To elucidate the uptake translocation patterns of the insecticide dinotefuran treated in radish foliar and cultivated soil, the residue amounts of dinotefuran and its metabolites(DN, UF and MNG) were investigated. When cultivate radish during 70 days after soil treatment of dinotefuran WP(10%) with 2 and 10 mg/kg for root uptake, residue amounts of it was decreased 96.9-98.7% with 0.052 and 0.293 mg/kg at harvest day in low and high treated soil, respectively. At harvest day, dinotefuran was taken up via root from soil about 10.8% in a radish plant cultivated in 2 mg/kg treated soil and remained in root with 0.007 mg/kg and leaf with 0.030 mg/kg. For radish plant cultivated 10 mg/kg treated soil, dinotefuran was taken up about 9.5% and remain 0.068 and 0.058 mg/kg in radish root and leaf, respectively. And leaf uptake was carried out spray on radish leaf grown for 40 days which was covered with plastic vinyl and absorbable paper to prevent contact with the treatment solution, and sprayed with dilution of 1,000, 500 and 200 times according to safe use guideline. The initial residue amounts of dinotefuran in radish leaf were 0.397, 0.788 and 1.172 mg/kg in each treated concentration, and 9.0-23.1% of them were moved to downward with 0.07, 0.042 and 0.083 mg/kg residue in radish root, respectively. Consequently, dinotefuran was taken up effectively by radish leaf and root and most of them were distributed in leaf than root. Absorbed dinotefuran was degraded into DN, UF and MNG in radish.

Uptake translocation of insecticide dinotefuran from soil into radish

254th National Meeting (2017)

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