2024 Iowa Evaluation of Insecticides and Plant-Incorporated Protectants
December 9, 2025
This report provides a summary of research conducted by the Gassmann Lab at Iowa State University to evaluation insecticide products and traits for corn rootworm management.
In Iowa, the species of corn rootworm (CRW) that are of economic importance include western corn rootworm (Diabrotica virgifera virgifera LeConte) and northern corn rootworm (D.
The goal of this research program is to serve the agricultural community of Iowa by monitoring and evaluating the performance of registered and precommercial insecticides and transgenic corn hybrids.
The 2021 Field Crop Insect and Disease Applied Research Report provides farmers with updated control efficacy and pest distribution information for major pests of corn and soybean.
Last week, a team of us met up at the Iowa State University Southeast Research Farm (SERF) to evaluate root injury in a small trial for corn rootworm management. The trial had four treatments replicated eight times. The treatments included no management (glyphosate-tolerant only; no Bt traits or insecticide), granular soil-applied insecticide (Aztec), SmartStax®, and SmartStax® Pro (RNAi).
In Iowa, the species of corn rootworm (CRW) that are of economic importance include western corn rootworm Diabrotica virgifera virgifera LeConte and northern corn rootworm D.