Farming systems in the Northeastern U.S. are diverse, with a significant portion of the crop acreage
used to support livestock, poultry and dairy industries in the region.
Often many farms grow corn following corn as part of a dairy rotation or
because of the high demand for corn and positive corn basis in the
region. Some soils in the region are subject to occasional periods of
drought which can exacerbate the effects of corn rootworm injury.
These factors have resulted in considerable demand for the transgenic corn
rootworm hybrids in region. Field sizes are small, resulting in less efficient
fieldwork. Dairy producers often have less time for fieldwork and sometimes
double crop corn following hay. These factors result in later planted
corn fields that often experience more severe corn borer injury and have more
potential for Bt corn borer hybrids. In some
areas of the Northeast, service from custom applicators for weed control is
limited. In these areas, glyphosate tolerant
corn has gained acceptance because of the simplicity of herbicide programs,
ease of application by dairy farm operators, the reduced potential for crop
injury due to delayed post emergent applications, and the lack of glyphosate tolerant soybeans in crop rotations. Yield
and economic responses to transgenic corn hybrids in the Northeast have often
shown that they can be justified in the appropriate environments and this has
led to widespread adoption. As newer, multiple gene, stacked products
begin to be more common, the economic and integrated pest management
perspectives of the use of these products is becoming more complex.