Net weight gain in hives (Pennsylvania).

Total weight gained by the hives in the different treatments corresponds mainly to amount of honey collected. The difference between the weight at the start and the end of the experiment (4 months) shows that the non infected controls (mean = 23.5kg) and the Remebee-I+IAPV (mean = 21kg) made significantly more honey than hives receiving IAPV alone (mean = 16.3kg) (F = 2.7; df = 4.92; P = 0.034).