Mauritanian spiral snail

Mauritanian spiral snail (lat. Spiralia maura) is a gastropod mollusc known for its negative impact on agriculture and home gardening. Classified within the order of pulmonate molluscs, this pest is characterized by its ability to thrive in moist environments, making it a persistent challenge in irrigated fields and dense plantations where crops remain succulent throughout the season.

The host range of Spiralia maura includes a wide variety of vegetable crops, ornamental plants, and berry-producing shrubs. It poses a significant risk to high-value produce, as its feeding habits directly affect the harvestable portions of the plants, such as leaves, tender stems, and developing fruits that are in contact with the soil surface.

The biology of this species is defined by its high adaptability to microclimatic niches. Its life cycle involves phases of egg-laying in damp soil pockets, followed by rapid larval development. The snail exhibits distinct behavioral patterns, such as seeking refuge under organic debris during the day to avoid desiccation, and emerging at night to feed extensively on nearby host plants.

The damage caused by these molluscs is often identified by irregular, ragged holes in foliage and feeding trails on plant surfaces. Excessive mucus production not only leaves visible tracks but also facilitates the entry of pathogenic bacteria and fungi into the plant tissues. In severe cases, the snail's feeding activity can lead to the stunting of growth or even the total death of young seedlings.

Effective management strategies against Spiralia maura require an integrated approach:

• Cultural control by maintaining clean fields and removing excessive debris that acts as a hiding place.
• Mechanical barriers such as copper tape or coarse sand around seedbeds to deter migration.
• Biological control by encouraging natural predators such as ground beetles, toads, and thrushes.
• Chemical control using molluscicide baits containing iron phosphate or metaldehyde applied at the soil base.