Pioneer Full-Season Corn (P1197AM family)

Full-RM Pioneer hybrids match the long Corn Belt Core season for maximum yield potential. Iowa State and Illinois Corn Performance Trials test multiple Pioneer hybrids in this maturity band annually — read the current year's report for verified head-to-head yield data.

Tar spot pressure has built rapidly across Iowa, Illinois, and Indiana since 2018; Pioneer's tar-spot tolerance varies by hybrid and growers should request the specific hybrid number's tar spot rating from their dealer. 111+ RM hybrids north of Highway 30 in Iowa face frost risk in cold years.

Full-RM hybrids fit the long Mid-Atlantic South season; gray leaf spot tolerance is increasingly important here as humidity supports persistent disease pressure. Pioneer maintains an active hybrid lineup tested in Virginia Tech and Maryland extension trials.

Southern rust pressure can be severe in wet years on the Coastal Plain — verify the specific hybrid's southern rust rating before planting in eastern Maryland, Delaware, or eastern Virginia. Sandy Coastal Plain soils require higher seeding rates and irrigation to express full-RM yield potential.