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Exploring the Effects of Fungicide Use on Corn Health and Microbiome

Corn is one of the most valuable cash crops globally, with annual grain production in the United States alone valued at nearly $80 billion. Fungicides are widely used to protect crops and promote yield, but research published in the Phytobiomes Journal suggests we may be overlooking a hidden cost: the loss of beneficial fungi essential to plant health.

A research team led by Briana Whitaker, a research microbiologist, and Joseph Opoku, a research plant pathologist, with the USDA Agricultural Research Service, in collaboration with Nathan Kleczewski (Syngenta Biologicals), investigated how foliar fungicides influence the foliar fungal endophyte community—the fungi that live within  leaf tissue without causing disease.

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R3 Corn Growth Stage Explained: Why Late-Season Tissue Sampling Matters

Video: R3 Corn Growth Stage Explained: Why Late-Season Tissue Sampling Matters

Corn pollination may be behind us, but the work isn't over.

In this field update from the Nutrien Innovation Farm in Champaign, Illinois, agronomist Tim Sickman discusses why growers should stay engaged with field scouting during the R3 (milk) stage of corn development. While favorable weather, strong pollination, and early grain fill are encouraging signs, important questions about crop nutrition and yield potential still remain.

Tim explains: What the R3 corn growth stage looks like

Why successful pollination isn't the finish line

The importance of late-season field scouting

How tissue sampling can identify nutrient deficiencies

The role of sulfur, zinc, potassium, and other nutrients during grain fill

Using tissue analysis to improve future fertility management plans

As corn moves through grain fill, understanding nutrient availability and plant health can provide valuable insights for maximizing yield potential and planning for next season.