Euglena viridis

Euglena viridis is a unicellular flagellate organism categorized among euglenoid algae. In modern agronomy, especially in hydroponic cultivation, the uncontrolled proliferation of this organism is viewed as an environmental challenge, as it leads to the blooming of nutrient solutions, clogging of irrigation systems, and degradation of water quality.

The primary agricultural threat posed by Euglena is directed toward crops grown in hydroponic systems and nursery beds. By covering the water surface, the algae restrict the gas exchange between the nutrient solution and the atmosphere. This environment creates a hypoxic condition for the roots, which leads to root rot and reduced nutrient uptake in plants.

Visible symptoms include a bright green, oily layer on the water surface and the formation of a slimy biological film on the roots and irrigation pipes. As the population grows, the water may become turbid and emit an odor characteristic of organic decomposition, signaling that the growth environment is becoming hazardous for the cultivated plants.

The development of Euglena is driven by high light exposure, stagnant water, and an abundance of mineral salts, specifically nitrogen and phosphorus. These conditions are commonly found in commercial greenhouses where nutrient-rich water is circulated or stored in transparent tanks, allowing for rapid photosynthesis and subsequent algal blooms.

Protective measures are primarily focused on preventative sanitation and light management. Producers must ensure that all reservoirs are made of opaque materials or covered to prevent light penetration. Effective control strategies also include the installation of UV-C sterilizers in water circulation systems and the implementation of rigorous cleaning protocols for all equipment to prevent the accumulation of bio-film.

• Install high-efficiency water filtration systems.
• Use opaque tubing and tanks to block light.
• Apply peroxide-based treatments for system disinfection.
• Monitor the nutrient concentration to avoid excess waste.