Appendix 2-5: Rejected ecotox bibliography for Chlorpyrifos

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This review considers several lipid systems in brain modulated by highly OP-sensitive lipases. Neuropathy target esterase (NTE) hydrolyzes lysophosphatidylcholine (lysoPC) as a preferred substrate. Gene deletion of NTE in mice is embryo lethal and the heterozygotes are hyperactive. NTE is very sensitive in vitro and in vivo to direct-acting OP delayed neurotoxicants and the related NTE-related esterase (NTE-R) is also inhibited in vivo. KIAA1363 hydrolyzes acetyl monoalkylglycerol ether (AcMAGE) of the platelet-activating factor (PAF) de novo biosynthetic pathway and is a marker of cancer cell invasiveness. It is also a detoxifying enzyme that hydrolyzes chlorpyrifos oxon (CPO) and some other potent insecticide metabolites. Monoacylglycerol lipase and fatty acid amide hydrolase regulate endocannabinoid levels with roles in motility, pain and memory. Inhibition of these enzymes in mice by OPs, such as isopropyl dodecylfluorophosphonate (IDFP), leads to dramatic elevation of brain endocannabinoids and distinct cannabinoid-dependent behavior. Hormone-sensitive lipase that hydrolyzes cholesteryl esters and diacylglycerols is a newly recognized in vivo CPO- and IDFP-target in brain. The OP chemotype can therefore be used in proteomic and metabolomic studies to further elucidate the biological function and toxicological significance of lipases in lipid metabolism. Only the first steps have been taken to achieve appropriate selective action for OP therapeutic agents.
Keywords: Animals
Keywords: Organophosphates
Keywords: Humans
Keywords: Brain -- drug effects
Keywords: EC
Keywords: Brain -- metabolism
Keywords: Lysophospholipids
Keywords: Lipase
Keywords: Organophosphates -- pharmacology
Keywords: 0
Keywords: Cannabinoid Receptor Modulators -- metabolism
Keywords: Cannabinoid Receptor Modulators
Keywords: Endocannabinoids
Keywords: Phospholipid Ethers
Keywords: Lysophospholipids -- metabolism
Keywords: Phospholipid Ethers -- metabolism
Keywords: Lipase -- metabolism
Date completed - 2008-12-10
Date created - 2008-09-08
Date revised - 2012-12-20
Language of summary - English
Pages - 355-364
ProQuest ID - 69520235
SuppNotes - Cites: Toxicol Appl Pharmacol. 2007 Oct 1;224(1):98-104[17663017]; Cites: Chem Biol. 2007 Jul;14(7):741-56[17656311]; Cites: Toxicol Appl Pharmacol. 2008 Apr 1;228(1):42-8[18164358]; Cites: Biochem Pharmacol. 1995 Jun 29;50(1):83-90[7605349]; Cites: Annu Rev Physiol. 1995;57:135-50[7778861]; Cites: Nature. 1996 Nov 7;384(6604):83-7[8900284]; Cites: J Biol Chem. 1996 Dec 6;271(49):31426-30[8940153]; Cites: Biochem Pharmacol. 