> You don't have to go to India to get Neem oil
 
In Veracruz (where I live), Mexico Neem is grown everyplace, it is a 
common bush and some cattle raisers sometimes use it to control ticks 
and arthropod predators. I think they boil the leaves, and then use the 
liquid "sprayed". I don´t know if it works for them.
 
I thought about Neem and varroa while thinking about all what is needed 
to use formic acid: gloves, mask, separate sealed and open brood, put in 
a sealed chamber, etc. I don´t think it is a friendly substance and it 
works. So, I thought...maybe Neem could be another alternative, but at 
least (as far as I see) it´s a lot to read and to experiment ahead 
before it gets (if it does) a real alternative.
 
Thanks for your comments and special thanks to Allen for being so kind,
 
Tere