Journal of Pesticide Science
Online ISSN : 1349-0923
Print ISSN : 1348-589X
ISSN-L : 0385-1559
Search
Advanced search
OR
Browse
Search
Volume 37, Issue 4
Displaying 1-20 of 20 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
PART I (IN ENGLISH)
Original Articles
  • Application of matrix-assisted laser-desorption/ionization time-of-flight mass spectrometry for the identification of alkylphenol polyethoxylate-degrading bacteria in the environment
    Yudai Hotta, Manabu Wakayama, Kaduki Niwa, Akifumi Hosoda, Hiroto Tamu ...
    Article type: Original Article
    2012 Volume 37 Issue 4 Pages 305-311
    Published: November 20, 2012
    Released on J-STAGE: November 20, 2012
    Advance online publication: November 14, 2012
    DOIhttps://doi.org/10.1584/jpestics.D12-023
    JOURNAL FREE ACCESS
    Supplementary material
    Show abstractHide abstract
    In order to clarify the usefulness of the S10-GERMS (S10-spc-alpha operon gene-encoded ribosomal protein mass spectrum) method for the discrimination of microbial isolates from the environment, the isolates with octylphenol polyethoxylate (OPEOn)-degrading capability from several soils in Japan were classified into 4 biodegradation patterns based on different final metabolic toxicants. Some isolates were identified as genera Chelatococcus and Mesorhizobium which have never been reported as OPEOn-degrading bacteria based on 16S rRNA gene sequences. The findings from this study demonstrate that the S10-GERMS method successfully discriminates the isolates at the strain level in the genus Pseudomonas. Moreover, this method is better than 16S rRNA gene sequence similarity because it precisely demonstrated that OPEOn-degrading bacteria in the genera Chelatococcus and Mesorhizobium might be new species. The S10-GERMS method is suggested as a useful tool for the discrimination and monitoring of man-made chemical-degrading bacteria isolated from the environment.
    View full abstract
    Download PDF (396K)
  • Probabilistic assessment of herbicide runoff from Japanese rice paddies: The effects of local meteorological conditions and site-specific water management
    Kei Kondo, Julien Boulange, Thai Khanh Phong, Kazuaki Hiramatsu, Tsuyo ...
    Article type: Original Article
    2012 Volume 37 Issue 4 Pages 312-322
    Published: November 20, 2012
    Released on J-STAGE: November 20, 2012
    Advance online publication: November 14, 2012
    DOIhttps://doi.org/10.1584/jpestics.D11-058
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Uncertainty assessments of herbicide losses from rice paddies in Japan associated with local meteorological conditions and water management practices were performed using a pesticide fate and transport model, PCPF-1, under the Monte Carlo (MC) simulation scheme. First, MC simulations were conducted for five different cities with a prescribed water management scenario and a 10-year meteorological dataset of each city. The effectiveness of water management was observed regarding the reduction of pesticide runoff. However, a greater potential of pesticide runoff remained in Western Japan. Secondly, an extended analysis was attempted to evaluate the effects of local water management and meteorological conditions between the Chikugo River basin and the Sakura River basin using uncertainty inputs processed from observed water management data. The results showed that because of more severe rainfall events, significant pesticide runoff occurred in the Chikugo River basin even when appropriate irrigation practices were implemented.
    View full abstract
    Download PDF (576K)
  • Analysis of parameter uncertainty and sensitivity in PCPF-1 modeling for predicting concentrations of rice herbicides
    Julien Boulange, Kei Kondo, Thai Khanh Phong, Hirozumi Watanabe
    Article type: Original ArticleOriginal Article
    2012 Volume 37 Issue 4 Pages 323-332
    Published: November 20, 2012
    Released on J-STAGE: November 20, 2012
    Advance online publication: November 14, 2012
    DOIhttps://doi.org/10.1584/jpestics.D12-036
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    This paper demonstrates the procedures for probabilistic assessment of a pesticide fate and transport model, PCPF-1, to elucidate the modeling uncertainty using the Monte Carlo technique. Sensitivity analyses are performed to investigate the influence of herbicide characteristics and related soil properties on model outputs using four popular rice herbicides: mefenacet, pretilachlor, bensulfuron-methyl and imazosulfuron. Uncertainty quantification showed that the simulated concentrations in paddy water varied more than those of paddy soil. This tendency decreased as the simulation proceeded to a later period but remained important for herbicides having either high solubility or a high 1st-order dissolution rate. The sensitivity analysis indicated that PCPF-1 parameters requiring careful determination are primarily those involve with herbicide adsorption (the organic carbon content, the bulk density and the volumetric saturated water content), secondary parameters related with herbicide mass distribution between paddy water and soil (1st-order desorption and dissolution rates) and lastly, those involving herbicide degradations.