1997 Feb 7;53(3):255-60[9065728]; Cites: J Biol Chem. 1997 Mar 28;272(13):8567-75[9079687]; Cites: J Biol Chem. 1997 Oct 24;272(43):27218-23[9341166]; Cites: Proc Natl Acad Sci U S A. 2000 Jan 18;97(2):787-92[10639158]; Cites: DNA Res. 2000 Feb 28;7(1):65-73[10718198]; Cites: Biochemistry. 2001 Apr 3;40(13):4005-15[11300781]; Cites: Proc Natl Acad Sci U S A. 2001 Jul 31;98(16):9371-6[11470906]; Cites: J Biol Chem. 2002 Feb 15;277(7):4806-15[11717312]; Cites: Proc Natl Acad Sci U S A. 2002 Aug 6;99(16):10819-24[12136125]; Cites: Proc Natl Acad Sci U S A. 2002 Aug 6;99(16):10335-40[12149457]; Cites: Science. 2002 Nov 29;298(5599):1793-6[12459591]; Cites: Nat Genet. 2003 Apr;33(4):477-85[12640454]; Cites: Biochemistry. 2003 Jun 10;42(22):6696-708[12779324]; Cites: Proc Natl Acad Sci U S A. 2003 Jun 24;100(13):7983-7[12805562]; Cites: Arch Biochem Biophys. 2003 Aug 15;416(2):137-46[12893290]; Cites: Science. 1992 Dec 18;258(5090):1946-9[1470919]; Cites: Blood. 2004 May 1;103(9):3562-4[14726390]; Cites: Mol Cell Biol. 2004 Feb;24(4):1667-79[14749382]; Cites: Proc Natl Acad Sci U S A. 2004 Apr 6;101(14):5075-80[15051870]; Cites: Toxicol Appl Pharmacol. 2004 May 1;196(3):319-26[15094302]; Cites: Nat Rev Drug Discov. 2004 Aug;3(8):695-710[15286736]; Cites: J Biol Chem. 2004 Nov 19;279(47):48968-75[15364929]; Cites: Proc Natl Acad Sci U S A. 2005 Apr 26;102(17):6195-200[15840715]; Cites: J Biol Chem. 2005 Jul 22;280(29):26669-79[15908428]; Cites: Annu Rev Biochem. 2005;74:411-32[15952893]; Cites: Chem Biol. 2005 Jun;12(6):649-56[15975510]; Cites: J Clin Pathol. 2005 Aug;58(8):826-32[16049284]; Cites: Biochim Biophys Acta. 2005 Sep 15;1736(2):87-93[16137924]; Cites: Toxicol Lett. 2006 Mar 15;162(1):94-7[16309859]; Cites: Toxicol Appl Pharmacol. 2006 Feb 15;211(1):78-83[16310817]; Cites: Curr Opin Pharmacol. 2006 Apr;6(2):154-61[16495153]; Cites: Nat Genet. 2006 Jul;38(7):752-4[16783378]; Cites: J Lipid Res. 2006 Sep;47(9):1940-9[16799181]; Cites: Chem Rev. 2006 Aug;106(8):3279-301[16895328]; Cites: Int J Biochem Cell Biol. 2007;39(1):124-32[16978909]; Cites: Proc Natl Acad Sci U S A. 2006 Oct 10;103(41):15260-5[17015841]; Cites: Chem Biol. 2006 Oct;13(10):1041-50[17052608]; Cites: Mol Cell Biochem. 2007 Aug;302(1-2):179-85[17385009]; Cites: J Am Chem Soc. 2007 Aug 8;129(31):9594-5[17629278]; Cites: Basic Clin Pharmacol Toxicol. 2007 Nov;101(5):287-93[17910610]
Last updated - 2013-01-19
British nursing index edition - Chemico-biological interactions, September 25, 2008, 175(1-3):355-364
Corporate institution author - Casida, John E; Nomura, Daniel K; Vose, Sarah C; Fujioka, Kazutoshi
DOI - MEDL-18495101; 18495101; NIHMS72510; PMC2582404; 0009-2797 eng

