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Short Communication | Microbiology | Niger | Volume 12 Issue 10, October 2023
Differential Toxicity Effects of Herbicides on the Growth of Soil Bacteria and Fungi
Marcus Oluyemi Bello
Abstract: The aim of the present study is to determine the in-vitro responses of selected bacteria and fungi to different concentrations of commonly used herbicides (paraforce and glyphosate). The inhibitory effects of five different concentrations (1.0, 0.5, 0.25, 0.125, and 0.062 standard field dose (sfd)) of herbicides (paraforce and glyphosate) on the growth of two bacteria (Staphylococcus aureus and Pseudomonas cepacia) and two fungi (Aspergillus niger and Penicillum citreonigrum) were assessed using spectrophotometer at 620 nm and diameter of growth of fungi were measured on potato dextrose agar after incubation, respectively. The glyphosate inhibited the growth of both S. aureus and P. cepacia after eight hour irrespective of the concentrations used while the growth of the two bacteria are unaffected by paraforce irrespective of the concentrations. For the A.niger and P. citreonigrum, the diameter of growth increased with time, irrespective of the concentrations of glyphosate while the diameter of growth of fungi decreased with increased concentration of the paraforce compared to glyphosate and controls.The effects of herbicides on soil bacterial and fungal growth depend on the chemicals composition, concentrations and microbial species.Herbicides has differential effects on soil bacteria and fungi.
Keywords: glyphosate, paraforce, bacteria, fungi, growth, soil
Edition: Volume 12 Issue 10, October 2023,
Pages: 1050 - 1054