Int.J.Curr.Microbiol.App.Sci (2017) 6(11): 372-378 372 Original Research Article https://doi.org/10.20546/ijcmas.2017.611.042 Screening of Potassium Releasing Rhizospheric Isolates for Agrochemicals Compatibility Y. Nagaraju 1* , S. Triveni 1 , R. Subhash Reddy 1 and B. Vidyasagar 2 1 Department of Agricultural Microbiology, PJTSAU, Rajendranagar, Hyderabad-30, Telangana, India 2 Department of Plant Pathology, PJTSAU, Rajendranagar, Hyderabad-30, Telangana, India *Corresponding author ABSTRACT Introduction Pesticides are the important agrochemicals used for prevention of crops from pests. Their use has been hiked during last few decades. The indiscriminate use of pesticides disturbs the soil environment by affecting flora and fauna including microflora of soil, and also the physicochemical properties of soil like pH, salinity, alkalinity leading to infertility of soil (Sarnaik et al., 2006). The production of pesticides started in India in 1952 with the establishment of a plant for the production of BHC near Calcutta, and India is now the second largest manufacturer of pesticides in Asia after China and ranks twelfth globally (Mathur, 1999). Pesticide application is still the most effective and accepted means for the protection of plants from pest (Bolognesi, 2003). But the extensive use of pesticides over the past four decades has resulted in tribulations caused by the interaction with natural biological system (Ayansina and Oso, 2006). Application of fungicides may harmfully effect the non-target soil microflora (Ayansina and Oso, 2006), especially when these fungicides are used in conjunction with microbial inoculants they cause damage to the inoculants by affecting the bacterial infection to the root hair, nodule formation and International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 6 Number 11 (2017) pp. 372-378 Journal homepage: http://www.ijcmas.com In the present investigation, an attempt was made to assess the compatibility of six agrochemicals such as Fungicides (Metalaxyl and Tricyclazole), Insecticides (Profenophos and Chloranthraniliprole) and Herbicides (Glyphosate and Atrazine) against five potassium releasing bacterial and two fungal isolates from Rajendranagar, Hyderabad. Compatibility tests indicated that glyphosate has much severe effect on microbial biomass at low, recommended and double doses. Among insecticides Profenophos have much more effect than Chloranthraniliprole. Among fungicides Metalaxyl exerted more effect on the microbial growth, whereas among herbicides glyphosate stands out to effect microbial load. Among all isolates KSB-1, 4 and 5 were found to be susceptible for fungicides KSF-2 is susceptible for insecticides KSF-1 and 2 are moderately susceptible for herbicides. Keywords Potassium releasing bacteria and fungi, Cloropyrifos, Chlorantraniliprole, Metalaxyl, Tricyclazole. Accepted: 07 September 2017 Available Online: 10 November 2017 Article Info