Polyzoniidae

These pests primarily target root vegetables, tubers, and the seedlings of various garden crops. Potatoes, carrots, and beets are highly susceptible, especially in fields with heavy mulch or high soil moisture. The millipedes utilize their mouthparts to rasp and feed on the surface and interior of roots, often causing widespread destruction of the planting material.

The life cycle of Polyzoniidae involves egg deposition in soil, often in protective chambers created by the female. Development is gradual and spans several months to years, depending on environmental conditions. They thrive in stable, moist microclimates, which makes greenhouse environments and irrigated vegetable plots particularly attractive for their proliferation.

Damage caused by these millipedes is characterized by deep surface pitting and hollowed-out cavities in tubers and fleshy roots. Beyond direct feeding damage, the primary harm lies in the introduction of secondary pathogens. Open wounds created by the millipedes are ideal entry points for soft rot bacteria and various fungal infections, rendering the crops unmarketable.

Effective management requires a combination of physical, cultural, and chemical controls:

• Enhancing soil drainage to reduce humidity in the root zone.
• Avoiding the use of fresh manure or excessive crop debris near sensitive crops.
• Implementing crop rotation to break the life cycle of the pest.
• Using bait traps (e.g., damp wooden boards or sliced potatoes) for manual collection.
• Applying targeted soil insecticides according to local agricultural regulations if population thresholds are exceeded.