Note that corn plants are protected by a naturally produced feeding deterrent prior to an extended leaf height of at least 16 inches so no treatment would be indicated for plants younger than this stage. V6 V12 V17 Mid-ear kernels with a milky white fluid content. Mid-ear seed coats are yellow.
Silks are have just become red to brown.
Excessive rainfall in the springtime often restricts planting at a critical time. However, this spring maximum provides a useful recharge of the soil's water holding capacity. Fall precipitation may delay harvest. Mid-season clear skies may result in stress during pollination but they also contribute the abundant, uninterrupted solar radiation necessary to produce the high corn yields typical of the U.S. Midwest. Low temperatures early and late may restrict season length and therefore yield potential.