Understanding and Mitigating Arrested Ear Development in Corn: A Key to Maximizing Crop Yield

Arrested ears, a type of abnormal ear development in corn, have become a significant concern for farmers in Ohio due to their detrimental effects on crop yield. These ears undergo interrupted or premature growth due to external factors, resulting in reduced productivity. To address this issue and maximize corn production, it is crucial for Ohio farmers to identify the root causes and implement targeted solutions to mitigate the occurrence of arrested ears.

One prominent factor contributing to arrested ears is the application of nonionic surfactants (NIS) during critical growth stages, such as the ear size determination period from V6 to V12, and up to V16. Researchers have found a correlation between the timing of pesticide spray applications containing NIS and the occurrence of arrested ears. It is crucial to avoid NIS applications during sensitive developmental stages (V6 to V18) to prevent this phenomenon.

Accurate crop growth and development tracking is essential to avoid untimely applications and potential issues. The leaf collar method is recommended for staging, with the split-stalk technique being useful at later vegetative stages. By ensuring proper staging and avoiding NIS applications during vulnerable periods, farmers can minimize the risk of arrested ears and other ear abnormalities.

Abnormal ears, including arrested ears, result from a complex interplay of susceptible hybrids, environmental conditions, and management practices. Unfavorable conditions during the growing season can impede ear formation and negatively impact yield and grain quality. Understanding this "expression triangle" can guide farmers in making informed decisions to prevent abnormal ear development.

Continued research and close monitoring of crop growth and development are crucial to gaining a deeper understanding of the complexities surrounding abnormal ears. By adopting proactive measures and leveraging knowledge, farmers can optimize corn yield and mitigate the detrimental effects of arrested ear development on their crops.

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