Predicting Stalk Borer Development in Corn
Based on accumulated degree days, scouting should be underway across the state for common stalk borer (Figure 1).
For information on scouting and treatment see Stalk Borer Scouting and Management in Corn in the June 10, 2016 CropWatch.
|Degree day accumulation from Jan. 1||Event (Egg and Larva Development)|
|575||Egg hatch begins|
|750||Egg hatch complete|
|1,400||10% of larvae move out of grasses|
|1,700||50% of larvae move out of grasses|
|Degree day accumulation from Jan. 1||Event (Pest Control)|
|1,300-1,400||Begin scouting grassy field borders and corn|
|1,400-1,700||Make insecticide treatment decision in corn|