Paradoxosomatidae
Paradoxosomatidae are a family of millipedes belonging to the order Polydesmida. These soil-dwelling invertebrates are frequently found in environments with high humidity and soils rich in organic matter. In agricultural settings, certain members of this family can become pests, actively feeding on tender plant tissues and occasionally causing significant economic damage.
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Paradoxosomatidae
These millipedes are known to attack a wide range of vegetable, floral, and ornamental crops. They are particularly dangerous to young seedlings, sprouts, and roots that are in direct contact with damp soil or moist growing substrates. In greenhouse conditions, they can decimate nursery trays and young plants within a very short period if moisture levels remain high.
The biology of the family is characterized by a cryptic, nocturnal lifestyle. Their life cycle involves several molting stages, during which the millipedes gradually increase the number of body segments. They predominantly thrive in the upper layers of the soil, where they find a stable microclimate and access to decomposing organic matter or soft living plant tissues.
The damage caused by Paradoxosomatidae typically manifests as chewed leaf edges, gouged lesions on stems, and the destruction of delicate root systems. Damaged plants often exhibit stunted growth and become highly susceptible to secondary fungal or bacterial infections that enter the plant through these small wounds. High population densities in enclosed growing spaces can lead to severe crop thinning.
Control measures require a combination of cultural practices and chemical interventions:
- Regular removal of plant debris that provides shelter for the millipedes.
- Management of irrigation practices to prevent excessive soil moisture.
- Application of insecticidal seed treatments or granular soil-applied pesticides.
- Improving greenhouse ventilation to lower the humidity levels of the substrate.