Garden Snail Predatory Insects' Modus Operandi Under Laboratory Conditions

Area of Science:

• Agricultural Entomology
• Pest Management
• Malacology

Background:

• Heliciculture farms face significant biotic challenges, including predation by insects.
• Insect predation can result in characteristic shell damage to snails, aiding in predator identification.
• Cornu aspersum (common garden snail) is a key species in snail farming.

Purpose of the Study:

• To investigate the predatory activity of specific insect species on Cornu aspersum.
• To identify which insect predators cause characteristic shell damage to C. aspersum.
• To provide insights for recognizing snail shell damage in the absence of predators.

Main Methods:

• Laboratory analysis of predatory behavior of four Coleoptera species (Silpha tristis, Ocypus olens, Carabus morbillosus constantinus, Lampyris sardiniae) against Cornu aspersum.
• Testing of both adult and larval stages, with the exception of Lampyris sardiniae (larvae only).
• Observation and documentation of shell damage inflicted on C. aspersum.

Main Results:

• Only two insect species, Carabus morbillosus constantinus and Ocypus olens, were observed to damage the shells of Cornu aspersum.
• Silpha tristis and Lampyris sardiniae larvae did not cause observable shell damage in this study.
• The specific types of shell damage inflicted by C. morbillosus constantinus and O. olens were noted.

Conclusions:

• Carabus morbillosus constantinus and Ocypus olens are identified as significant shell-damaging predators of Cornu aspersum.
• Recognizing specific shell lesions can aid in identifying these predators in heliciculture settings.
• This research contributes to pest identification and management strategies in snail farming.