Hygromiid snails - Monacha spp.
Effective: November 6, 2020
Taxonomic Position: Stylommatophora : Helicidae, Hygromidae
Pest Type: Gastropods
Pest Code (NAPIS): IGDGCLA
This pest is a member of the following surveys: Mollusk
These Approved Methods are appropriate for: 2024, 2023, 2022, 2021, 2020
||NAPIS Survey Method
||See the visual inspection excerpt from the guidelines.
||3031 - General Visual Observation
Negative data for the genera Cernuella, Cochlicella, and Monacha can be entered at the genus level if no individuals of that genus are found in the sample and if the sampling method used will capture individuals of that genus if they are present in the environment from which that sample was taken. All species of these genera are exotic and not native to the U.S. All positives, regardless of genus, must be reported at the species level; no positive entries at the genus level are allowed.
The following are recommendations for executing the survey using the approved methods for pest surveillance. The recommendations are developed through literature review and consultation with subject matter experts.