Early-season growth responses of corn hybrids and inbred lines to a commercial seed treatment

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2020-05

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The Ohio State University

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Abstract

Annual rainfall in the Midwest has increased up to 10% since the early 20th century, while approximately 20-25% of the global corn crops have experienced yearly drought. Climate variability has increased demand for research on how management practices impact crop growth. In 2019, an open-air pot study was conducted in central Ohio to assess how a commercial seed treatment (Poncho 1250 + VOTiVO) would impact early-season above- and below-growth of corn (Zea mays L.). Two recombinant inbred lines and two commercial hybrids were selected, with each corn line treated with clothianidin + Bacillus firmus I-1582 (Poncho 1250 + VOTiVO) or untreated prior to planting. Seed treatment had a positive effect on growth staging, plant height, and root surface area at termination. However, root porosity was unaffected by seed treatment aside from one commercial hybrid where porosity decreased with seed treatment. Application of Poncho 1250 + VOTiVO improved early-season growth of seedlings, but more research is needed to understand its impact on improving crop tolerance to early-season abiotic stresses.

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early season responses, root cortical aerenchyma, Zea mays, corn, seed treatment

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