Based on the fact that only herbicide was used to grow the corn, this means that the resistance type of the corn are caterpillars.
What are herbicide and insecticide?
Herbicide are chemicals used to control and kill weeds that could hinder crop production while insecticides are chemicals used to control insect pests.
According to this question, a field of corn was grown with 250 L/ha herbicide and no insecticide. This means that only herbs or weeds are being controlled on the field.
Therefore, it can be said that the corn plants are the type that are resistant to caterpillars, which are examples of insects.
Learn more about herbicide at: https://brainly.com/question/9166713
