ISSN: 2640-7930
Global Journal of Zoology
Research Article       Open Access      Peer-Reviewed

Laboratory Evaluation of Certain Essential Oils for Their Larvicidal Activity against Aedes Albopictus, Vector of Dengue and Chikungunya

Varun Tyagi1*, Ruchi Yadav2 and Vijay Veer1

1Medical Entomology Division, Defence Research Laboratory, Tezpur- 784001, Assam, India
2Pharmacology &Toxicology Division, Defence Research & Development Establishment, Gwalior-474002, Madhya Pradesh, India
3Defence Research Laboratory, Tezpur- 784001, Assam, India
*Corresponding author: Shashibhal M Pandey, Department of Zoology, Smt. C. H. M. College, Ulhasnagar- 421003, Thane, Maharashtra, India, E-mail:
Received: 12 December, 2016 | Accepted: 29 December, 2016 | Published: 30 December, 2016
Keywords: Essential oils; Aedes Albopictus: Larvicidal activity

Cite this as

Tyagi V, Yadav R, Veer V (2017) Laboratory Evaluation of Certain Essential Oils for Their Larvicidal Activity against Aedes Albopictus, Vector of Dengue and Chikungunya. Glob J Zool 1(1): 003-006. DOI: 10.17352/gjz.000002

Mosquito borne diseases including malaria, filariasis, dengue, chikungunya and various forms of encephalitis impose enormous menace to human as well as animals. These diseases cause large number of mortality and morbidity across the world. The principal strategy for combating these diseases is the vector control including the use of larvicide against the immature stages of mosquitoes. Use of essential oils as mosquito repellent has been recommended by various studies but their role as larvicide is studied by only a few workers. In the present study, we have evaluated certain essential oils namely; Amyris, Black pepper, Cinnamon, Dill, Jasmine, Juniper and Thyme oils, against Aedes Albopictus for their larvicidal activity. These essential oils have shown significant larvicidal activity. These oils were shown to have LC50 values in the range of 10.5 to 62.7 ppm against larvae Ae. albopictus. Out of these seven oils the Dill oil was found to show the least LC50 value against Ae. albopictus.


Mosquito-borne diseases cause significant human health problems, and their incidence has increased significantly within last two decades. These diseases profoundly restrict socioeconomic status and development in countries with highest rates of infection, many of which are located in the tropics and subtropics. Vector-borne infectious diseases, such as malaria, filaria, dengue fever, chikunguniya yellow fever, and various forms of viral encephalitis, share a major fraction of the global infectious disease burden. Indeed, nearly half of the world’s population is infected with one or other type of vector-borne pathogen [1,2]. Estimates from the world health organization indicate that three mosquito borne diseases malaria, filarial and dengue are among the leading cause of morbidity and mortality in developing countries around the world. Dengue fever virus, particularly its hemorrhagic form, is a threat to more than 2.5 billion people, with an annual incidence in the tens of millions and about 24,000 deaths per year.

Numerous approaches have been developed to control the mosquitoes, in which the mosquito control at larval stage is considered as an efficient approach in the integrated vector management. Existing mosquito control methods are based on synthetic insecticides. Synthetic insecticides are the first line of action due to their quick action, but continuous use of synthetic insecticides may be lead to the development of resistance in vectors and adverse effect on environment. These factors have created a need for search of simply biodegradable alternative insecticides. The use of plant extracts for vector control has several appealing features as they are biodegradable, less hazardous and rich stock house of chemicals of diverse biological activity. Earlier works of several authors revealed that botanicals can have strong larvicidal [3-9] oviposition deterrent and ovicidal activity [10-14]. In the present study essential oils of seven plants were tested against third instar larvae of Ae. albopictus. The study of larvicidal activity is useful for identification of effective essential oils for controlling mosquito borne diseases.

