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Characteristics Of Late Maturing Corn (08/08/13)

The recent period of cooler than normal weather has heightened concerns that this year’s corn crop may not mature before the first killing frost.

Characteristics Of Late Maturing Corn

The recent period of cooler than normal weather has heightened concerns that this year’s corn crop may not mature before the first killing frost. Corn development can be tracked closely using corn growing degree days (GDDs). Currently GDDs are running behind the long turn average, but not by too much. In fact, the date when 50% of the corn crop was reported to have silked this year, July 28th, is close to the 5-year average date for this developmental stage. Nevertheless, the recent below average temperatures are slowing corn development significantly and so there is justifiable concern about the corn crop maturing late this season, particularly for fields that were planted late. The following table relates calendar days and GDDs to corn kernel development and yield in general terms. The ranges listed below are fairly large in order to take into account variances in temperature within the state and in the relative maturities of the hybrids grown.

ransom.corn_growth_stage_and_calendar_days_and_GDDs_to_maturity.png

Joel Ransom

Extension Agronomist for Cereal Crops

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