• K. Swetha
• Dr M. Srinivasulu
• A. Madhavi
• Dr. V. Rangaswamy

To understand the effect of two insecticide, cypermethin and fenvalerate on the activities, of dehydrogenase, phosphatase and protease, the experiments have been conducted at different concentrations (1.0, 2.5, 5.0, 7.5 and 10.0 kg ha-1) of pesticides on under laboratory conditions in three cotton (gossypium arboreum l.) soils, collected from proddatur mandal, kdapa district of andhra pradesh, india. The dehydrogenase activity in terms of formazan formed from triphenyl tetrazolium chloride was more pronounced in cotton soils treated with 2.5 kg ha-1 of the cypermethrin and fenvalerate. But higher concentrations (5.0, 7.5 and 10 kg ha-1) were toxic to dehydrogenase activity. The activity of phosphatase in terms of p-nitrophenol fromed form p-nitrophenyl phosphate and protease activity in terms of tyrosin from formed 1% casein. Phosphatase and protease was higher in cotton soils, treated with cypermethrin and fenvalerate at 5.0 kg ha-1, but higher levels (7.5 and 10 kg ha-1) were toxic or innocuous to phosphatase and protease activity.

Keywords: Cypermethin, Fenvalerate, Dehydrogenase, Phosphatase, Protease, Cotton soil.

"Activities Of Dehydrogenase, Phosphatase And Protease As Influenced By The Cypermethrin And Fenvalerate To Cotton Soil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.477-486, May-2019, Available :http://www.jetir.org/papers/JETIR1905870.pdf

"Activities Of Dehydrogenase, Phosphatase And Protease As Influenced By The Cypermethrin And Fenvalerate To Cotton Soil", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp477-486, May-2019, Available at : http://www.jetir.org/papers/JETIR1905870.pdf