Small Grains: Pest Management
Small Grains: Pest Management
Small Grains Insect Management Recommendations
Sampling Guidelines
| Growth Stage: Seedling (fall), Tillering – Boot Stage (spring) | |||
| Pest | Sampling Method | ||
| Aphids | In the fall, examine 1 linear foot of row in 10 sites; estimate the number of aphids per foot of row | ||
| Cereal leaf beetle | In the spring, begin checking for eggs and small larvae on 10 tillers/stems at 10 sites throughout a field, count the number of eggs and larvae per 100 tillers | ||
| Growth Stage: Head Emergence to Harvest | |||
| Aphids | Examine 10 grain heads in 10 sites until the early dough stage, count the number of aphids per head, also note beneficial insect activity | ||
| Cereal leaf beetle | Examine 10 stems in 10 locations through the early dough stage for larvae and estimate percent defoliation | ||
| True Armyworm | Starting in early May, examine 5 linear foot of row in 10 sites for the presence of larvae, be sure to examine the area at the base of the plants as well as under crop debris and weeds since the larvae are nocturnal. | ||
| Grass Sawfly | For initial detection in late April – early May, take 5 sweeps in 5 sites especially along field margins; Once larvae are detected examine five linear foot of row in 10 sites for the presence of larvae; Since larvae feed on the plants during the day, shake the plants in the 5 linear foot of row to dislodge larvae from the plants into the row middles. | ||
Insect Thresholds
| Growth Stage: Seedling (fall), Tillering – Boot Stage (spring) | |||
| Pest | Sampling Method | ||
| Aphids | In the fall, examine 1 linear foot of row in 10 sites; estimate the number of aphids per foot of row | ||
| Cereal leaf beetle | In the spring, begin checking for eggs and small larvae on 10 tillers/stems at 10 sites throughout a field, count the number of eggs and larvae per 100 tillers | ||
| Growth Stage: Head Emergence to Harvest | |||
| Aphids | Examine 10 grain heads in 10 sites until the early dough stage, count the number of aphids per head, also note beneficial insect activity | ||
| Cereal leaf beetle | Examine 10 stems in 10 locations through the early dough stage for larvae and estimate percent defoliation | ||
| True Armyworm | Starting in early May, examine 5 linear foot of row in 10 sites for the presence of larvae, be sure to examine the area at the base of the plants as well as under crop debris and weeds since the larvae are nocturnal. | ||
| Grass Sawfly | For initial detection in late April – early May, take 5 sweeps in 5 sites especially along field margins; Once larvae are detected examine five linear foot of row in 10 sites for the presence of larvae; Since larvae feed on the plants during the day, shake the plants in the 5 linear foot of row to dislodge larvae from the plants into the row middles. | ||