Corn Earworm
Corn earworm migration risks will continue on a near daily basis for the next week, once again, as a continued active weather pattern is expected across at least portions of the corn-growing region. With any of these risks, southerly winds are not expected to be particularly strong so we do not have elevated risks in place, but the persistence of the risks may lead to some locally higher moth flights but still on an isolated or scattered basis. Low risks are in place tonight mainly from the Plains states east into portions of Wisconsin, Iowa, and Missouri as low pressure develops in southern Canada. These low risks spread east as far as the southwestern Great Lakes and into the Mississippi River valley tomorrow night into Wednesday, and then as far east as near I-75 Wednesday night into Thursday. There may be a brief break in any migration risk late week, but already by later Friday and into Saturday, the next risk begins to take shape back west in the Plains states and western corn-growing region before spreading east once again over the weekend. Growers should be regularly checking traps and scouting fields as numerous flights were documented in late June and also now as recently as around early July, and we may see a combination of new generations from those flights as well as new flights resulting in localized higher pressure in time especially with many crops now at susceptible stages to corn earworm damage.

