Corn Earworm
A rather stagnant weather pattern is likely across much of the corn-growing region for the next few days before some progression occurs by the weekend. High pressure is expected to remain anchored over the eastern corn-growing region for the next few days with low pressure in the Montana/western Dakotas region. South to southwest winds, albeit somewhat lighter in nature with strongest wind speeds focused mainly across the Plains states from Kansas north into the Dakotas, will continue until a weak cool front drops south by next weekend. Low corn earworm migration risks are predicted tonight into tomorrow mainly west of the I-35 and US 65 corridors from Kansas and western Missouri north into South Dakota and Minnesota. The Low risk shifts east a little bit tomorrow night into Thursday but still remains west of the Great Lakes. By the end of the week, Moderate migration risks enter the forecast across portions of the Plains and western corn-growing region, including Kansas, Nebraska, South Dakota, Minnesota, Iowa, and Missouri, with the Low risk advancing east into the southwestern Great Lakes as high pressure finally begins moving into the eastern United States. Moderate risks then extend as far east as southwest lower Michigan and Indiana by late Friday into Saturday as the cold front begins settling south and south to southwest winds finally make their presence known further to the east. This isn’t looking to be a slam dunk weather setup for widespread corn earworm migration, but we cannot ignore the fact that moth populations are increasing in mid-south and southern source regions and also, crop stages in those areas is also becoming less attractive so those moths are actively seeking new sources, either in their source regions or elsewhere, so flights will remain possible further north, as well.

