Institute for Agro-Environmental Sciences, NARO

Organochemicals Unit

In Japan, some organochemicals including pesticides may be detected in crops where the amount exceeds the residue limits set by the Japanese Food Sanitation Law. Organochemicals unit has been developing the risk evaluation and the risk reduction techniques for avoiding pesticide residues in crops; in particular,
- Soil diagnostic method based on statistical analysis for persistent organic pollutants (POPs) residue in cucurbits,
- Risk management for pesticide residues in succeeding crops based on elucidation of aging process in soil and the uptake mechanism by crops,
- Bioremediation for hazardous organochemicals in soil originated from agro-chemicals, and
- New soil disinfestations techniques without pesticides.
Our unit aims at making these researches widely available to the agriculture as well as reflecting the new pesticides regulation system.

Effect of new soil disinfestations using diluted ethanol solution (left : control, right: Anaerobic Soil Disinfestation (ASD) with diluted ethanol solution) The damage of root-knot nematodes on cucumber root can be effectively reduced by new soil disinfestations.

Unit Leader

Nobuyasu SEIKE
Research Topic : Soil diagnosis

Unit Members

Research Topics
Kazuhiro TAKAGI Senior Principal Researcher Bioremediation
Sayuri NAMIKI Researcher Plant uptake of organochemicals

Research Publications

  • Y. Motoki, T. Iwafune, N. Seike*, K. Inao and T. Otani (2016) Effect of Time-Dependent Sorption on the Dissipation of Water-Extractable Pesticides in Soils. Journal of Agricultural Food Chemistry, 64, 4478-4486.
  • S. Namiki, T. Otani, N. Seike and S. Satoh (2015) Differential uptake and translocation of s-HCH and dieldrin by several plant species from hydroponic medium. Environmental Toxcology and Chemistry, 34, 536-544
  • Y. Koyama, C. Mihara, Y. Kobara, N. Momma and K. Toyota (2015) A real-time PCR based assat as a alternative to a seedling assay toevaluate potential risks of Meloidogyne incobnita. Nematological Research, 45: 85-91.
  • N. Seike, M. Sakai, H. Murano, M. Okamoto, T. Saito, I. Narita, Y. Hashimoto, Y. Ikeda, M. Endo and T. Otani (2012) Relationship between dieldrin uptake in cucumber fruits and methanol-water extractable residue in soil. Journal of Pesticide Science, 37, 252-257.
  • K. Takagi, A. Iwasaki, I. KameiI, K. Satsuma, Y. Yoshioka and N. Harada (2009) Aerobic Mineralization of Hexachlorobenzene by Newly Isolated Pentachloronitrobenzene-Degrading Nocardioides sp. Strain PD653. Applied and Environmental Microbiology, 75, 4452-4458.