Rajendra Prasad Mondal¹ , Anupam Ghosh² , Goutam Chandra³

1 Department of Zoology, Bankura Sammilani College, West Bengal, India
2 Department of Zoology, Bankura Christian College, West Bengal, India
3 Department of Zoology, Mosquito And microbiology Research Units, parasitology Laboratory, The University of Burdwan, Golapbag, Burdwan 713104. WEST BENGAL, India
Author    Correspondence author
Journal of Mosquito Research, 2014, Vol. 4, No. 4   doi: 10.5376/jmr.2014.04.0004
Received: 03 Mar., 2014    Accepted: 19 Mar., 2014    Published: 21 Apr., 2014

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.

Mondal et al., 2014, Mosquito Larvicidal Potential of Salicylic Acid and 3, 5-Di Nitro Salicylic Acid against Filarial Vector Culex quinquefasciatus, Journal of Mosquito Research, Vol.4, No.3 15-20 (doi: 10.5376/jmr.2014.01.0003)

The present study was carried out to evaluate the larvicidal activity of two organic acids, namely Salicylic acid and 3, 5-Di Nitro Salicylic Acid against larvae of Culex quinquefasciatus. Bioassay experiments with graded concentrations (50 ppm, 100 ppm, 150 ppm, 200 ppm and 250 ppm) of these organic acids were used against third instars larvae of Cx. quinquefasciatus at 24 hour, 48 hour and 72 hour of exposures to ensure their larvicidal potentiality.  The results of bioassay experiments showed highest mortality rate at 72h of exposure period for both the compounds. The toxicity of Salicylic Acid was higher than the 3, 5- Di Nitro Salicylic Acid. Regression analysis revealed that the mortality rate (Y) was positively correlated with the concentrations of the compounds (X). Respective Lethal toxicity values (LC₅₀ values and LC₉₀ values) gradually decreased with the exposure period. The effects of these organic acids were also tested on non target organisms such as Anisops sardea, larvae of Toxorhynchites sp. Chironomus sp. and Tadpole. There was no significant mortality occurred in non-target organism within 72h of exposure period. The results support that Salicylic acids and its Nitro derivatives can effectively be used in mosquito breeding places to reduce the density of mosquito immatures. 

 

Culex quinquefasciatus; Larvicidal; Regression analysis; Lethal toxicity