Table 4 Projections required quantifying the impact of GE crops on insecticide use in the US, 1996–2011
From: Impacts of genetically engineered crops on pesticide use in the U.S. -- the first sixteen years
Parameter | Supplemental table(s) impacted | Basis for setting value | Basis and explanation |
|---|---|---|---|
Corn | |||
Share of Insecticide Applications Targeting the European Corn Borer (ECB) Versus Corn Rootworm (CRW) | 11, 12 | Guidance from extension IPM specialists and land grant university spray guides | Some insecticides applied exclusively for control of ECB, others for control of CRW; and some target both. The percent hectares treated with a given insecticide are apportioned relative to target pests: ECB, CRW, or other insects. |
“Other Insecticides” Applied in 2010 for ECB Control | 11 | NASS data on “Other Insecticides” applied in 2010 | NASS reported 237,000 pounds of “Other Insecticide” use in 2010; 30% of these “Other Insecticides” applied to corn in 2010 projected to target the ECB. |
“Other Insecticides” Applied in 2010 for CRW Control | 12 | NASS data on “Other Insecticides” applied in 2010 | NASS reported 237,000 pounds of “Other Insecticide” use in 2010; 60% of “Other Insecticides” applied to corn in 2010 projected to target the CRW. |
Cotton | |||
Share of Insecticide Applications Targeting the Budworm/Bollworm Complex | 13 | Guidance from extension IPM specialists and land grant university spray guides | Some insecticides applied exclusively or partly for control of the budworm/bollworm complex, others for other insects; percent hectares treated with a given insecticide is apportioned relative to target insects. |