A very favorable weather pattern for potential corn earworm migration is expected to lock itself into place across much of the corn-growing region for the next week. With crops at favorable growth stages to serve as hosts across a large area and mid-south/southern states source regions much less favorable hosts now, corn earworms are more likely to be on the move north at this point. As a result, Moderate migration risks are in the forecast a nightly basis for at least the next five nights as the overall pattern is expected to change little until later next week. Moderate risks are found mainly along/west of I-35 tonight into tomorrow from the Plains states into Minnesota, Iowa, and Missouri. The Moderate risk area shifts east as far as Wisconsin and Illinois tomorrow night into Sunday, and then stretches from the Plains states as far east as lower Michigan, southern Ontario, Canada, and Ohio by early next week. Growers all across the corn-growing region are encouraged to regularly check traps and scout vulnerable fields as numerous opportunities for moth flights are in the forecast in the next week!