Spicodiaptomus chelospinus

Spicodiaptomus chelospinus is a crustacean species belonging to the order Calanoida, family Diaptomidae. While primarily known as a freshwater zooplankton organism, it has significant implications in agricultural regions where irrigation is heavily utilized, particularly in flooded fields such as rice paddies, where it can interact negatively with crop development.

The distribution of this species is largely facilitated by irrigation infrastructure. When these organisms are introduced into agricultural environments through water supplies, they find suitable conditions for rapid population growth, potentially interfering with the delicate early-stage development of submerged or moisture-loving crops.

The biology of Spicodiaptomus chelospinus is governed by aquatic environmental factors. The life cycle consists of various developmental stages, including nauplius and copepodite phases. These stages are highly sensitive to water temperature and nutrient availability, allowing the population to explode under favorable conditions during the growing season.

The pest causes damage by mechanically affecting the root systems and tender shoots of young plants. Furthermore, its proliferation creates a dense biomass that can alter the chemical composition of the water and soil-water interface, leading to nutrient uptake suppression and reduced plant vitality in infested areas.

Management and control strategies include the following:

• Implementing water filtration systems in irrigation canals to reduce pest introduction.
• Applying controlled irrigation cycles, including scheduled drying periods to interrupt the life cycle.
• Monitoring population densities throughout the critical growth phases of the crop.
• Utilizing selective biopesticides that target aquatic invertebrate pests without harming the main crop.