188. Castillo, L. E.; De la Cruz, E., and Ruepert, C. Ecotoxicology and Pesticides in Tropical Aquatic Ecosystems of Central America. 10309//: 1997; 16, (1): 41-51.

Rec #: 550
Notes: Chemical of Concern: CPY

189. Castillo, M. D. P.; Torstensson, L., and Stenstrom, J. Biobeds for environmental protection from pesticide use - A review. 2008; 56, (15 ): 6206-6219.

Rec #: 57489
Notes: Chemical of Concern: CPY
Abstract: Abstract: Biobeds originated in Sweden in response to the need for simple and effective methods to minimize environmental contamination from pesticide use, especially when filling spraying equipment, a typical point source of contamination. The biobed system has attracted attention in several countries, where work is being conducted to adapt it to local conditions and applications. As a consequence, the biobed system has been more or less modified and sometimes renamed, for example, as biomassbed in Italy, biofilter in Belgium, and Phytobac and biobac in France. The effectiveness and simplicity of the biobed also make it suitable for use in developing countries, and different adaptations of the biobed concept now exist in, for instance, Peru, Guatemala, and Ecuador. When the modification of the biobed includes an intention to use it for retention and degradation of pesticides in sprayer washings, the construction has to be adapted to, for example, lined biobeds to ensure that no pesticide leaching will occur. Replacement of some of the original materials in the Swedish biomixture (straw, peat, and soil) can also change the performance of the system, for instance, the amount, activity, and composition of the microbial community that develops. This review presents the state of the art of biobeds and similar systems in Sweden and worldwide and identifies future research needs. Factors affecting the efficiency of biobeds in terms of degradation and retention of pesticides are discussed, with particular emphasis on the microbial processes involved.
ISI Document Delivery No.: 335DF

190. Catalgol, B. K.; Ozden, S., and Alpertunga, B. Effects of trichlorfon on malondialdehyde and antioxidant system in human erythrocytes. 2007; 21, (8): 1538-1544.

Rec #: 57499
Notes: Chemical of Concern: CPY
Abstract: Abstract: Organophosphorus insecticides may induce oxidative stress leading to generation of free radicals and alteration in antioxidant system. The aim of this study was to examine the potency of trichlorfon, an organophosphate insecticide, to induce oxidative stress response in human erythrocytes in vitro. For this purpose trichlorfon solutions in different concentrations and erythrocyte solutions were incubated at 37 degrees C for 60 min. At the end of the incubation time, malondialdehyde (NIDA), an end product of lipid peroxidation, total glutathione, reduced glutathione (GSH) levels, activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) enzymes were determined by spectrophotometric methods. Trichlorfon increased MDA formation depended on the concentration. On the other hand, decreases in the GSH-Px activity, GSH levels and increases in the total glutathione levels, SOD and CAT activities were seen in the studied concentrations. The present findings indicate that the in vitro toxicity of trichlorfon may be associated with oxidative stress. (C) 2007 Elsevier Ltd. All rights reserved.
Keywords: erythrocytes, trichlorfon, oxidative stress, malondialdehyde,
ISI Document Delivery No.: 239ZZ

191. Catano, H. C.; Carranza, E.; Huamani, C., and Hernandez, A. F. Plasma cholinesterase levels and health symptoms in peruvian farm workers exposed to organophosphate pesticides. 2008; 55, (1): 153-159.

Rec #: 57509
Notes: Chemical of Concern: CPY
Abstract: Abstract: The purpose of this study was to examine plasma cholinesterase (PChE) changes and the adverse health effects associated with chronic low-dose exposure to organophosphates (OPs) in a Peruvian agricultural population. A cross-sectional study with a clinical interview and blood tests was performed among 213 farm workers from two subtropical valleys in Peru. The control group consisted of 78 nonexposed workers from the same areas. PChE levels from the two exposed subgroups (pesticide applicators and other agricultural jobs) were significantly lower than those of controls (1554 +/- 315 U/l, 1532 +/- 340 U/l, and 1787 +/- 275 U/l, respectively). Fifteen percent of the exposed population reported a past poisoning by pesticides, all of them needing medical evaluation and treatment. They had significantly lower PChE levels as compared to those without this antecedent. Approximately 61% of the exposed workers reported pesticide-related symptoms, but no significant difference was found in their PChE as compared to workers without symptoms. On the other hand, the use of personal protective equipment (PPE) was significantly associated with higher PChE levels and with a lower risk of reporting pesticide-related symptoms, which supports the benefit from using appropriate protective measures. In conclusion, data indicate that farm workers exposed to OPs in developing countries need to be monitored by means of PChE and an examination of their clinical status, which would allow identification of farm workers most at risk from pesticide toxicity. The use of correct PPE is highly recommended.
ISI Document Delivery No.: 301CT

192. Cavalcante, Rivelino M; Lima, Danielle M; Fernandes, Gabrielle M; Duavi, Wersangela C, and Cavalcante, Rivelino M. Relation Factor: a New Strategy for Quality Control in the Determination of Pesticides in Environmental Aqueous Matrices. 2012 May 15; 93, 212-218.

