Long-winged grasshopper

Systematic position: Dissosteira longipennis belongs to the family Acrididae, order Orthoptera. This species is widely recognized for its significant migratory capabilities and its historical impact on agricultural productivity, particularly within the grassland regions of North America.

Crops damaged: This pest is a generalist feeder (polyphagous) but shows a strong preference for members of the Poaceae family. Primary host plants include wheat, corn, millet, and a variety of native perennial grasses found on rangelands and natural prairies.

Biology and life cycle: The life cycle comprises the egg, nymph (instar), and adult stages. Fertilized females deposit egg pods into the soil, where the embryos overwinter. In the spring, nymphs emerge and undergo several molting stages, gradually developing their wings and reproductive capabilities.

Damage character and economic importance: The pest causes damage by consuming the vegetative parts of host plants, specifically leaves and stems. During outbreaks, high-density swarms can defoliate and destroy entire fields within a very short period, leading to severe economic losses for agricultural operations.

Protection measures: Effective management strategies include:

• Tillage practices in autumn to destroy egg pods deposited in the soil.
• Monitoring of breeding grounds during the early spring to detect nymphal emergence.
• Application of chemical insecticides when local populations reach economic injury levels.
• Maintenance of natural predator habitats to support biological regulation.

Integrated pest management (IPM) is essential to mitigate the risk of large-scale migratory swarms, ensuring that chemical interventions are applied only when necessary to preserve crop yield and food security.