Chondrina

Systematic position: Chondrina (lat. Chondrina) belongs to the phylum Mollusca, class Gastropoda, and the family Chondrinidae. These are terrestrial pulmonate snails typically found in habitats with high humidity levels and calcareous soils, which are essential for their shell development.

Biology and life cycle: The life cycle of Chondrina is highly dependent on environmental moisture. As hermaphrodites, they lay eggs in damp soil or beneath organic matter. The offspring develop rapidly, feeding on vegetation immediately after hatching, which allows the population to increase significantly during warm and wet growing seasons.

Nature of damage: These pests are primarily nocturnal, feeding at night or during overcast, rainy days. They utilize a specialized rasping organ called a radula to scrape the epidermis from leaves and stems. This results in irregular holes and skeletal leaf damage, which hinders plant growth and reduces overall health.

Economic impact: Chondrina can be particularly devastating to young seedlings, vegetable crops, and ornamental plants. Their presence in greenhouses or nurseries is especially problematic, as these environments provide the stable, humid conditions they need to thrive, potentially causing severe economic loss if infestation levels remain unchecked.

Control measures: Effective management of Chondrina involves several cultural and chemical strategies:

• Implementing proper field drainage to reduce surface soil moisture.
• Removing piles of plant debris, mulch, and wood where snails take refuge during the day.
• Creating physical barriers using abrasive materials like crushed eggshells or wood ash.
• Applying commercial molluscicides containing iron phosphate or metaldehyde according to local regulations.