Trachysphaera fructigena

The body is covered by a sclerotized exoskeleton, which protects the organism from environmental stress and predation while keeping moisture levels stable.

These organisms are typically found in moist, organic-rich soils, where they play a role in decomposition, but they can become pests in agricultural environments.

Their life cycle involves multiple developmental stages within the soil profile, with moisture being the critical factor for their survival and reproductive success.

Although generally considered detritivores, Trachysphaera fructigena frequently shifts to feeding on live plant tissues, particularly when their natural food sources are limited.

The primary damage occurs on low-hanging or ground-level vegetables and fruits, such as tomatoes, cucumbers, strawberries, and various root crops.

These millipedes excavate deep holes and chambers in succulent tissues, which subsequently become entry points for secondary fungal infections and bacterial rots.

Significant yield losses in strawberry plantations occur when the millipedes feed on ripening berries that touch the damp soil surface.

Seedlings and young plants often suffer from collar rot caused by the millipedes feeding on the outer tissues of the stem near the soil level.

In addition to direct consumption, the overall quality and shelf life of the harvested produce are severely compromised due to the introduced infections.

The activity of Trachysphaera fructigena is closely linked to soil moisture levels, with peak activity observed during rainy seasons and in irrigated agricultural areas.

Springtime brings increased activity as the temperature rises, leading to feeding and mating cycles within the upper soil layers.

During dry summer months, they tend to move deeper into the soil to escape desiccation, although they may still cause damage in shaded or heavily watered regions.

Autumn triggers a shift in activity as the pests prepare for overwintering, often moving into compost heaps or deeper soil profiles to survive the cold.

Greenhouse environments provide ideal year-round conditions for these pests, where constant humidity allows for continuous cycles of infestation and reproduction.

The presence of Trachysphaera fructigena is usually identified by small, clean-cut cavities on the underside of fruits touching the soil.

Finding small, hard, rounded spheres that become immobile upon touch under crop foliage or near plant bases is a classic diagnostic sign.

Accumulation of tiny, sand-like fecal pellets around the root collar of plants is another indicator of a local population of these millipedes.

Wilting of plants despite adequate soil moisture often suggests subterranean feeding by millipedes on roots or the plant collar.

• Holes on the bottom of fruits resting on soil.
• Coiled, ball-like specimens near plant bases.
• Fine, granular dark frass on the soil surface.

The most effective strategy is the use of physical barriers, such as plastic mulch or straw, to prevent direct contact between fruits and the soil.

Managing soil moisture and avoiding excessive irrigation is crucial, as this reduces the hospitable environment that these pests require to thrive.

Deep cultivation or tilling of the soil before planting can physically damage millipede populations and expose them to drying conditions.

Trapping techniques using slices of potatoes or carrots placed on the ground can help attract and manually collect the pests for removal.

Chemical control measures using soil-applied insecticides should be used as a last resort, strictly adhering to product labels and harvest safety intervals.