Runoff and degradation of aerially applied dinotefuran in paddy fields and river.
Variation, run-off and degradation characteristics of the insecticide dinotefuran, (EZ)-(RS)-1-methyl-2-nitro-3-(tetrahydro-3-furyl-methyl)guanidine, in water and soil from two paddy fields after aerial application was investigated as well as in river water. Maximum concentrations of dinotefuran were 290 and 720 µg/L in the two paddy waters, 25 and 28 µg/kg dry in the two paddy soils, and 10 µg/L in the river water. Runoff ratios of dinotefuran from the paddy fields were calculated as 14%-41%. Mean half-lives of dinotefuran were 5.4 days in the paddy water and 12 days in the paddy soil. Results obtained in this study are important for the evaluation of the actual behavior of dinotefuran in paddy fields and rivers.
Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, 265-1 Higashijima, Akiha-ku, Niigata, Niigata, 956-8603, Japan.
Sayako
S
Yokoyama
Masataka
M
Ito
Shunsuke
S
Nagasawa
Masayuki
M
Morohashi
Masaki
M
Ohno
Yukitaka
Y
Todate
Tomohiro
T
Kose
Kuniaki
K
Kawata
D000383:Agriculture; D000388:Air; D001673:Biodegradation, Environmental; D005618:Fresh Water; D006146:Guanidines / Q000378:metabolism*; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000378:metabolism*; D045483:Rivers / Q000737:chemistry*; D012987:Soil; D014867:Water; D014872:Water Movements; D014874:Water Pollutants, Chemical / Q000032:analysis*
D006146:Guanidines; D000073943:Neonicotinoids; D009574:Nitro Compounds; D012987:Soil; D014874:Water Pollutants, Chemical; D014867:Water; C465368:dinotefuran