Rec #: 46729
Keywords: FATE
Notes: Chemical of Concern: CPY
Abstract: Abstract: The effects promoted by environmental aqueous matrices on pesticide determinations have been assessed, and for the first time, a simple, low-cost and efficient strategy for the correction of analytical results has been determined. This method can be useful as a parameter of quality control in a quality assurance programs. Evaluation of the matrix effect showed that environmental aqueous matrices, e.g., estuarine water, promote a distinctive and significant effect on the determination of pesticides. The picloram, atrazine and methyl parathion pesticides suffered the smallest effects promoted by the estuarine matrix, whereas chlorpyrifos and cypermethrin suffer a significant effect. For picloram, the matrix effect was a function of its physiochemical properties. However, for atrazine, methyl parathion, chlorpyrifos and cypermethrin, the matrix effect was promoted by environmental matrix components. As strategy for analytical quality control, it has been determined that there are relation factors (RFs) between pesticides and the selected surrogates standards. These RFs are not altered by the complexities and compositions of simple and complex aqueous matrices. Predetermined RFs was applied to the picloram, atrazine and methyl parathion assessment in a real sample from the estuary of the Jaguaribe River, and the results showed that when no quality control was applied, the concentration levels would be underestimated, leading to incorrect results and inaccurate conclusions.
Keywords: Ceramic Abstracts/World Ceramics Abstracts (WC); Environmental Engineering Abstracts (EN); Engineered Materials Abstracts, Ceramics (EC)
Date revised - 2012-07-01
Language of summary - English
Pages - 212-218
ProQuest ID - 1022900960
Last updated - 2012-12-05
British nursing index edition - Talanta [Talanta]. Vol. 93, pp. 212-218. 15 May 2012.
Corporate institution author - Cavalcante, Rivelino M; Lima, Danielle M; Fernandes, Gabrielle M; Duavi, Wersangela C
DOI - 4052947f-c5d7-47c2-8d29csamfg201; 16604770; 0039-9140 English

193. Cedergreen, N.; Sorensen, H., and Svendsen, C. Can the joint effect of ternary mixtures be predicted from binary mixture toxicity results? 2012; 427, 229-237.

Rec #: 57519
Keywords: MIXTURE
Notes: Chemical of Concern: CPY
Abstract: Abstract: The joint effect of the majority of chemical mixtures can be predicted using the reference model of Concentration Addition (CA). It becomes a challenge, however, when the mixtures include chemicals that synergise or antagonise the effect of each other. In this study we examine if the deviation from CA of seven ternary mixtures of interacting chemicals can be predicted from knowledge of the binary mixture responses involved. We hypothesise that the strongest interactions will take place in the binary mixtures and that the size of the ternary mixture response can be predicted from knowledge of the binary interactions. The hypotheses were tested using a stepwise modelling approach of incorporating the information held in binary mixtures into a ternary mixture model, and comparing the model predictions with observed ternary mixture toxicity data derived from studies of interacting chemical mixtures on the floating plant Lemna minor and the bacteria Vibrio fischeri. The results showed that for both the antagonistic and the synergistic ternary mixtures the ternary model predictions were superior to the conventional CA reference model and provided robust estimations of the size of the experimentally derived ternary mixture toxicity effects. (C) 2012 Elsevier B.V. All rights reserved.
Keywords: Mixtures toxicity, Modelling, Synergy, Antagony, Risk assessment
ISI Document Delivery No.: 956TF

194. Ch+ífer-Peric+ís, Consuelo; Balaguer, +üngel ; Maquieira, +üngel, and Puchades, Rosa. Dispersive solid-phase extraction and immunoassay with internal reference calibration using fatty acid-coated inorganic fluorescent nanoparticles. 2013 Jan 1-; 432, (1): 31-37.

