| White Grubs, Wireworm |
Sample one square foot of soil 6 inches deep, take one sample for every 10 acres and a minimum of 5 samples per field |
| Cutworm |
Examine 10 plants in 10 locations and count the number of cut plants |
| Thrips |
Examine 10 plants in 10 locations and count the number of plants with damage; note if plants are stressed/yellowing/wilting |
| Grasshoppers |
Examine the number of grasshoppers per square yard |
| Corn leaf aphid, Greenbug |
Examine 10 plants in 10 sites and estimate the number of aphids/plant, characterize the degree of plant damage(red spotting, yellowing, plant death) and note the level of beneficial insect activity |
| European corn borer, Corn earworm, Fall armyworm |
Examine 10 plants in 10 locations and count the number of infested plants |
| Sorghum Midge |
Examine 5 plants in 10 sites by placing a plastic bag quickly over each head and counting the number of midges per head; should be done early morning or evening when flies are most active |
| Corn Earworm, Fall Armyworm, Sorghum Webworm |
Shake 10 heads in 10 locations over a white piece of paper and count the number of larvae dislodged from each head |
