Effects of pesticide Glyphosate ( Roundap® formulation) on periphyton community in artificial stream
Publish place: First National Conference on Medicinal Plants, Traditional Medicine and Organic Agriculture
Publish Year: 1393
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:
HBHEAITH01_066
تاریخ نمایه سازی: 7 بهمن 1393
Abstract:
In recent years, commercial glyphosate herbicide formulations have been widely used in agriculture to control aquatic weeds. These pesticides may result in disruption of ecological balance, causing damage to non-target organisms including fish, diatoms and other aqutice organisms. We assessed the effect of the commercial formulation Roundup® using artificial steram , An experiment was carried out using indoor experimental channels (artificial streams) to assess the long-term effect (20 days) of pesticide on periphyton communities exposed to low levels of Glyphosate (Roundap® formulation),The herbicide was added at four doses: a Control (without Roundup) and three treatments of 20,40 and 60 mg Lˉ¹ of the active ingredient (glyphosate). The effects of Glyphosate on community biomass were assessed by measuring dry mass, ash-free dry mass (AFDM), autotrophic index (AI) and chlorophyll a factors. In artificial streams with Roundup, there was a significant (p <0.05) reduction of chlorophyll a compared to controls. Roundup produced a clear delay in periphyton colonization in treated artificial stream and values of the periphyton mass variables (dry mass, ash-free dry mass (AFDM) and chlorophyll a ) were always higher in control channel Compared channeles with low and medium herbicide concentration.
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Authors
Mozafar Sharifi
Associated Prof., Department of Biology, Faculty of Science ,Razi Unoversity of Kermanshah
Loghman Yousefizadeh
MSc. Student of Plant Ecology, Faculty of Science, Razi University of Kermanshah
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