Country	Area of trait (‘000 ha)	Maximum area treated for rootworm pests: pre GM IR (‘000 ha)	Average ai use GM crop (kg/ha)	Average ai use if conventional (kg/ha)	Average field EIQ/ha GM crop	Average field EIQ/ha if conventional	Aggregate change in ai use (‘000 kg)	Aggregate change in field EIQ/ha units (millions)
US	15,816	9,183	0.2	0.6	12	32.5	−3,673	−188.3

Note:

1. There are no Canadian-specific data available: analysis has therefore not been included for the Canadian crop of 695,000 ha planted to seed containing GM IR traits targeted at rootworm pests

2. The maximum area treated for corn rootworm (on which the insecticide use change is based) is based on the historic area treated with insecticides targeted at the corn rootworm. This is 30% of the total crop area. The 2015 maximum area on which this calculation is made has been reduced by 620,450 ha to reflect the increased use of soil-based insecticides (relative to usage in a baseline period of 2008–2010) that target the corn rootworm on the GM IR (targeting corn rootworm) area. It is assumed this increase in usage is in response to farmer concerns about the possible development of CRW resistance to the GM IR rootworm technology that has been reported in a small area in the US