Insect Alert For

Corn Earworm

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Alert Details

The corn-growing region weather pattern is expected to remain active for much of this week with southerly to southwesterly flow dominant until a cold front passes late in the week. With southerly winds and rainfall chances possible along and east of the cold front, and mid-south and even southern corn-growing region source regions now becoming less attractive for corn earworms, migration possibilities exist further north especially with crop growth lagging behind the average pace for this time of year. Low risks are in place tonight mainly between I-90 and I-70 from Kansas, Missouri, and Illinois north into Nebraska, southeast South Dakota, southern Minnesota, southern Wisconsin, Indiana, southern lower Michigan, and western Ohio. Southerly winds should increase tomorrow night in response to a deepening Plains low pressure system, so Moderate migration risks are in the forecast especially across far eastern Nebraska, Iowa, Minnesota, southwest Wisconsin, and western Illinois with Low risks as far east as south central lower Michigan into Indiana. Moderate risks shift east with the front Thursday night into Friday, and include central/eastern Illinois, Indiana, northwest Ohio, and southern lower Michigan with Low risks east into southern Ontario, Canada and the remainder of Ohio. Growers with crops at susceptible stages to damage, including but not limited to, processors and fresh market growers, should continue to monitor traps and scout fields as some new moth arrivals are possible over the next several days.