Corn sprouting on the ear — kernels germinating while the crop still stands — is the signal to scout fields immediately and rework the harvest queue, agriculture.com advises.

The advisory headline is blunt about the practical consequence: when vivipary shows up in a standing corn crop, the order in which fields come off the combine should no longer follow the original plan. Fields showing sprouting move to the front of the line.

What is sprouting on the ear?

Sprouting on the ear, also called vivipary or premature germination, occurs when kernels break dormancy and begin to grow before harvest. The visual cue is unmistakable: small green or yellow shoots emerging from kernels still attached to the cob.

It typically appears when mature or near-mature kernels absorb moisture while still on the ear. Warm, wet conditions after the crop has reached physiological maturity create the risk window. Kernels that have dried down and then re-wet are most vulnerable.

Why does it change the harvest decision?

Sprouting is a quality problem before it is a yield problem. Germinated kernels contain damaged starch and have begun consuming the very energy reserves that grain buyers pay for. The result is reduced test weight, lower quality grades, and greater difficulty storing the grain without spoilage.

That quality degradation is the reason the advisory singles out harvest order. A field with visible sprouting will not improve while it stands — every additional wet cycle can extend the damage. A field that is mature but dry and un-sprouted can often wait.

Scouting is the mechanism that makes the reorder possible. Without walking fields and pulling ears to check, growers triage by habit, calendar or planting date rather than by actual condition.

What should growers do now?

The advisory's core instruction comes down to a sequence:

• Scout each corn field and inspect ears directly for sprouting kernels
• Rank fields by visible sprouting and moisture condition, not by original schedule
• Prioritise sprouting-affected fields for immediate harvest to limit further quality loss
• Separate affected loads at harvest where quality differences between fields are significant

Growers should also check kernels at multiple points in the field, not just headlands, since moisture and maturity variation within a single field can produce patchy sprouting.

What should farmers watch next?

The key variables are moisture and maturity. Fields at or near black layer that then take rain are the candidates to inspect first. Once sprouting is confirmed, the watch item is the weather window: drier conditions slow further germination, while repeated wet cycles accelerate it. Growers who see sprouting should also anticipate dryer and storage challenges with affected grain and plan to move it quickly rather than store it long term.