Kanza, 14 Oct 2013 |
The photo at left shows the normal progression in shell color development. When the shuck first separates from the shell the sutures are still tightly closed. At this point, the shell is mostly white but marked with the characteristic black speckles and streaks. The first indication of shuck split occurs when a small opening develops at the apex of the nut. As fresh air reaches the shell it oxidizes and begin to turn brown in color (2nd and 3rd nuts in the progression pictured above). As the shucks split downward, from apex to nut base, more air surrounds the shell causing the development of natural shell color. Finally, when shucks are split wide open and the nut inside becomes fully colored.
Maramec, 14 Oct. 2013 |
Kanza seems to be about 10 days later than normal. If Maramec is also 10 days late we'll need freeze-free weather into early November to see shuck split.
I cut into the shuck of a Maramec nut and found no trace of shuck separation at this time (photo at left). The amount of scab on this nut should not impact normal shuck dehiscence so, if and when, Maramec splits open we should be able to record that date.