• Dr. Niti Chawla
• Pratibha

In the present study, the effect of different concentrations of Malathion (0.1ppm, 1ppm, 10ppm and 100ppm), an organophosphate pesticide was evaluated in the laboratory in the soil collected from vegetable (okra) cultivated field of Bawani khera, Bhiwani. Microbial populations (bacterial and actinomycetes populations) and enzymatic activities (amylase, invertase, acidic phosphatase and alkaline phosphatase) were assessed after every seven days of incubation with a total period of 21 days. Concentration upto 1ppm enhanced the bacterial and actinomycetes populations and thus found to be beneficial but higher concentrations i.e.10 ppm and 100 ppm showed reduction in the microbial populations, as well as in the activities of invertase, acidic phosphatase and alkaline phosphatase enzymes. Actinomycetes population was found to decrease by 11%, with the concentration of 10 ppm and bacterial populations was observed to be slightly affected by that concentration. Concentration of 100 ppm affected bacterial as well as actinomycetal populations which were decreased by 30% and 39% respectively. Similar trend of reduction was also observed in the enzymatic activities. Invertase, alkaline phosphatase and acidic phosphatase activities showed overall reduction of 19% 30%, 23% with the application of 10 ppm and 45% 64%, 49% with the application of 100 ppm respectively. Amylase activity was found not to be affected by even higher concentrations.

Pesticide, Malathion, Bacteria, Actinomycetes, Amylase, Invertase, Phosphatase

"EVALUATION OF THE EFFECT OF MALATHION PESTICIDE ON MICROBIAL POPULATIONS AND ENZYMATIC ACTIVITIES IN VEGETABLE CULTIVATED SOIL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.195-202, June-2019, Available :http://www.jetir.org/papers/JETIR1908969.pdf

"EVALUATION OF THE EFFECT OF MALATHION PESTICIDE ON MICROBIAL POPULATIONS AND ENZYMATIC ACTIVITIES IN VEGETABLE CULTIVATED SOIL", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp195-202, June-2019, Available at : http://www.jetir.org/papers/JETIR1908969.pdf