Understanding Cankerworms: Types, Damage, and Control Methods

Cankerworms are the larvae of various species of moths that feed on leaves, flowers and fruits of plants. They are also known as cutworms or leafminers, depending on their specific species and the type of damage they cause. Cankerworms can be found in many parts of the world and can cause significant damage to crops and gardens.

Cankerworms are typically yellowish-white or light green in color and have a distinctive pattern of stripes or spots on their bodies. They are usually around 1-2 inches (2.5-5 cm) long and have a plump, worm-like appearance. As they feed on plants, cankerworms can cause leaves to turn yellow, brown, or black, and may also create holes or mines in the leaves.

Some common species of cankerworms include:

* The European corn borer (Ostrinia nubilalis), which feeds on corn, wheat, and other grains.
* The western corn rootworm (Diabrotica virgifera), which feeds on corn and other crops.
* The cabbage looper (Trichoplusia crambidae), which feeds on cabbage, broccoli, and other brassicas.
* The imported cabbageworm (Pieris rapae), which feeds on cabbage, broccoli, and other brassicas.

Cankerworms can be controlled using a variety of methods, including:

* Insecticides: Chemical pesticides can be used to kill cankerworms, but this approach can be harmful to beneficial insects and should be used sparingly.
* Biological control: Natural predators, such as lady beetles and lacewings, can be used to control cankerworm populations.
* Cultural control: Changing the timing of planting, using resistant varieties, and practicing good agricultural practices can help reduce the risk of cankerworm infestations.
* Integrated pest management: A combination of these methods can be used to effectively manage cankerworm populations while minimizing harm to beneficial insects and the environment.