Dolerus gonager

Dolerus gonager is a species of sawfly belonging to the order Hymenoptera and the family Tenthredinidae. This insect is recognized as a significant pest in agricultural environments, primarily targeting cereal crops across various temperate regions.

The pest primarily infests small grains, including winter and spring wheat, rye, and barley. The larval stage, often referred to as false caterpillars, causes damage by consuming plant tissue, which can significantly inhibit the photosynthetic capacity of the plants during critical growth stages.

The biology of this species involves a single generation per year. Adult sawflies emerge in the spring, and females deposit eggs into the plant tissues. After completing their larval development, the insects burrow into the soil to pupate, where they overwinter until the next season begins.

The damage caused by Dolerus gonager is characterized by the consumption of leaf blades. Initially, this manifests as notched edges, but heavy infestations can lead to severe defoliation, leaving only the primary veins of the leaves, which negatively impacts the overall yield and grain development.

Management of this pest involves an integrated approach to minimize crop losses. Key strategies include:

• Deep fall plowing to disrupt the pupation sites in the soil.
• Strict adherence to crop rotation practices to reduce pest pressure.
• Targeted insecticide applications based on field scouting and economic thresholds.

Farmers should prioritize regular monitoring during the early stages of plant development. By identifying the presence of larvae early, growers can implement timely chemical or cultural controls to prevent widespread damage to the cereal stands.