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Information on our nuc production yards and how we approach varroa mite treatments.
Anything over a 1% infestation gets our attention.
Video correction: at 3:42 the bottom line is 100 bees.
Reference:
Keith S Delaplane & W Michael Hood (1997) Effects of delayed acaricide treatment in honey bee colonies parasitized by Varroa jacobsoni and a late-season treatment threshold for the south-eastern USA, Journal of Apicultural Research, 36:3-4, 125-132, DOI: 10.1080/00218839.1997.11100938