Fumigant Toxicity and Feeding Deterrent Activity of Essential Oils from Lavandula dentata, Juniperus procera, and Mentha longifolia against the Land Snail Monacha obstructa

Abstract

Land mollusks are one of the most destructive agricultural pests worldwide, the management of which depends on synthetic molluscicides. However, many of these molluscicides are harmful to nontarget organisms. Hence, there is a need to develop alternative ecofriendly molluscicides that are less impactful toward nontarget organisms. So, an investigation into the fumigant toxicity and feeding deterrent effect of essential oils (EOs) from Lavandula dentata L. (Lamiaceae), Juniperus procera Hochst. (Cupressaceae), and Mentha longifolia (L.) Huds. (Lamiaceae) against the land snail Monacha obstructa (Pfeiffer, 1842) (Hygromiidae) was performed. L. dentata EO exhibited the highest fumigant toxicity with LC50 values of 8.68 μL/L air and 7.24 μL/L air after 24 h and 48 h exposure periods, respectively. Its main components were camphor, 1,8-cineole, fenchone, and β-myrecene. The fumigant toxicity of J. procera EO was lower than that of L. dentata, with LC50 values of 25.63 μL/L air and 20.11 μL/L air after 24 h and 48 h exposure periods, respectively. The major constituents of J. procera EO were α-pinene, p-cymene, and β-ocimene. The analysis of M. longifolia EO showed that pulegone, and menthol were the major constituents. However, it displayed no fumigant toxicity up to 50 μL/L air. The three EOs exhibited a strong feeding deterrent effect at sublethal concentrations. The EOs extracted from L. dentata, J. procera and M. longifolia are promising ecofriendly botanical molluscicides against the land snail M. obstructa.

Effect of Sub-lethal Exposure of Essential Oils of Various Plant Origin Mollusccides on Different Biochemical Parameters of Vector Snail Lymnaea acuminata

“…It is clear from the present study that the essential oils of plant-origin molluscicides which were used earlier in aquarium water directly against harmful snails L. acuminata, when exposed was effective selectively in a similar manner in killing them [39,40]. It has been observed previously that many of the essential oils extracted from different plants exhibit potent molluscicidal as well as repellent activities against snails of economic importance [41][42][43][44]. It is clear from the above discussion that essential oils have potent molluscicidal properties against the snail hosts of different flukes.…”

Evaluation the efficacy of Ethanol Extract Derived from Wild Mint on the Life Parameters of the Aphis fabae (Hemiptera: Aphididae) (Sco-poli) under laboratory conditions

“…This effect can be attributed to the chemical compounds present in the plant extract, which have been studied in previous research conducted in Iran, Greece, Tunisia, and South Africa. These studies identified dominant compounds in the essential oils, such as Cicarveol (53-78%), Carvone (55%), Menthol (33%), and Menthone (31-48%) [2,22,23]. Additionally, Pulegone is considered one of the most abundant compounds in the essential oils of wild mint [24] [25].…”

Lavandula dentata Essential Oils: A Bio-Insecticide for an Agroecological Approach to Protecting Chickpea Seeds against Callosobruchus maculatus

“…[13][14][15] Lavandula's repellent and insecticidal properties against various insect pests have been studied. 16 In this study, the insecticidal activity of essential oils of L. dentata against Callosobruchus maculatus and its impact on chickpea seeds were evaluated.…”