Illinois Field Crop Applicators Practice Test

What is the primary consequence of black cutworm feeding on corn?

1. Increased corn height

2. Reduced stands and stunted plants

3. Enhanced resilience to diseases

4. Accelerated maturity of the crop

The correct answer is: Reduced stands and stunted plants

The primary consequence of black cutworm feeding on corn is reduced stands and stunted plants. Black cutworms are known for their behavior of cutting young corn plants at or near the soil level, leading to significant stand loss in affected fields. This injury not only diminishes the population of plants, reducing overall crop density, but it can also compromise the growth of the plants that survive the feeding by leaving them weakened. As a result, the overall health and yield potential of the corn crop can be severely impacted. The other options do not accurately represent the effects of black cutworm damage. Increased corn height does not occur because the plants may be cut down before establishing proper height. Enhanced resilience to diseases is unlikely as the stress from feeding generally decreases a plant's ability to fend off illnesses. Similarly, accelerated maturity isn't a consequence of this pest; instead, the damage typically leads to delayed growth and maturity of the remaining plants due to the adverse effects of the infestation.