We get confronted with a study from New Zealand by Ron van Toor quite often: “Can chelifers be made to control Varroa mites in beehives?”
The study is called originally “Ingestion of Varroa destructor by pseudoscorpions in honey bee hives confirmed by PCR analysis“.
This study proves two things impressively :
1. Book scorpions migrate from conventional beehives
2. The book scorpions suck out Varroa mites in the beehives
However, it is quite possible that book scorpions only suck out mites which have already fallen naturally and which were no longer available to the reproduction cycle anyway. This study is neither proof of nor against the effectiveness of the book scorpions in the fight against Varroa mites.