Non-target Impact of Dinotefuran and Azoxystrobin on Soil Bacterial Community and Nitrification

• Published in: Bulletin of environmental contamination and toxicology Vol. 106; no. 6; pp. 996 - 1002
• Main Authors: Yamaguchi, Taku, Mahmood, Ahmad, Ito, Takahide, Kataoka, Ryota
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2021; Springer Nature B.V
• Subjects: Ammonia; Ammonium; Ammonium salts; Aquatic Pollution; Azoxystrobin; Bacteria; dinotefuran; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental impact; Fungicides; Herbicides; Insecticides; Japan; Natural environment; Nitrification; Nitrifying bacteria; nitrites; Oxidation; Pesticides; Pests; Plant protection; Pollution; Risk assessment; Salts; soil; Soil bacteria; Soil microorganisms; Soil Science & Conservation; Soils; Species diversity; Species richness; toxicology; Waste Water Technology; Water Management; Water Pollution Control; Dinotefuran; Azoxystrobin; Insecticide; Ammonium oxidizing bacteria; Ecotoxicological impact; Metylotenera
• ISSN: 0007-4861; 1432-0800; 1432-0800
• DOI: 10.1007/s00128-021-03163-1

Pesticides to protect crops from pests are subject to rigorous risk assessment before registration in Japan. However, further information needs to be collected regarding the assessment of impacts on the natural environment. In particular, nitrifying bacteria play a role in converting ammonium salts to nitrates in soil. However, there is limited research covering the effects of insecticides on nitrification, despite several fungicides and herbicides have an inhibitory effect on nitrifying bacteria. Therefore, we investigated the effect of pesticides on the nitrification when applied to soil. The application of both pesticides promoted ammonia oxidation, and suppressed nitrite oxidation in a high-concentration treatment of dinotefuran. In addition, it was clarified that the diversity and species richness of soil bacteria was significantly reduced when the pesticides were applied to the soil, and that the specific soil bacteria ( Metyhlotenera spp.) dominated the application of the pesticides.