What does a corn worm look like? This is a common question among gardeners and farmers who are dealing with this unwanted pest. Corn worms, also known as corn earworms or fall armyworms, are the caterpillar stage of the moth known as Helicoverpa zea. These pests can cause significant damage to corn crops, as well as to other crops in the same family, such as cotton, sorghum, and soybeans.
Corn worms are slender, green caterpillars with a body length of about 1.5 to 2 inches. They have a distinctive dark brown head and a light brown or green body, which helps them blend in with the corn stalks. Their bodies are covered with fine hairs, and they have a pair of prominent spines on the back of their heads. As they grow, corn worms may change color, sometimes becoming darker and more difficult to spot.
One of the most noticeable features of a corn worm is its habit of feeding on the ears of corn. They will bore into the ear, creating a tunnel and laying eggs inside. This not only affects the quality of the corn but also leads to yield loss. Corn worms are also known for their rapid growth and ability to produce multiple generations in a single season, making them a challenging pest to control.
In addition to their green and brown coloration, corn worms have a distinctive feeding pattern. They create a series of V-shaped notches along the ear, which can be easily identified by examining the corn. These notches are a clear sign of a corn worm infestation and should be addressed promptly to minimize damage.
Controlling corn worms involves a combination of cultural, biological, and chemical methods. Crop rotation and the use of resistant corn varieties can help reduce the population of these pests. Biological control agents, such as beneficial insects and parasitoids, can also be employed to limit their numbers. In severe cases, insecticides may be necessary to protect the crop.
Understanding what a corn worm looks like is crucial for effective pest management. By recognizing the signs of an infestation early, gardeners and farmers can take timely action to protect their crops and reduce the economic impact of this destructive pest.
