Palingeniidae

These insects are not pests of crops in the traditional sense, as they do not consume vegetation. However, they pose a significant threat to agricultural infrastructure. The larvae build complex burrow systems in the banks of large rivers and irrigation canals. This activity undermines the structural integrity of embankments, leading to erosion and the potential failure of water delivery systems essential for crop irrigation.

The biology of Palingeniidae is defined by a multi-year aquatic cycle. The larvae are specialized burrowers equipped with strong mandibles designed to penetrate dense clay and silt. After years of development, the nymphs emerge simultaneously in massive swarms. This mass emergence can obstruct agricultural machinery and interfere with the maintenance of irrigation facilities during the peak flight season.

The economic impact of Palingeniidae is focused on the maintenance of irrigation networks. By perforating the clay lining of irrigation channels, the larvae facilitate water seepage and loss of pressure. This damage often results in:

• decreased efficiency of water distribution;
• increased labor costs for repairing canal banks;
• accelerated sediment build-up within the irrigation network.

Control measures are primarily preventive and engineering-oriented. Since chemical treatments are environmentally hazardous and often ineffective in flowing water, the best approach is to reinforce canal walls with impervious materials such as concrete lining or geotextiles. These barriers physically prevent the larvae from nesting in the canal embankments, thereby protecting the water infrastructure from erosion and structural decay.