UTTAR PRADESH JOURNAL OF ZOOLOGY

Lambda cyhalothrin and pretilachlor is widely used to control agricultural pest but also affect non target organisms like earthworms. The present laboratory study was conducted to determine the effect of Lambda cyhalothrin and Pretilachlor on biomass and histology of testis of Lampito mauritii. Lower and higher sub-lethal concentrations of Lambda cyhalothrin (T1 and T2) and Pretilachlor (T3 and T4) was mixed with soil substrate. Biomass was observed once in 10 days up to 90 days. 10 non clitellate L.mauritii was introduced into each treatment. Soil substrate without lambda cyhalothrin and pretilachlor served as control. The present study was revealed that lambda cyhalothrin and pretilachlor was highly affected the growth of L. mauritii. For histopathology study, four adult L. mauritii were introduced in to C, T1, T2, T3 and T4. After 5^th, 15^th and 30^th day, testis was dissected out. The results reported that histology of testis was highly damaged on 5^th and 15^th day of experiment than 30^th day.