Control of the glassy clover snails Monacha cartusiana using Zingiber officinale extract as an ecofriendly molluscicide

Abstract

High population densities of Monacha cartusiana were observed to cause perdition of various economic crops at Sharkia Governorate. The present study was carried out control this harmful pest using ethanolic Ginger extract as a natural and environmentally safe molluscicide.Toxicological tests revealed that low concentration (20%) of ethanolic Ginger extract caused 10 % mortalityof cloversnails after one day of exposure and 66.7% mortalityafter28 days. The highest mortality percentage (90 %) was recorded after 28 days of treatment with40% Ginger extract. Biochemical investigations showed thatLC 25 (7.04%) Ginger extract elevated ALT, AST, α & β esterases andphenoloxidase levels of treated snails compared to control.Histological inspections of the digestive gland and ovotestis of snails exposed to LC 25 Ginger extract revealed that the digestive tubules showedvarious tubularanomalies, inflammatory hemocytes infiltration, excessive luminal secretionsand appearanceof necrotic areas. Acini of ovotestis weredeformedand comprised misshapen eggs and distorted sperms.TEM investigations showed cellular malformations in the digestive gland of treated snails including; severely disrupted microvilli, ruptured cell membranes, fractured RER and mitochondrial pyknosis.

Impact of contamination on biology, biochemical, and histology ofEobania vermiculataandMonacha obstructaduring different seasons in Ismailia, Egypt

“…The normal histological structure of E. vermiculata observed in the current study was similar to that described by Abd El-Atti et al (2019; 2020) and Kandil et al (2020). Histopathological alterations in samples showed that gonad follicles had lost their normal architecture with degeneration of some stages of spermatogenesis and oogenesis.…”

“…Histological investigations into the digestive gland of two species in the current study confirmed the presence of three main cell types; digestive, calcium, and excretory cells forming the epithelial wall of the digestive tubules. This finding was in harmony with the findings of other authors who observed these kinds of cells in E. vermiculata (Abd El-Atti et al, 2020), H. pomatia (Chabicovsky et al, 2004), H. aspersa (Snyman et al, 2005), H. vestalis (Sharaf et al, 2015) and M. cartusiana (Abd El-Atti et al, 2019).…”

“…In the current data, it was noticed that the histological structure of the gonads and digestive gland of two species of land snails at the two studied sites were more or less similar to each other. The current study’s description of the digestive gland’s histological composition matched that of other researchers (Hamed et al, 2007; Abo-Bakr, 2011; Abd El-Atti et al, 2019). They studied the toxicological and histological changes of the digestive gland of E. vermiculata .…”

Effect of Eucalyptus globulus oil and Ricinus communis methanolic extract as potential natural molluscicides on the reproductive biology and some antioxidant enzymes of the land snail, Theba pisana

“…Chemical molluscicides used for long times in controlling land snails have many disadvantages such as disruption of natural biological control systems, undesirable effects on non-target organisms and development of pests’ resistance to synthetic insecticides ( Ismail et al., 2015 ; Abd El-Atti et al., 2019 ). About 25 million of agricultural workers were poisoned by pesticides in developing countries every year ( Farag, 2017 ).…”

“…Several local but exotic plant species in Egypt are screened and demonstrated potential molluscicidal activities against different species of snails ( Abd El-Atti et al., 2019 ). Exotic Eucalyptus globulus (Blue gum trees) native to Australia and endogenous Ricinus communis (Castor) are cosmopolitan plants growing wildly on stream banks at Sharkia Governorate and their products can be obtained easily by farmers for controlling extensive populations of T. pisana snails.…”