Why can grasshoppers cause serious damage to crops and rangeland?

Grasshoppers, which belong to the order Orthoptera, cause significant damage to crops and rangeland primarily through their herbivorous feeding habits. While most species are solitary and generally harmless, certain short-horned grasshoppers known as locusts can undergo a dramatic biological transformation.123

When environmental conditions force solitary locusts to crowd together, hormonal changes trigger a shift into a gregarious phase. These insects then form massive, migratory swarms that travel great distances, consuming vast amounts of vegetation and causing widespread devastation to agricultural crops. In cattle-growing regions, grasshoppers also cause economic damage by competing directly with livestock for available forage.341

To mitigate these impacts, humans often employ insecticides and poison baits to control populations when they reach pest levels. It is essential to manage these populations ethically and effectively to protect food security while minimizing the environmental impact of chemical controls.15