Nicholas Seiter
IL Extension
nseiter@illinois.edu
Nicholas Seiter
IL Extension
nseiter@illinois.edu
NICHOLAS SEITER UPDATES
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.