Stripe-winged grasshopper

Systematic position. The stripe-winged grasshopper (Stenobothrus lineatus) belongs to the order Orthoptera and the family Acrididae (short-horned grasshoppers). It is a common species found in temperate habitats, typically inhabiting dry grasslands, meadows, and pastures where the vegetation is sparse and sunlight reaches the soil surface.

Affected crops. This pest primarily feeds on various species of grasses. In agricultural settings, it can cause significant damage to permanent pastures and cultivated forage grasses. During outbreaks, the stripe-winged grasshopper is known to migrate into cereal crop fields, consuming the foliage of wheat, barley, and other small grains.

Biology and development. The species undergoes incomplete metamorphosis. It overwinters in the egg stage, with eggs deposited in the soil in protective pods. Nymphs emerge in the spring and progress through five developmental stages (instars) before reaching maturity. Adults are typically present from mid-summer until late autumn, completing one generation per year.

Nature of damage. Damage is characterized by the consumption of leaf blades. Younger nymphs often feed on the tender tips of grasses, while older nymphs and adults consume larger portions of the foliage, often leaving only the tough midribs. This defoliation reduces the photosynthetic capacity of the plants, leading to weakened growth and reduced yields.

Control measures. Integrated pest management strategies are essential to keep populations below economic thresholds:

• Tilling and plowing of egg-laying sites to destroy soil-dwelling eggs.
• Maintaining field margins and eliminating weeds to reduce breeding habitats.
• Regular field scouting to monitor nymph population density.
• Application of approved insecticides as a last resort when infestation levels exceed the threshold.