone, when he was working as an inspector, used to carry a selection of benzaldehyde soaked rags on a biscuit tin under the passenger seat in case of emergency. It certainly saved me from an even worse stinging in the middle of an apiary of 20+ ferocious colonies when my boot lace came undone -believe me, there was quite a clump of bees hanging on till he administered one of the rags.