To control Nosema we may according to L. Bailey fumigate combs
with 80% acetic acid (100 ml acid pr box for one week). We have
used this method sucsessfully for several years. Due to hazard in
handling acetic acid, the commercial available acid is now 60%. Do
any of you have experience or references of the effect of 60%
acetic acid?
 
Knut Pedersen
University of Bergen
Norway