It would have been ideal to choose an initial decay area
. However, since the instrument microprocessor was not able to handle two regression fits, it was decided to work with the Mooney torque at 0.6 s after relaxation start, [M.sub.0.6], which is the shortest relaxation torque reliably displayed by the instrument.
The decay index was evaluated visually by means of a five-grade scale according to decay area
, where 0 indicates no decay area
of the fruit surface; 1 indicates decay area
< 25% of the fruit surface; 2 indicates decay area
between 25% and 50% of the fruit surface; 3 indicates decay area
between 50% and 75% of the fruit surface; and 4 indicates decay area
> 75% of the fruit surface.
Cherries are normally dark in color, so decay areas
are often inconspicuous.