Pyrenean bush-cricket

The Pyrenean bush-cricket (Isophya pyrenea) is a species of insect belonging to the family Tettigoniidae. While often considered a part of the natural ecosystem, in agricultural settings, it can behave as a pest, causing localized damage to various cultivated plants due to its dietary preferences.

This species is polyphagous, meaning it feeds on a variety of hosts. It primarily targets vegetable crops, fruit trees, and various herbaceous plants. By consuming tender leaves, flower buds, and stems, it can negatively impact the development and overall health of the affected vegetation.

The life cycle begins with the egg stage, where the insects overwinter in the soil or protected plant debris. As temperatures rise in spring, nymphs emerge and undergo several developmental stages. Throughout the summer, they grow rapidly, becoming highly mobile and increasing their feeding intake before reaching the adult stage.

Damage caused by the Pyrenean bush-cricket is characterized by irregular holes in leaves and the consumption of young shoots. Severe infestations can lead to significant biomass loss, stunted plant growth, and a reduction in crop yields. Early detection is crucial to prevent the population from reaching damaging levels.

Management strategies focus on a combination of cultural and chemical practices. Key measures include:

• Deep autumn ploughing to destroy overwintering egg pods in the soil.
• Maintaining field margins free of dense weeds that provide shelter.
• Monitoring population levels using visual inspections during the nymphal stages.
• Targeted application of authorized insecticides if economic thresholds are exceeded.