author(s)
Nazia Khalil, Muhammad Kashif Zahoor, Qazi Adnan Ahmad and Sumaira Parveen

abstract
Study was conducted to ascertain the effect of various pyrethroid viz., Cypermethrin (@ 0, 130,150 and 200mg/kg), Deltamethrin (@ 0, 20,25 and 30 mg/kg), Permethrin (@ 0, 150, 250 and 350 mg/kg) and Lambda Cyhalothrin (@ 0, 30,50,and 70 mg/kg) on physical traits on same aged male albino rat (Rattus norvegicus) in research laboratory of Govt. College University, Faisalabad, Punjab, Pakistan under controlled conditions (25+ 1^oC, 70 + 5% RH, 12 h day: night regimes) during 2016 and 2017 following CRD replicated thrice. The observation regarding body weight, liver weight, kidney weight, relative liver weight, relative kidney weight (Physical traits). The results revealed that reduction in body weight and organ weight were observed in the application of some pyrethroids at all dose rates and post treatment intervals.