If this is true in real trials, it is a big thing. Varroa mites have developed resistance to fluvalvinate, which is most commonly used miticide and formic acid

If this is true in real trials, it is a big thing. Varroa mites have developed resistance to fluvalvinate, which is most commonly used miticide and formic acid is really easy to overdose. Lithium cloride in those quantities is quite safe and low cost. Even more, with short treatment duration (48h at 25mM concentration) one can time the treatment well to reduce LiCl ending up in the honey.