Pesticide residues in water and an aquatic plant, Nelumbo nucifera, in a river mouth at Lake Kasumigaura, Japan

agua diazinon eau fongicide fungicidas fungicides herbicidas herbicide herbicides insecticidas insecticide insecticides japan japon lac lagos lakes land malezas mauvaise herbe nelumbo nucifera pesticide pesticides plaguicidas residues residuos simetrina simetryn terre tierras water weeds