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Know What Caused Uneven Emergence in Your Corn Fields

January 3, 2011
By: Margy Eckelkamp, Farm Journal Machinery Editor and Test Plot Director

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One farmer asked, “How can I figure out what caused some of plants to mature later than others?” Farm Journal Associate Field Agronomist Missy Bauer answers this question in episode 10 of Corn College TV.

“At mid-season you can still do some in-field investigation of why some plants are behind in development than others,” Bauer explains. “Pay attention to uniformity of stalk diameter. Skinny plants indicate later emergence.”
According to Bauer, late emergence can be caused by:
·         Uneven planting depth,
·         Residue pinched in seedtrench that would have avoided seed to soil contact,
·         Insect damage – white grubs or wireworm,
·         Remnants of seedling blight diseases which is easier to diagnosis earlier in the season but you can still look at health of mesocotyl and seed roots
It’s important to know the cause for delayed emergence. You can’t recover the yields loss by delayed plants this year, but you can avepisode10 askanagronomistoid it from happening again in the future.

Learn more about scouting mid-season in episode 10 of Corn College TV.

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