Lesser mottled grasshopper

The Lesser mottled grasshopper (lat. Stenobothrus stigmaticus) belongs to the order Orthoptera and the family Acrididae. This species is commonly found across temperate regions of Eurasia and is recognized as a potential pest in agricultural settings, particularly in grasslands and cereal field margins.

This grasshopper primarily feeds on graminaceous plants, including cultivated cereals and various forage grasses. While it often exists at low densities, favorable climatic conditions can trigger population booms, leading to significant consumption of plant biomass and posing a threat to agricultural productivity in localized areas.

The life cycle involves an egg stage, several nymphal instars, and the adult phase. Eggs are laid in the soil by females in late summer or autumn and overwinter there. Nymphs emerge in the spring, feeding on tender grasses as they grow, eventually maturing into winged adults capable of dispersal across the fields.

Feeding damage occurs when adults and nymphs chew the margins of leaf blades, leading to tattered foliage and reduced photosynthetic area. In severe infestations, excessive grazing can stunt the growth of young cereal crops and reduce the overall quality and nutritional value of hay or pasture forage.

Integrated Pest Management (IPM) strategies for controlling this species include the following practices:

• Cultivation techniques like deep plowing to destroy overwintering egg pods.
• Maintaining field margins to manage weed hosts and limit grasshopper migration.
• Regular monitoring of population density during spring and summer months.
• Targeted application of biological or chemical pesticides only when damage thresholds are exceeded.