How to Grow Pioneer Hybrid Corn P1647AM

Seed germinates below soil and first leaf (coleoptile) emerges through soil surface; seedling appears as a single upright shoot with narrow, light green leaf.

Ensure soil moisture is adequate; soil temperature should be 50°F minimum, ideally 60°F+ for faster emergence. Protect young seedlings from cutworms and soil-dwelling insects.

Plant develops 4-8 visible leaves; root system expands rapidly; plant establishes strong anchor roots. Stem thickens and plant grows 12-24 inches tall.

This is a critical period for weed control; apply herbicides if needed before V8 stage. Monitor for insect pests (cutworms, armyworms). Ensure consistent water availability. Side-dress nitrogen fertilizer if soil nutrient levels are low.

Plant enters rapid growth phase, reaching 3-6+ feet tall depending on variety and conditions. Tassel (male flower) forms inside whorl but not yet visible. Leaf area index increases dramatically.

Maintain adequate soil moisture; this stage is moderately sensitive to water stress. Monitor for European corn borers and other mid-season pests. Avoid mechanical cultivation that might damage shallow roots.

Tassel emerges and sheds pollen; silks emerge from ear and become receptive. Pollen travels on wind to pollinate silks; successful pollination results in kernel development.

Water stress during this critical period severely impacts yield; maintain consistent moisture. Avoid any stress (pest damage, nutrient deficiency) that might reduce kernel set. Monitor for diseases like northern corn leaf blight.

Kernels develop from pollinated silks; they progress from milk stage (R3) to dough stage (R4) to dent stage (R5) to physiological maturity (R6). Kernels change from light green to yellow and develop characteristic dent at tip.

Continue monitoring for late-season diseases and pests. Reduce water stress if possible but avoid overwatering. Plant naturally senesces; leave in field until moisture content reaches 15-20% for grain harvest or 60-70% for silage.