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SUMMARY

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eturn to table of contents PIONEER PREMIUM SEED TREATMENT PERFORMANCE IN THE MID-SOUTH by Greg Pfeffer, Field Agronomist, and Dan Poston, Ph.D., Agronomy Research Manager BACKGROUND • Seed treatments are commonly applied to soybeans grown in the Mid-Southern U.S. OBSERVATIONS • Seed treatments protect planted seeds from various types of soil- and seed-borne seedling diseases. • Seed treatments can improve stand establishment in challenging conditions, thereby reducing the likelihood of replants that negate the value of early planting. • Growers continually look for newer seed treatments that improve seed emergence, stand establishment, stand uniformity, and yield, especially under challenging conditions like early planting. • Pioneer Premium Seed Treatment (PPST) offerings may deliver better emergence, improved early growth, and higher yields under challenging conditions compared to other competitive seed treatment offerings. OBJECTIVES • Visually assess the effects of PPST and CruiserMaxx ® seed treatment on soybean seedling emergence and stand establishment in the Mid-Southern U.S. using a variety of soil types and production systems. Soybeans treated with PPST (left) versus CruiserMaxx seed treatment (right) planted following rice. • Compare soybean yields with PPST and CruiserMaxx seed treatment using a variety of soil types and production systems. STUDY DESCRIPTION Plot Layout: Treatments: Non-replicated split-planter strip trials PPST CruiserMaxx seed treatment Pioneer ® Brand Varieties: Variety/Brand 2 P47T36R P47T89R Years (Locations): 2014 (6) 2015 (14) Data Collected: Visual observations Yield PPST (left) versus CruiserMaxx seed treatment (right) on the low end of field. 150

eturn to table of contents RESULTS 75 PPST CruiserMaxx Yield (bu/acre) 70 65 60 55 72.0 70.1 50 Soybean Seed Treatments Pioneer ® variety P47T89R treated with PPST 24 days after planting on Sharkey clay. Figure 1. Soybean yields with PPST and CruiserMaxx seed treatment across 20 locations in 2014 and 2015. 80 PPST CruiserMaxx Yield (bu/acre) 75 70 65 60 55 77.7 74.9 50 Soybean Seed Treatments Figure 2. Soybean yields with PPST and CruiserMaxx seed treatment across 14 locations in 2015. Pioneer ® variety P47T89R treated with CruiserMaxx ® seed treatment 24 days after planting on Sharkey clay. Pioneer ® variety P47T36R treated with CruiserMaxx seed treatment (left) and PPST (right), 42 days after planting. SUMMARY • Across all 20 locations in 2014 and 2015, soybeans treated with PPST had an average yield advantage of 1.9 bu/ acre compared to soybeans treated with CruiserMaxx seed treatment. • In 2015, soybeans treated with PPST had an average yield advantage of 2.8 bu/acre compared to soybeans treated with CruiserMaxx seed treatment across 14 locations. • The yield advantage for soybeans treated with PPST was greater in 2015, which generally had earlier planting dates, greater rainfall, and cooler temperatures compared to 2014. • PPST value was maximized under more challenging emergence conditions. • Soybeans treated with PPST exhibited better earlier growth when compared to soybeans treated with CruiserMaxx seed treatment at several locations. 151

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