Degradation and Adsorption of a Seed Fungicide Pefurazoate in Paddy Soil

Mitsuaki TAKENAKA, Shoji SAKAI, Hitoshi NISHIDA, Shuichiro KIMURA, Hiroshi HASE
1991 Journal of pesticide science  
Fate of the fungicide, pefurazoate Healthied) in flooded mineral and volcanic ash soils was investigated with 14C-labeled pefurazoate. 14C-Pefurazoate, when applied at 1 ppm, was quite easily degraded with a half-life of less than one week in both soils. Pent-4-enyl N-furfuryl-DL-homoalaninate, N-furfuryl-DL-homoalaninate, 1-[(RS)-1-carboxylato-propyl]-3-hydroxypyridinium, and N-(furan-2-ylcarbonyl)glycine were identified as major degradation products, amounting to less than 10% of the applied
more » ... 10% of the applied radioactivity. The radioactivity in the soil decreased due to the evolution of 14C02, which was an ultimate metabolite of pefurazoate. The Freundlich adsorption coefficient of pefurazoate was 16. 3 in the mineral soil and 21. 9 in the volcanic ash soil, suggesting pefurazoate was not adsorbed tightly by the soils.
doi:10.1584/jpestics.16.631 fatcat:kbg2edbbunbefaow34sw5pkbui