Jarrod O. Miller, Extension Agronomist, email@example.com
Corn planted on April 24th in Georgetown has just hit the V15 stage, and we have observed the tassel folded up in the 17th leaf ready to emerge. Corn planted before April 24th should be at tassel and pollinating (Table 1), which may suffer during the heat wave this week. Track your fields by each week and watch the temperatures, then check those fields later for aborted kernels. Any corn planted after June 1st is either ready to sidedress or will be next week.
We are in a stronger warming trend with temperatures above the ideal corn growth range (Figure 1). Temperatures above 72°F at night are particularly troublesome during pollination. For the first time this season we have also seen a week with minimal to low rainfall across the state (Figure 2), which will exacerbate stress on corn during this time, so make sure you keep the irrigation going to protect your yield potential.
Table 1: Accumulated growing degree-days based on planting dates through June 18th.
If you planted
V6 = 475 GDD, V12 = 870 GDD, VT = 1135 GDD, R1 = 1400 GDD
Figure 1: Statewide temperatures since April 1st.
Figure 2: Statewide rainfall accumulation since April 1st.