Great green bush-cricket

Systematic position: The Great green bush-cricket (Tettigonia viridissima) belongs to the order Orthoptera and the family Tettigoniidae. This large, mostly green insect is known for its acoustic communication and can become a significant pest when populations reach high densities.

Crops and damage: While primarily omnivorous, these crickets can damage various crops including cereals, maize, vines, and orchard fruits. They feed on leaves, flower buds, and young shoots. In some cases, they consume developing grains, leading to direct yield loss and increased risk of secondary infections through wound sites.

Biology and life cycle: They undergo incomplete metamorphosis. Females lay their eggs in soil or plant stems using their specialized ovipositor. Eggs remain in the soil, often overwintering for up to two years. Nymphs emerge in spring and undergo several molts before reaching the adult stage in mid-summer, actively feeding throughout the process.

Economic importance: During outbreak years, they can cause substantial damage to agricultural landscapes. The cumulative feeding behavior can strip foliage and destroy inflorescences, causing significant stress to plants and reducing overall market value of harvested produce.

Control measures: Managing bush-cricket populations requires an integrated pest management strategy:

• Deep autumn plowing to disturb and destroy eggs in the soil.
• Maintenance of clean field edges to remove shelter and breeding grounds.
• Targeted use of approved insecticides if population levels exceed economic thresholds.
• Enhancing habitat for natural predators like birds and predatory insects to maintain ecological balance.