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Well, the heat and lack of rain have finally caught up with our
field. Even though it's only about 11:00 AM the plants don't have that
nice crisp, turgid appearance. This drought, combined with the heat
will likely cause some yield losses. Kernels will not develop normally
and they will be lighter.
The back of the head including the bracts is almost completely yellow now. This plant is in late R8 or early R9 stage of maturity. When the bracts are brown it will be in the R9 stage, which is physiological maturity. I don't see any Rhizopus head rot damage.
This is a cross section of the head we were just looking at. You can see the brown areas across the head where head moth larvae have been burrowing. It appears to be a little more severe on the left side.
This is a closeup of the left side. There's considerable burrowing and
damage. I'm surprised there's not more