Western Bean Cutworm's Effects on Corn Silage Quality Revealed

The Northern New York Agricultural Development Program (NNYADP) has released groundbreaking findings on the influence of Western bean cutworm (WBC) damage on the nutritional composition of corn silage, a vital feed for dairy cows. This research, which explores a previously understudied correlation, sheds light on the significant consequences of WBC infestations in northern New York corn crops.

Conducted by forage agronomist Allen Wilder from the W.H. Miner Agricultural Research Institute, the study examined two corn hybrids, differing solely in their genetic insect damage-protection traits. One hybrid incorporated VIP3A endotoxin to resist WBC damage, while the other did not. By comparing silage yield and 25 quality metrics, Wilder evaluated the impact of WBC damage on corn silage under local conditions.

The trial revealed alarming results, with over half of the susceptible plants showing signs of WBC infestation in the ear tips. The corn hybrid equipped with VIP3A endotoxin exhibited minimal feeding by WBC larvae. However, the damaged corn displayed significantly higher levels of mold colony-forming units due to ear tip feeding, which may lead to undesirable microorganism populations in silage.

The damaged corn yielded nearly two tons less of as-fed silage per acre compared to its undamaged counterpart. While aerobic stability differences were not immediately noticeable, the study highlights potential implications for cow performance and palatability.

For complete project details, visit the NNYADP website under "NNYADP Projects by Year: 2022" at [insert link]. Farmers can also track pest activity, including Western bean cutworm, through the Weekly Field Crops Pest Report updates provided by Cornell University IPM Field Crops and Livestock Coordinator Kenneth Wise at [insert link].

These findings from NNYADP's research provide crucial insights into the detrimental effects of WBC damage on corn silage quality, emphasizing the importance of proactive pest management strategies for optimal livestock nutrition and farm productivity.

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