Microbial & Agricultural Ecology and Biodiversity Conservation Laboratory, Department of Ecology and Environmental Science, Assam University, Silchar, 788011, Assam, India
The effect of two pesticides Paraquat and Fipronil on the soil and rhizosphere microflora of tea (i.e. fungi, actinomycetes and bacteria) was studied. The experiment was conducted over a period of 65 days and the observations were made at different interval of days (5, 20, 35, 50 and 65 days) respectively for both the rhizosphere and non rhizosphere soil. Paraquat and Fipronil had a transient negative effect on the rhizosphere and non rhizosphere soil microorganisms, however the negative effect was observed at the initial stage only. The dehydrogenase and phosphatase activity in the said soil also showed an inhibitory response at the initial stage but was able to recover with time.
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