Discus rotundatus

Discus rotundatus belongs to the phylum Mollusca, class Gastropoda, family Discidae. It is a small land snail characterized by a flattened, disc-like shell with distinct reddish-brown markings, which makes it easily identifiable among other soil-dwelling organisms.

In agronomy, this species is considered a secondary pest that can negatively impact decorative plants and garden vegetables. Discus rotundatus typically thrives in high-humidity environments, preferring areas with dense foliage, decaying organic matter, and shaded habitats, making it a common visitor in greenhouses and damp garden corners.

The biology of this snail is closely tied to moisture levels. Reproduction involves laying eggs in soil or under organic debris. Upon hatching, the juvenile snails resemble miniature versions of the adults. The entire life cycle usually completes within a single season, though under favorable conditions, the snails can remain active for extended periods.

The damage caused by these snails involves scraping the epidermis of leaves, young shoots, and tender plant tissues using their radula. The harmful effects include stunted growth in seedlings and the creation of entry points for fungal or bacterial infections in damaged tissues. Young plants and crops during flowering stages are particularly vulnerable.

Effective management requires an integrated approach to reduce population levels.

• Regular removal of organic debris to eliminate hiding spots for snails.
• Installation of physical barriers such as wood ash or lime around crop beds.
• Utilizing abrasive mulching materials like pine needles or coarse gravel.
• Strategic use of metaldehyde-based molluscicides in high-infestation zones when necessary.