Stalk borer moth

Systematic position: Resapamea stipata is a species of moth belonging to the order Lepidoptera and the family Noctuidae. As a member of this family, it is recognized as an agricultural pest due to the larval stage's habit of boring into the stems of host plants.

Host crops: This pest primarily affects various cereal crops, including corn (maize), wheat, barley, and rye. It may also utilize wild grasses as alternative hosts, which allows the population to persist in areas where crop rotation or weed management is neglected.

Biology and life cycle: The species typically completes one generation per year. It overwinters in the egg stage, which is usually deposited on crop debris or near the base of host plants. Upon hatching in the spring, larvae begin feeding on vegetative tissue. Pupation occurs either within the plant stem or in the soil near the host plant.

Nature of damage: Larvae are internal feeders. They bore into the stem, causing the central leaves to wilt and die, a condition often described as "dead heart." This damage prevents the formation of grain heads and can lead to significant yield loss, especially if the infestation occurs during the early stages of crop development.

Protection measures: Effective management requires an integrated approach:

• Deep plowing in the autumn to bury and destroy overwintering eggs.
• Crop rotation to break the pest's life cycle.
• Strict weed control to remove alternative hosts during the early spring.
• Timely application of systemic or contact insecticides before the larvae penetrate deep into the stalks.