| Cropping
Pattern or Culture Practice |
Key Pests |
| Field Corn
|
|
Corn following
an old sod |
Black cutworm
Wireworm
White grub
Slugs
Seed corn maggot
True armyworm
European corn borer
Sod webworm |
Corn following
an old hay field with significant orchardgrass
|
Stalk borer
Black cutworm
European corn borer
Seed corn maggot
Slugs |
Corn following
soybeans
|
Black cutworm |
Corn following
corn
|
Corn rootworm
European corn borer |
Corn following
a rye cover crop or following a corn field with rye overseeded to meet conservation
residue requirements |
True armyworm
Black cutworm |
Corn following
a crop with significant winter annual broadleaf weeds, especially common chickweed |
Black cutworm |
Corn
planted into soil with high organic matter or green plants, or manure freshly plowed down
|
Seed corn maggot |
Corn
planted early (Before May 1) or late (After June 1) |
European corn borer |
Corn planted
early via no-till |
Seed and seedling rots |
| Corn planted no-till into wheat
stubble |
Gibberella stalk and ear rot |
| Corn following corn planted with
conservation tillage practices |
Leaf diseases, especially gray
leaf spot |
Alfalfa and Alfalfa-grass Mixtures |
|
Fall Seedings
|
Slugs
Alfalfa weevil
Potato leafhopper |
| Spring Seedings |
Potato leafhopper |
Established
Stands |
|
First Crop
|
Alfalfa weevil
Clover root curculio |
Second and later crops
|
Potato leafhopper |
| Soybeans
|
|
Soybeans
following alfalfa |
Sclerotinia |
Soybeans
following an old sod or near a grassy area |
Grasshopper
Spider mites |
Soybeans
planted into soil with high organic matter or green material freshly plowed down |
Seed corn maggot |
| Soybeans following soybeans |
White mold |
Small Grains |
|
Wheat planted
before fly-free date |
Hessian fly
Corn leaf aphid
Fall armyworm |
Spring Growth
Period |
English grain aphid
True armyworm
Cereal leaf beetle |
Wheat
following grain corn (if stalk rot present) |
Fusarium head scab |
Wheat
following wheat
|
Take-all |
Wheat
following corn planted via conservation tillage practices |
Head scab |
Excessive Fall
growth of wheat |
Powdery mildew |
| High N fertility on wheat |
Powdery mildew |
