Christmas Tree Ornaments or Arrested
Bob Nielsen, Extension Corn Specialist,
Department of Agronomy, Purdue University
Following a rash of reports from 2007 that
blamed the occurrence of arrested
ears in corn on foliar applications of fungicide prior to tasseling,
of us at the Purdue Crop Diagnostic Training & Research Center
set out to
reproduce the symptoms in a preliminary trial at the Agronomy Farm
Lafayette in 2008. The upshot of that trial is that we indeed were
reproduce the symptoms. The surprising result was that the problem
caused by fungicides, but rather appears to be related to physical
the developing ear shoot by absorption of one or more spray adjuvants.
For "the rest of the story", see the online
summary at http://www.kingcorn.org/news/articles.08/ArrestedEars-1209.html.