Nicholas Seiter 
IL Extension
nseiter@illinois.edu

Nicholas Seiter 
IL Extension
nseiter@illinois.edu

NICHOLAS SEITER UPDATES

Region 5 | May 15, 2024 | Champaign

Nick Seiter
nseiter@illinois.edu

SYNOPSIS

Alfalfa weevil reports have started to wind down a bit as the insects cycle out – they’re still out there in some areas, so stay vigilant. Black cutworm larvae will soon be large enough to cut plants and reduce stands; projected cutting dates based on moth trap densities and degree day accumulations are available here: https://corn.ipmpipe.org/insects/black-cutworm/ (map at bottom of page). Pay special attention to fields where winter annual weed control was delayed and broadleaf weeds are present in the field and/or dying while the crop is emerging. (A clean corn field is not a very attractive oviposition site for the moths and usually will not experience much cutting). Even in areas with high moth numbers, injury is sporadic, so don’t assume you’ll need to control just because you have some weeds.

WHICH OF THE FOLLOWING BEST DESCRIBES CURRENT CONDITIONS IN THIS COUNTY?
Mildly Wet (soil is wetter than normal, local vegetation is healthy)