    View full abstract
    Download PDF (656K)
Notes
PART II (IN JAPANESE)
Abstracts of Articles in Part I
  • Abstracts of Articles in Part I
    Article type: Abstracts of Articles in Part I
    2012 Volume 37 Issue 4 Pages 347-348
    Published: November 20, 2012
    Released on J-STAGE: May 20, 2013
    DOIhttps://doi.org/10.1584/jpestics.W12-31
    JOURNAL FREE ACCESS
    Download PDF (185K)
  • Action mechanism of a herbicide, thiobencarb
    Yoshitaka Tanetani, Koichiro Kaku, Mitsumasa Ikeda, Tsutomu Shimizu
    2013 Volume 37 Issue 4 Pages D12-999
    Published: February 20, 2013
    Released on J-STAGE: January 24, 2024
    DOIhttps://doi.org/10.1584/jpestics.D12-999
    JOURNAL FREE ACCESS FULL-TEXT HTML
    Show abstractHide abstract
    The action mechanism of thiobencarb was studied by examining the inhibitory effects of this herbicide on the biosynthesis of very-long-chain fatty acids (VLCFAs). Thiobencarb treatment decreased VLCFAs, such as C20:0, C20:1, C22:0, C24:0, C24:1 and C26:0 fatty acids, and increased long-chain-fatty acids and medium-chain-fatty acids, such as C14:0, C15:0, C18:0 and C18:1 fatty acids, which are precursors of VLCFAs, in barnyard millet cultured cells. Thiobencarb sulfoxide and sulfone potently inhibited VLCFA elongase (VLCFAE) activity in the microsomal fraction of etiolated barnyard millet seedlings, although thiobencarb itself slightly inhibited it. These results suggested that thiobencarb is a VLCFAE-inhibiting herbicide whose active forms are its oxidized metabolites, such as sulfoxide and sulfone. Thiobencarb sulfoxide inhibited the VLCFAE activity of the microsomal fraction of etiolated barnyard millet seedlings in a time-independent manner. This time-independent inhibition proposed a reversible inhibition mechanism of the VLCFAE by thiobencarb sulfoxide, likely with isoxazoline-type herbicides, such as pyroxasulfone, which have been classified into group K3 of the Herbicide Resistance Action Committee (HRAC) in the U.S. It is assumed that the time-independent reversible inhibition of VLCFAE is applicable to other thiocarbamate herbicides presently classified into group N of the HRAC.
    View full abstract
    Download PDF (326K) Full view HTML
Review (with Abstract in English)
  • GABA A receptor antagonistic insecticide fipronil: Overview of toxicological studies
    Atsushi Suzuki, Ayumi Aoki, Masami Fujiwara, Osamu Koto, Masako Akiyam ...
    Article type: Review
    2012 Volume 37 Issue 4 Pages 349-361
    Published: November 20, 2012
    Released on J-STAGE: November 22, 2012
    Advance online publication: November 01, 2012
    DOIhttps://doi.org/10.1584/jpestics.W12-24
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Fipronil is a phenylpyrazole-class insecticide used for rice protection, and its pharmacological activity is an interruption of the GABA A receptor. Since fipronil suppresses GABAergic neurons, central nervous system (CNS) toxicity is well observed. However, fipronil has no influence on neurogenesis. Fipronil promoted hepatocyte vacuolization and thyroid oncogenesis only in rats. It had no genotoxic activity, and thyroid oncogenesis was promoted by accelerated thyroxin clearance under the genetic lack of thyroxine-binding globulin (TBG), suggesting an apparent rat-specific mechanism. Therefore, in relation to human health concerns, the most important toxicity of fipronil would be CNS toxicity, which was commonly observed in most of the toxicological studies with various species. Most of the NOAELs were established by CNS toxicity, and a minimum value was contributed for the ADI setting. Thus, the safety and human risk assessments are well ensured by the ADI.
    View full abstract
    Download PDF (516K)
Seminar: Experimental Techniques
Minireviews: Vision for next-generation pesticides
Minireviews: Let′s think about more pesticide resistance magnagement
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top