Influence of Combinations of Pesticides and Fertilizers on Aquatic Productivity

DOI: 10.4236/jep.2014.55046   PDF   HTML     4,079 Downloads   5,396 Views   Citations


We have examined the effects of environmentally realistic concentrations of widely used pesticides and fertilizers for rice paddy in Western Ghats regions of India on chlorophyll and zooplankton production using a laboratory mesocosm. Malathion (100 μg·L-1), Cypermethrin (25 μg·L-1), Nitrate-nitrogen (8 mg·L-1) and Phosphate-phosphorus (8 mg·L-1) in different combinations such as pesticide-pesticide and pesticide-fertilizer were tested in fully factorial manner for a period of 42 days. Study revealed that, chlorophyll production was supported by addition of fertilizers, while combinations of fertilizers with either one or two pesticides reduce the zooplankton density and diversity rendering chlorophyll concentration more than control groups. This could indicate the reason for eutrophication of ponds located in agro-ecosystems. Single application of combinations of pesticides (in spite of presence of fertilizers) even at low concentrations can produce severe negative effects on several taxonomic groups zooplankton living in small shallow water.

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Hegde, G. , Mandya, M. , Gokarnakar, S. , Babu, V. , Shivaramaiah, V. and Krishnamurthy, S. (2014) Influence of Combinations of Pesticides and Fertilizers on Aquatic Productivity. Journal of Environmental Protection, 5, 434-440. doi: 10.4236/jep.2014.55046.

Conflicts of Interest

The authors declare no conflicts of interest.


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