Insects are just one of several factors that can reduce emergence and/or injure plants in the spring. This handy chart from the University of Wisconsin will help pinpoint the possible culprit.
Black cutworm moths appear to be more active than normal, says Penn State Extension, and juvenile slugs have hatched out of their eggs in no-tilled fields.
An Ohio State University Extension entomologist recommends growers start scouting for black cutworms as soon as corn emerges, checking for symptoms of above- and belowground feeding.
Ohio State University Extension says the recent rainy, cool weather is ideal for slugs, with no-till fields with high residue at a higher risk of slug feeding.
Black cutworms lay eggs on grassy weeds or cover crops, low-growing winter annuals and no-till crop residue, while armyworms are attracted to weedy corn fields, cover crops, grassy alfalfa stands and wheat fields.
No-tillers are urged to walk their fields for signs of damage, as populations are usually patchy, and adjacent fields can have very different populations.
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On this edition of Conservation Ag Update, brought to you by CultivAce, Gregg Sanford, Wisconsin Integrated Cropping Systems Trial manager, reveals how no-till is stacking up to other major systems in year 34 of the trial.
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