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Silking to Harvest Derek and Matt (Discolored or dead plants (Barren stalk…
Silking to Harvest Derek and Matt
No silks Apparent
Delayed silking or failure to silk
Population too high for hybrid
Drought Stress
Low phosphorus supply
Nitrogen deficiency
Severe corn leaf aphid
Silks eaten off
Corn rootworm adult
grasshopper
Japanese beetle
Woollybear caterpillar
No pollen; tassels sterile
Improper kernel set
2,4-D or dicamba applied at improper time
Genetic male sterility
Leaves torn to pieces or missing
Large, irregular areas eaten in leaves
grasshopper
Fall armyworm
Damage to ear
Shucks eaten or open, kernels eaten or damaged
grasshoppers
Birds
Rodents or other animals
Kernels tunneled and eaten
Corn earworm
Corn borer
Picnic beetle
corn sap beetle
fall armyworm
Ends of ears eaten off
Deer, livestock
Discolored or dead plants
Reddish or purple leaves and stalk
Genetic character
Drought or other stress
Injury to leaf or stalk
Corn stunt
Maize dwarf mosaic
Stress by corn leaf aphids
Nematodes
Plant dies prematurely
Stalk rots
Severe corn borer damage or other stalk injury
Drought
Dead, frosted appearance of leaves
Helminthosporium leaf blights
Stewarts leaf blight
anthracnose
Barren stalk, no ears, only stunted nubbins or scattered kernels
Population too high for hybrid or season
Low fertility, especially nitrogen
drought
Corn leaf aphids
ear smut
Maize dwarf mosaic
Extreme hear during pollination
Nematodes
