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​Insect Forecast​


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Insect Migration ​Risk Forecast

Is your corn at risk? monitors weather patterns and provides daily insect migration data for crop-damaging insects such as Corn Earworm and Western Bean Cutworm.

These risk forecasts utilize strategically placed moth traps across the major crop-growing areas of the country and combined with weather patterns, can provide flight patterns up to five days in advance. Information is updated daily May through September. Stay ahead of the game with

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How to Read the Maps

Black Cutworm

May 24, 2016

Black cutworm migration risks will continue in the forecast for the next four nights as an active weather pattern remains in place. With a persistent pattern of low pressure in the western Plains and high pressure in the eastern and southeastern United States, south to southwest winds along with scattered areas of precipitation will be rather common across a large portion of the corn-growing region. These factors may combine to produce isolated to scattered black cutworm moth flights. Low risks are in place tonight into tomorrow morning mainly south of I-90 and west of I-75, or from the central Plains states east into Indiana and Ohio. Moderate risks return to the forecast tomorrow night into Thursday morning mainly east of I-57 in far eastern Illinois, Indiana, Ohio, and southern lower Michigan with Low risks east of I-35 as a cold front moves east and south to southwest winds increase further east across the corn-growing region. By late week into next weekend, south to southwest winds are predicted to continue but refocus to the west as low pressure develops once again in the Plains. Low risks are predicted from Kansas and Missouri northeast into Minnesota, Wisconsin, and across southwest lower Michigan into Indiana. Moderate risks are in the forecast from Iowa and Minnesota east into Wisconsin and Illinois Friday night into Saturday morning as a cold front begins to move east. Growers who have just recently planted or have yet to plant, and are located in or near a Moderate risk area are encouraged to monitor for new moth flights in the next week as these are the fields that are at greatest risk.

Corn Earworm

May 24, 2016

An active weather pattern featuring persistent areas of low pressure systems and a cold front in the Plains and high pressure across the southeastern United States should lead to rather persistent south to southwest winds across a large portion of the corn-growing region for the next several days. Low migration risks are predicted on a nightly basis from tonight into Saturday morning, so some isolated moth flights are possible. The risk area tonight into tomorrow morning mainly south of US 20 and west of the Mississippi River, or from Nebraska and Iowa south into Kansas into Missouri. The risk area shifts east between I-35 to I-75 tomorrow night into Thursday morning, and then refocuses west as a new low pressure develops later this week. The risk area initially is mainly in the Plains northeast into the southwestern Great Lakes region, and then shifts mainly east of I-35 from Iowa and Minnesota east into the southern Great Lakes region into the eastern Midwest by late week and early into the weekend. Growers should be advised that there is no threat to crops at this point, but these early flights may result in additional generations later this summer that could harm crops so intense moth flights should be noted.

Corn Rootworm

May 24, 2016

Corn rootworm hatches are predicted to either commence or continue especially across portions of southeast into eastern Kansas this week. Additional hatches will also be possible in southwest and central Kansas by late week into next weekend. We may also see some corn rootworm hatches commence later this week and into next weekend across traditionally earliest hatching regions of central into southwest Illinois as well as far northwest and northeast Missouri, far eastern Illinois into western Indiana, and also potentially extending northwest into west-central Illinois and far southeast Iowa. Growers should begin to scout for newly hatched corn rootworms in these areas in the next week, both in corn and soybean fields. Volunteer corn may also pose problems, especially if there has historically been issues with corn rootworms in recent years.

Soybean Aphid

May 24, 2016
No Risk

No risk of soybean aphid damage or migration is predicted in the next five days.

Western Bean Cutworm

May 24, 2016
No Risk

No risk of western bean cutworm emergence or development is predicted in the next five days.