Monday, November 13, 2006 - 10:20 AM

Incorporating Transgenic Crops into Farm Systems in the Northeastern US.

Gregory Roth, The Pennsylvania State Univ., 116 ASI Bldg.-Dept. of Crop and Soil Sciences, University Park, PA 16802-3504

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.