Each year, the ISU Entomology Department produces a few Yellow Books that evaluate insecticide efficacy and PIPs (plant-incorporated protectants). My lab produces one for soybean insects, but mainly focuses on soybean aphid. Aaron Gassmann produces one for corn insects, with the majority of the report on corn rootworm.
Both are available (FREE!) as a pdf on our departmental website.
View the 2011 Corn Pests Yellow Book.
View the 2011 Soybean Pests Yellow Book.