Glossosomatidae

Crops and affected objects: these insects are not pests in the traditional sense of open-field agriculture. However, they pose a significant threat to facilities engaged in the farming of salmonids and other valuable fish species (aquaculture). Direct damage to cultivated plants is possible only in hydroponic systems or when growing aquatic plants, where the larvae actively graze on the tender parts of roots and stems.

Biology and life cycle: the life cycle of Glossosomatidae includes four stages: egg, larva, pupa, and imago. The adults are short-lived winged insects that lay their eggs directly into the water. The larvae develop over several months, passing through several instars, and feed actively on periphyton—a complex of algae and microorganisms on rocks, which often leads to damage to the technical components of water channels.

Nature of damage and harmfulness: the primary danger lies in high population density, which can quickly clear surfaces of beneficial biofilms or damage filtration systems in fish tanks. During mass reproduction, they can indirectly affect water quality by altering the microflora of the water body, which negatively impacts the growth rates of farmed hydrobionts.

Protection measures: controlling the population of this pest in artificial water bodies requires a comprehensive approach focused on mechanical cleaning and modification of water parameters. The following methods are used to reduce the population:

• Regular mechanical cleaning of canal walls and pools to remove fouling.
• Control of light levels, which restricts the development of the primary food source for the larvae.
• Use of fine-mesh filters to prevent larval migration into operational areas.
• Biological control by introducing natural predators into closed-loop water supply systems.