helicoverpa zea larva on corn

corn food caterpillar worm helicoverpa zea earworm larva larvae pest vegetable cob maize isolated yellow agriculture grain healthy raw nature fresh green ear nutrition cereal nutritious cotton bollworm tomato fruitworm noctuidae noctuoidea lepidoptera insect arthropod animal seeds cub foods corns cateripllar catapillar trash started feeding grains coils cavity creates covering grains