The Cause & Effect of Greensnap

Greensnap can occur during two of the most rapid vegetative growth stages of corn from V5 to V8 and from V12 to R1. During a corn’s rapid growth stage, internodes elongate and become susceptible to breaking off. From V12 to R1, a corn plant can grow up to 4 inches per day!

When greensnap occurs, it happens at the primary ear node which is detrimental to corn yield in the fall. Aside from high winds, other factors can include planting conditions, farm management practices and genetics of the corn plant.

When corn plants are in their first stage of rapid growth from V5 to V8, post-emergence herbicide is often applied. Growth-regulator herbicides can play a negative role in the integrity of the plant structure for short time after application. This combined with rapid plant growth weakens plant structure leaving it susceptible to greensnap.

Here are three suggestions to manage for greensnap in future crop years:

  1. Choose hybrids that have strong plant characteristics. We suggest selecting hybrids with above average root strength, stalk strength and disease resistance.
  2. Take a second look at your herbicide management plan, specifically time of application or reduction of growth regulator herbicides.
  3. Set your corn crop up for success from the beginning of the season by planting into a favorable seed bed at the appropriate seed depth. Give the seed a chance to establish a strong nodal root system to help withstand harsh weather through the growing season.

If you have questions on selecting the right hybrid for your field, let us know. We can connect you with one of our product specialists to ensure the right seed is placed on the right acre. This is the first step you can do to protect your corn crop from greensnap.