Fall Armyworm
Spodoptera frugiperda
Infestations of fall armyworm are most likely to occur in late summer to early fall before frost (September – October). One to two worms per square foot can destroy seedling alfalfa, and populations of 10 to 15 per square foot have been observed to destroy 12- to 14-inch alfalfa. This is a migratory pest that does not overwinter in Kansas.
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Egg mass. |
Larva of fall armyworm
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Adult moths. |
Please refer to the most recent version of the Alfalfa Insect Management Guide for specific control alternatives.
Page last updated 4/16/2024 by J.P. Michaud.