8.4.1. Correction of the mortality rates

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

equation01

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

equation02

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

equation03

Abbreviations:
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


8.4.1.1. Example correction for control mortality