Emmactin benzoate as a potential molluscicide against white garden snail, Theba pisana in association with biochemical defects

2022 ◽  
Author(s):  
Amira F. Gad
Keyword(s):  
Theba Pisana

Interactions between the land snails Theba pisana and Cernuella virgata in the laboratory

2020 ◽  
Author(s):  
Geoff H Baker
Keyword(s):  
Laboratory Experiments ◽  
Distribution Patterns ◽  
Land Snails ◽  
Snail Species ◽  
Agricultural Pests ◽  
Large Numbers ◽  
Small Scales ◽  
Novel Method ◽  
Theba Pisana ◽  
Inhibitory Components

ABSTRACT Two Mediterranean snails, Theba pisana and Cernuella virgata, are agricultural pests in southern Australia. The two species are rarely found together in large numbers in the field, at small scales (<1 m2). In laboratory experiments, the presence of T. pisana reduced the survival of C. virgata, but only when food (carrot + lettuce) was provided. When C. virgata was exposed to only the mucus trails and faeces of T. pisana, produced while feeding on lettuce, both the survival and activity of C. virgata were reduced. When carrot was substituted for lettuce, there was less effect. In addition, when C. virgata was exposed to T. pisana’s faeces only, derived from access to a mix of lettuce and carrot, there was no effect on C. virgata’s survival. The observed reductions in the survival of C. virgata were stronger in autumn (the breeding season for both snail species) compared with spring. Inhibitory components within the mucus trails of T. pisana may (1) help explain the observed distribution patterns of the two species at small scales in the field and (2) provide a novel method for control of pest populations of C. virgata, in some situations.

Physiological traits of land snails Theba pisana as simple endpoints to assess the exposure to some pollutants

2019 ◽  
Vol 26 (7) ◽  
pp. 6922-6930 ◽  
Author(s):  
Kawther S. El-Gendy ◽  
Mohamed A. Radwan ◽  
Amira F. Gad ◽  
Awatef E. Khamis ◽  
El-Sayed H. Eshra
Keyword(s):  
Land Snails ◽  
Physiological Traits ◽  
Theba Pisana

Soil surface temperature and mortality in land snails: implications for successful management

2003 ◽  
Vol 43 (11) ◽  
pp. 1351 ◽  
Author(s):  
V. Kempster ◽  
S. Charwat
Keyword(s):  
Laboratory Experiments ◽  
Control Strategies ◽  
High Surface ◽  
Soil Surface ◽  
Land Snails ◽  
Successful Management ◽  
Economic Problems ◽  
Surface Temperatures ◽  
Theba Pisana ◽  
Soil Surface Temperature

Three species of land snails, Theba pisana (Müller, 1774), Cernuella virgata (Da Costa, 1778) and Cochlicella acuta (Müller, 1774), introduced to Australia from the Mediterranean region, cause significant economic problems in harvested crops in southern Australia. One of the strategies for post-harvest control of these snails involves stubble management to knock the snails onto the hot ground during summer. Farmers report variable results with this strategy, which could be due to varying heat tolerances between the 3 species. In a series of laboratory experiments, field-collected snails of the 3 species were tested for their ability to survive high surface temperatures for varying periods of time. The results reported here indicate differences between the 3 species in their tolerance of soil surface temperatures, and suggest that the variable results noted in the field are due at least in part to the differing heat tolerances of the 3 species. When adult snails were placed in incubators at a constant temperature, all T. pisana died after 3 h at 55°C, while C. virgata and C. acuta survived longer, with 100% mortality only after 2 successive 6-h exposures at 55°C. Weight loss of snails was measured after heat treatment to estimate water loss under these conditions. Recommendations are made for more effective mechanical control strategies for snails in the field during summer.

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