• Dr.S.V.Subba Reddy
• Dr.M.Sudhakara Reddy
• Dr.M.Muniya Naik
• V.Uday Kiran
• G.Harilakshmi

The chemical pesticides are influencing much on the populations of non-target organanisms like fishes and amphibians. Frogs have served as important model organisms throughout the history of science and the importance of frogs ecologically, economically and academically has prompted me to take up the study. In the present study Healthy frogs, Rana tigrina weighing 50 ± 3 gms were collected from the pond, acclimated to the laboratory conditions in large glass aquaria with water. The frogs were divided into groups of ten animals. They were exposed to different pesticide concentrations of fenvalerate, both commercial and technical grade, according to biomass ratio as suggested by Doundroff et al., (1951). In The percent study Frogs were exposed to different concentrations of commercial and technical grade of fenvalerate for 24, 48 and 72 hours. The present findings also agree with the previous reports that the commercial grade pesticides are relatively more toxic than the technical grade pesticides (Pickering et al., 1962). From all the observations, it is inferred that the LC50 values were not constant for a group of insecticides or any particular group of animals and it varies from species to species with alteration in the chemical and physical factors.

Fenvalerate (both commercial and technical grade), LC50, Rana Tigrina (Indian Bull Frog),

"MORTALITY OF RANA TIGRINA IN DIFFERENT CONCENTRATIONS OF FENVALERATE, TECHNICAL AND COMMERCIAL GRADE AT 24, 48 AND 72 HOURS OF EXPOSURE.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.150-161, March-2019, Available :http://www.jetir.org/papers/JETIR1903625.pdf

"MORTALITY OF RANA TIGRINA IN DIFFERENT CONCENTRATIONS OF FENVALERATE, TECHNICAL AND COMMERCIAL GRADE AT 24, 48 AND 72 HOURS OF EXPOSURE.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp150-161, March-2019, Available at : http://www.jetir.org/papers/JETIR1903625.pdf