Materials and Methods


Ae. albopictus mosquitoes colony was maintained in our laboratory at 27±2°C temperature, 12:12 light dark photoperiod and 70±5 % relative humidity. Larvae of Ae. albopictus were maintained in plastic tray by providing yeast powder as larval food. Adult mosquitoes were reared in wooden cages (30 x 30 x 30 inches) and were provided cotton soaked with 10% sugar solution. Ae. albopictus females were offered blood, once in a week.

Essential oils

Seven essential oils were obtained from Fragrance and Flavour Development Center (FFDC), Kannuj, Uttar Pradesh (Table 1).

Larval bioassay

Larvae of Ae. albopictus were collected from stock culture. Larval bioassay was carried out as per WHO [15,6] procedure in four replications for each concentration. Twenty, early third instar larvae of Ae. albopictus were inoculated in glass beakers (250 ml) containing 100 ml tap water. Different doses of essential oils ranging from 10, 20, 50 and 100 ppm in acetone were prepared. Larvae of mosquito were treated with 1 ml of test solution for each concentration and controls were treated with acetone. Larval mortality was recorded after 24 hrs, of exposure. To determine the lethal concentration (LC50) for each essential oil, data were analyzed by probit analysis [16] using POLO PC software.

Results and Discussion

In the present study, different concentrations of the essential oils viz. 10, 20, 50 and 100 ppm on the larvicidal activity against Ae. albopictus were show in (Table 1, Figure 1) and the data revealed that the highest larval mortality with LC50 value was 10.52 ppm observed in Dill oil, whereas the lowest mortality with LC50 value was 62.78 ppm in Black Pepper oil. LC50 value of other essential oils against Ae. albopictus was also observed, the LC50 value of Amyris oil, Thyme oil, Jasmine oil, Juniper oil and Cinnamon oil was 39.8, 45.58, 49.99, 53.22 and 60.31 ppm respectively (Table 2, Figure 1). Out of these seven oils the Dill oil was found to show the least LC50 against Ae. albopictus.

In the present study results showed that the mortality of the mosquito larvae increased as the doses of the sample were increased. Another study has showed that, the plant oil formulation was used for larvicidal activity against different mosquito species [17]. A recent study prove that Vernonia cinerea and C. viminallis leaf extracts have the potential to be used as larvicide and P. juliflora as an oviposition-deterrent for the control of Ae. albopictus mosquito [5]. In another study results indicate that leaf extracts of three invasive weeds- Vernonia cinerea, Prosopis juliflora and, Cassia tora can be an ecofriendly larvicide for An. stephensi [3]. Besides this repellent activity of essentials oils against different mosquito species have evaluated by many researchers [18-21]. Plant extract might have complex blend of biocidal active compounds, including flavonoids, phenolics, terpenoides and alkaloids which may jointly or separately contribute to mortality and late growth of mosquito larvae. Other study reported that acetone extracts have maximum amount of phenols and flavonols, while extracts of methanol have flavones, terpinoids, tannins and polyphenols [22], which contains larvicidal activity of mosquito. Mode of action and site of effect for larvicidal phytochemicals has received slight attention. Ray et al., [23] and David et al., [24] found that botanical derivatives primarily affect the midgut epithelium and secondarily affect the malpighian tubules in mosquito larvae. The efficiency of phytochemicals against mosquito larvae can differ significantly depending on species of plant, plant parts used, age of plant parts, solvent used during extraction as well as upon the available vector species of mosquito. Sukumar et al., [25] have described the existence of variations in the level of effectiveness of phytochemical compounds on the mosquito species in respect of plant parts from which these were extracted, responses in species and their developmental stages against the particular extract, solvent of extraction, geographical origin of the plant species, photosensitivity of some of the compounds in the plant extract, effect on growth and reproduction. Further, it was observed that many larvae were failed to ecdyze to perfect pupae producing larval-pupal intermediate [26]. The results of this study are very promising in creating new efficient and reasonable approaches to the control of vector mosquitoes.

The authors are thankful Director, DRDE, Gwalior, Madhya Pradesh, India for interest and providing all necessary facility to conduct this research work. Help rendered by staff Vector Management Division while for carrying out the work is deeply acknowledged.

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