Aliphatic Amide from Seeds of Carica papaya as Mosquito Larvicide, Pupicide, Adulticide, Repellent and Smoke Toxicant  

Anjali Rawani1 , Anupam Ghosh2 , Subrata Laskar3 , Goutam Chandra1
1. Mosquito and microbiology Research Units, Department of Zoology, The University of Burdwan, West Bengal, India
2. Department of Zoology, Bankura Christian College, Bankura-722101, West Bengal, India
3. Natural Product Laboratory, Department of Chemistry, The University of Burdwan, West Bengal, India
Author    Correspondence author
Journal of Mosquito Research, 2012, Vol. 2, No. 2   doi: 10.5376/jmr.2012.02.0002
Received: 19 Oct., 2012    Accepted: 24 Oct., 2012    Published: 25 Oct., 2012
© 2012 BioPublisher Publishing Platform
This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Rawani et al., 2012, Aliphatic Amide from Seeds of Carica papaya as Mosquito Larvicide, Pupicide, Adulticide, Repellent and Smoke Toxicant, Journal of Mosquito Research, Vol.2, No.2 8-18 (doi: 10.5376/jmr.2012.02.0002)


Crude and solvent extracts of seed extract of Carica Papaya was investigated for anti-mosquito potential, including larvicidal, pupicidal, adulticidal, smoke toxicity and repellent activities against Culex quinquefasciatus and Anopheles stephensi, the vector of filaria and malaria respectively. The mortality rate of 3rd larval instars of Cx. quinquefasciatus and An. stephensi at 0.5% concentration was significantly higher (p < 0.05) than the mortality rates at 0.1%, 0.2%, 0.3% and 0.4% concentrations of crude extract. Among the solvent extracts, the petroleum ether extract showed the highest mortality at 100 ppm with LC50 and LC90 values of 31.16 ppm and 341.86 ppm against Cx. quinquefasciatus; 18.39 ppm and 250.76 ppm against An. stephensi. In testing for pupicidal activity, this plant extract exhibited a slightly pupicidal potency with LC50 values of 86.53 ppm and 72.16 ppm against Cx. quinquefasciatus and An. stephensi respectively. It showed repellency against the adult females of both mosquito species with 78% and 92% protection respectively. It also provided biting protection time of 4 h and 5 h respectively against Cx. quinquefasciatus and An. stephensi. In adulticidal activity there is 70% and 63.3% death of adult mosquito against Cx. quinquefasciatus and An. stephensi after 72 h. The smoke toxicity test showed that out of 200 adult mosquitoes 190 adult mosquito of Cx. quinquefasciatus and 186 mosquito of An. stephensi dropped down at the floor after 5 h of smoke. One toxic compounds was detected having Rf = 0.853 (80% and 83% mortality in 24 h respectively for Cx. quinquefasciatus and An. stephensi). IR analysis provided preliminary information about the polyhydroxy aliphatic amide nature of the active ingredient.

Culex quinquefasciatus; Anopheles stephensi; IR analysis; Larvicidal activity; Carica papaya; Non-target; Pupicidal activity; Repellent; Smoke toxicity; Adulticidal activity
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