EPISODE · Aug 4, 2026 · 17 MIN
Diamides vs Corn Earworms
from Field To Yield: Crops & Comments · host Geoff Reeves
In this episode we dive into the physical mechanisms of how top insecticides take down corn earworms in soybeans. Designed for row-crop farmers and agronomists in the Southeast, this episode strips away the marketing to look purely at field performance and how these chemistries operate inside the insect and the plant. We compare two fundamental approaches: a rate-flexible tank mix of Coragen Evo and bifenthrin, and the fixed premix Intrepid Edge. Tune in to learn: Speed vs. Duration: The critical tradeoff between fast-acting contact knockdowns (like pyrethroids) and slower, ingestion-driven residuals that provide long-lasting control. Modes of Action: How different active ingredients attack the insect, from locking up muscles and overstimulating the nervous system, to triggering a lethal, premature molt. Scouting Expectations: Why finding live but "moribund" (doomed) twitching worms days after spraying means your diamide or insect growth regulator is actually doing its job. Performance Realities: How documented pyrethroid resistance in the Southeast impacts the heavy lifting your tank mixes have to do. Whether you are prioritizing rapid knockdown for a broad pest complex or extended residual control for caterpillars, this episode gives you the scientific reasoning needed to make informed product selections for your fields.
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Diamides vs Corn Earworms
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