Diagnosing Corn Stand Establishment Issues
Understanding what may have caused a reduced stand can help you prevent the same issues from occurring next year or perhaps help you make a better replant decision. Get tips on identifying causes of stand problems.
|No seed found.||Planter issues, rodents or birds. You should see evidence of digging by rodents or birds.||Missing plants (skips)|
|Poorly developed radicle or coleoptile with evidence of dark discoloration on them.||Disease, seed rots, poor vigor||Skips|
|Seeds hollowed out.||Insect damage by seedcorn maggot or wireworm||Skips|
|Discolored and malformed seedlings. Twisted roots or clubbed roots.||Herbicide injury||Skips|
|Short coleoptiles. Leaves emerging prematurely.||Imbibitional chilling damage||Weak seedlings. Death if leaves don't reach surface.|
|Brown necrotic tissue behind root meristem. Dead root or shoot meristems. Many lateral roots.||Chilling damage
|Seedlings may survive if lateral roots take over. Death if shoot meristem is damaged.|
|Leaf shredding, bursting at coleoptile side, coleoptile damage.||Seed furrow compaction. Mechanical damage to the seed. Soil crusting.||Usually death. Seedlings lose ability to penetrate soil.|
|Leafing out underground.||Light penetration. Improper furrow closure, sidewall compaction. Chilling||Leaves do not reach soil surface.
|Wilting, dead seedlings postemergence||Seedling diseases||Death|
|Brown root tips, purple, wilted seedling||Salt injury from fertilizer or high manure rates.||Possible death if enough roots affected and little lateral root growth present.|