8.4.1. Correction of the mortality rates

The mortality ratio is corrected on control mortality with the Henderson-Tilton formula.


   If the parameter comprises live individuals and uniform numbers of bees per treatment (test and control), the Abbott formula is used.


   If the parameter comprises mortality ratios and a uniform start, the Schneider-Orelli formula should be applied.


Tb = number of live bees before treatment
Ta = number of live bees after treatment
Cb = number of live bees in control before treatment
Ca = number of live bees in control after treatment
b = ratio of dead bees in treatment
k = ratio of dead bees in control Example correction for control mortality