Dictyochophyceae

Dictyochophyceae is a class of unicellular golden algae found in various aquatic environments. It is essential to clarify that these organisms are not plant pathogens or disease agents; they belong to the phytoplankton community and primarily exist as neutral or beneficial components of natural ecosystems, though they can be problematic in human-managed water systems.

These organisms are known for their silica-based endoskeletons. In the agricultural sector, the primary interest in this class arises from their presence in open water sources used for irrigation. While they do not directly infect crops, their biomass can accumulate in reservoirs, affecting the chemical and physical quality of the water used for irrigation purposes.

The economic harm caused by excessive phytoplankton growth, including some members of this class, is related to the mechanical obstruction of irrigation equipment. Clogged emitters, filters, and hoses can significantly reduce the efficiency of drip irrigation systems, leading to uneven water distribution and potential yield losses due to moisture stress in plants.

The development of these microalgae is driven by nutrient enrichment (eutrophication) of water bodies, high light intensity, and suitable water temperatures. Runoff from fertilized fields containing nitrogen and phosphorus is the main factor stimulating the proliferation of aquatic algae in storage ponds and irrigation canals.

• Regular monitoring of water quality in storage reservoirs.
• Implementation of advanced mechanical filtration systems for irrigation lines.
• Nutrient management practices to reduce fertilizer leaching and runoff.
• Use of approved algicides for water treatment in critical scenarios.

Effective prevention involves integrated water management and sustainable fertilizing practices. By controlling nutrient runoff and maintaining the integrity of irrigation infrastructure, growers can prevent the proliferation of algae and ensure that the water applied to crops remains clean and conducive to optimal plant growth.