Effect of leaf essential oil of Coccinia indica on egg hatchability and different larval instars of malarial mosquito Anopheles stephensi

Abstract

The present finding suggest that the C. indica leaf essential oil provided an excellent potential for controlling An. stephensi mosquito at earlier stage of their life cycle.

Inhibition of the growth and development of mosquito larvae of Culex pipiens L. (Diptera: Culicidae) treated with extract from flower of Matricaria chamomilla (Asteraceae)

“…Regarding the effect on egg hatchability, M. chamomilla showed potent egg hatching inhibition activity, which will be an additional advantage to the larvicidal activity of M. chamomilla extract. The present study is comparable with earlier reports of Coccinia indica leaf extract which inhibited the egg hatching activity of Anopheles stephensi (Rajkumar et al 2011). In our present study, the mode of action of egg hatching inhibition and larvicidal activity of ethyl acetate…”

“…M. chamomilla bioactive molecules were concentrated in the ethyl acetate extract. These findings were consistent with earlier findings that reported a correlation of levels of potency of plant extracts with the type of solvent used in the extraction of bioactive molecules for the control of mosquito species (Mavundza et al 2014;Rajkumar et al 2011;Thongwat et al 2017).…”

“…The present study is comparable with earlier reports of Coccinia indica leaf extract which inhibited the egg hatching activity of Anopheles stephensi (Rajkumar et al . ). In our present study, the mode of action of egg hatching inhibition and larvicidal activity of ethyl acetate extract was not investigated, but reports have revealed that plant extracts may cause indurations of the egg shell, interfering in water and gas exchange (Hoskins ), or by interfering with proton transfer in mitochondria resulting in larval mortality (Usta et al .…”

Impact ofCymbopogon flexuosus(Poaceae) essential oil and primary components on the eclosion and larval development ofAedes aegypti(Diptera: Culicidae)

“…On the inner side of the endo-chorion is a serosal cuticle, which is formed during the embryogenesis process and protects the embryo from external factors like desiccation or the presence of bacteria or insecticides (Rezende et al 2008). However, this serosal cuticle can be disrupted by lipophilic substances (Rajkumar et al 2011) like terpenes citral and geranyl acetate, major compounds of C. flexuosus EO. The hatching inhibition by these terpenes is due to an interruption of embryo development caused by physiological alterations in water and gas exchanges, enzymatic modifications, and hormonal changes.…”

Bio Efficacy of Spathodea Campanulata P.BEAUV.(BIGNONIACEAE) Hexane Leaf Extract Against Dengue and Zika Virus Vector Aedes Aegypti (Diptera:culicidae).

“…(Saranya et al, 2018); in the case of ovicidal activity, exposure of freshly laid eggs was more effective than that of the older eggs (Miura et al,1976).The hexane leaf extract of S.campanulata treated eggs exhibited an allayed hatchability and this may be due to the action of phytochemicals present in the extract. The extract may inhibit the hatchability of the eggs by interfering with their chorion (Rajkumar et al,2011). Any compound that can cause permeability or a disruption to the chorionic layers in order to effectively deliver compounds that can terminate embryogenesis can be considered for development of effective ovicides.…”