Grasshopper Infestations: Identification, Damage, and Control Methods

Why Grasshoppers Are Formidable Pests

Highly mobile, voracious, and diverse (hundreds of species), grasshoppers evade conventional controls. They leap from sprays, migrate long distances, and consume broadleaf plants, grasses, grains, fruits, and vegetables—threatening lawns, gardens, and crops equally.

Lifecycle Informs Timing

Most overwinter as eggs in soil. Spring hatching yields nymphs that molt several times before becoming winged adults. Adults alternate feeding and egg-laying cycles. Control is most effective at nymph stage.

Natural and Biological Controls

Fall and spring tilling: Exposes eggs to predators (birds, beetles) and desiccation. Reduces weed seedlings too.
Attract avian predators: Kestrels, larks, bluebirds eat grasshoppers. Provide feeders, nest boxes, perches.
Nosema locustae: Microsporidian parasite applied to nymphs. Infected nymphs are cannibalized, spreading the pathogen. Effective only at correct life stage.

Management, Not Eradication

Complete elimination is impossible—migration ensures recolonization. Sustainable strategy: monitor populations, apply timely biological controls, maintain habitat for predators, and accept low-level presence. Vigilance beats futile extermination attempts.