Resource Portal

​Insect Forecast​


provided by:

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

To receive email alerts when your area is at risk, sign up here.

How to Read the Maps

Corn Earworm

July 03, 2015
No Risk

A low pressure system and associated cold front are predicted to develop across the Plains states this weekend and then move northeast across the western and upper Midwest by early next week. With the overall weather pattern still dominated by northwest flow, the risk of a larger-scale corn earworm migration event occurring with this front is pretty low. Nonetheless, Low risks are in place initially across the Plains and into the western Midwest and even portions of the upper Midwest in southern Minnesota and Wisconsin Sunday night into Monday as some isolated moths may travel from mid-south source regions that far north. The risk then shifts east as the front moves southeast early next week, with fields mainly in the southern Great Lakes and eastern corn-growing regions generally east of I-55 in Illinois at risk. Growers should be advised that some source region trap counts are now increasing which indicates corn earworm moth populations are becoming active. Continue to monitor subsequent forecasts for the latest information on potential moth flights as we move ahead this growing season.

Western Bean Cutworm

July 03, 2015
No Risk

No risk of western bean cutworm damage is predicted in the next five days. Moths are predicted to continue to emerge especially in the Great Lakes region and also potentially in the usual hot-spots in portions of Nebraska, but crops are not at a susceptible stage to damage as of yet so no risk is in the forecast at this time.

Corn Rootworm

July 03, 2015

Corn rootworm hatch will continue across much of the corn-growing region this week and weekend, with beetle emergence also expected to increase especially across portions of southwest into central and east-central Illinois as well as potentially into portions of western/central Indiana, Kansas, and eastern Colorado. Corn rootworm hatches will be possible in virtually all of the corn-growing region from the central Plains northward into the Dakotas and east into the upper Midwest and Great Lakes region as well. Growers should dig up roots, both in corn and soybean fields, and assess larvae populations and also take note of any root damage as problems this year may affect growing decisions for next year.

Soybean Aphid

July 03, 2015
No Risk

No risk of soybean aphid damage is predicted in the next five days. Soybean aphids, where present, will continue to colonize soybeans across much of the upper Midwest and Great Lakes region, but they will not cause any damage or result in any yield reductions at this growth stage.