Abstract
Pymetrozine is an insecticide that is widely used, causing severe environmental problems. This study determined the pymetrozine degradation by an enrichment culture of microorganisms from paddy soil. The results showed that the enrichment culture utilized 67.3 ± 10.1% of the pure substrate as the sole carbon and nitrogen source in liquid media after 36 h. However, the utilization rates of pymetrozine in herbicide were lower than those of the pure substrate. The maximum utilization rates of pure pymetrozine and pymetrozine in herbicide were 0.051 ± 0.006 and 0.039 ± 0.004 mmol/h, respectively. During the degradation, the metabolites 4-amino-6-methyl-4,5-dihydro-2H-[1,2,4]triazine-3-one and nicotinic acid were produced and then further degraded. In addition, the inoculation of a fungal strain, Phanerochaete sp. Th1, which degraded rice straw components, increased pymetrozine degradation in rice straw and soil. The study provides essential information on pymetrozine degradation in liquid media, rice straw during solid-state fermentation, and soil.
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Duc, H.D., Oanh, N.T. Pymetrozine Degradation by an Enrichment Culture from Paddy Soil. Microbiology 93, 324–332 (2024). https://doi.org/10.1134/S002626172360249X
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DOI: https://doi.org/10.1134/S002626172360249X