The yellowstriped armyworm is similar in appearance to fall armyworm. Elevest, Prevathon, Vantacor, Besiege), methoxyfenozide (Intrepid 2F, Intrepid Edge), or spinosad (Blackhawk) using a material that is labeled for your particular crop. A better option might be to use a product containing chlorantraniliprole (e.g. At minimum, if you have used a pyrethroid for fall armyworm control you should follow up with a field visit a few days later to see how it did. While I have not received reports of control failures yet in Illinois, these insects have migrated to Illinois from the south, so we should anticipate similar problems here. (Control issues with pyrethroids are not a new phenomenon in corn and sorghum). In addition, the yellow-striped armyworm ( Spodoptera ornithogalli), a relatively minor pest of soybean and alfalfa, seems to be present at above-average levels in Illinois this year.Īdding to the concern, our colleagues to the south have experienced control failures this year with pyrethroid insecticides, which in years past have typically been effective on fall armyworm in small grains, pasture grasses, soybean, and alfalfa. Avoid confusing this insect with either the “true” armyworm ( Mythimna unipuncta), which we are used to seeing in May-June in vegetative corn and other crops in particular, note that fall armyworm is much more capable of causing meaningful defoliation in soybean than the true armyworm. This should put us on alert in pastures, alfalfa forage, late-planted soybean, and early planted wheat or small grain cover crops (not to mention lawns). This is a migratory pest, and moth flights have been arriving both earlier and at higher numbers than in previous years. has had a big year for fall armyworm (you can read more about their experience here, as well as find links to additional control information from the states involved: ). Over the last two weeks, reports of fall armyworm ( Spodoptera frugiperda) activity in southern and western Illinois have been on the rise, with reports of severe injury in some cases. Note the broad, pale band across the top of the body, inverted y-marking on the head, and 4 black spots on the 8th abdominal segment. Illinois Crop Budgets and Historic ReturnsĪ fall armyworm larva.Marketing and Crop Insurance Risk Model.Illinois Soil Productivity and Yield Utilities.Biomass Crop Budget Tool – Miscanthus and Switchgrass.Appraisal of Current Financial Position.Post Application Coverage Endorsement Tool.Crop Insurance Summary of Business Tool.Balance Sheet & Historical Financial Statements.Post Application Coverage Endorsement Tool (Sheet).Crop Insurance Summary of Business Tool (Sheet).
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