Rec #: 4070
Keywords: IN VITRO
Notes: Chemical of Concern: CPY
Abstract: Dispersive solid-phase extraction (dSPE) using fatty acid-coated Eu2O3 nanoparticles (NPs) was developed, and a direct immunoassay was carried out employing these NPs as support. Secondary antibodies labeled with fluorophore groups were used as reporters, and the intrinsic optical properties of the Eu2O3 NPs were employed as an internal calibration of the detection system. The methodology was optimized for both dSPEÇöNP amount, sample volume, extraction time, ionic strength, and pHÇöand immunoassayÇôimmunoreagent concentrations, ionic strength, and incubation time. As proof of concept, the methodology was applied to the bovine serum albumin (BSA)/anti-BSA system, and precision of the method was between 5% and 17% with an IC50 of 100 nM. Then, water samples with high saline content (sea water) were assayed to observe the matrix effect, and average recoveries (n = 3) between 78% and 108% were obtained, demonstrating the reliability of the developed analytical method. Finally, the simultaneous dSPEÇôimmunoassay methodology was applied to other compounds with very different chemical characteristics such as an oligonucleotide, the antibiotic sulfamerazine, and the pesticide chlorpyriphos. Although the IC50 values for sulfamerazine were approximately 2400 nM, satisfactory standard curves were obtained. However, poor reproducibility and sensitivity results were obtained for the oligonucleotide and chlorpyriphos preliminary assays. Nanoparticle/ Immunoassay/ Dispersive SPE/ Fluorescence/ Internal reference/ BSA

195. Chai, L K; Mohd-Tahir, N; Hansen, S; Hansen, Hcb, and Chai, L K. Dissipation and Leaching of Acephate, Chlorpyrifos, and Their Main Metabolites in Field Soils of Malaysia. 2009; 38, (3): 1160-1169.

Rec #: 41639
Keywords: FATE
Notes: Chemical of Concern: CPY
Abstract: Abstract: Preventive treatment with insecticides at high dosing rates before planting of a new crop- soil drenching- is a common practice in some tropical intensive cropping systems, which may increase the risk of leaching, soil functioning, and pesticide uptake in the next crop. The degradation rates and migration of acephate and chlorpyrifos and their primary metabolites, methamidophos and 3,5,6-trichloropyridinol (TCP), have been studied in clayey red yellow podzolic (Typic Paleudults), alluvial (Typic Udorthents), and red yellow podzolic soils (Typic Kandiudults) of Malaysia under field conditions. The initial concentrations of acephate and chlorpyrifos in topsoils were found to strongly depend on solar radiation. Both pesticides and their metabolites were detected in subsoils at the deepest sampling depth monitored (50 cm) and with maximum concentrations up to 2.3 mg kg super(-1) at soil depths of 10 to 20 cm. Extraordinary high dissipation rates for weakly sorbed acephate was in part attributed to preferential flow which was activated due to the high moisture content of the soils, high precipitation and the presence of conducting macropores running from below the A horizons to at least 1 m, as seen from a dye tracer experiment. Transport of chlorpyrifos and TCP which both sorb strongly to soil organic matter was attributed to macropore transport with soil particles. The half-lives for acephate in topsoils were 0.4 to 2.6 d while substantially longer half-lives of between 12.6 and 19.8 d were observed for chlorpyrifos. The transport through preferential flow of strongly sorbed pesticides is of concern in the tropics.
Keywords: Degradation
Keywords: P 5000:LAND POLLUTION
Keywords: SW 3030:Effects of pollution
Keywords: Metabolites
Keywords: intensive farming
Keywords: Particulates
Keywords: Solar radiation
Keywords: Crops
Keywords: Soil
Keywords: Tracers
Keywords: Insecticides
Keywords: Agricultural Chemicals
Keywords: Malaysia
Keywords: R2 23050:Environment
Keywords: migration
Keywords: Leaching
Keywords: Soil Contamination
Keywords: Organic matter
Keywords: planting
Keywords: Soil Organic Matter
Keywords: ENA 06:Food & Drugs
Keywords: Chlorpyrifos
Keywords: AQ 00007:Industrial Effluents
Keywords: Tropical environments
Keywords: Pesticides
Keywords: subsoils
Keywords: Macropores
Keywords: Preferential Flow
Keywords: Topsoil
Keywords: Risk Abstracts; Pollution Abstracts; Environment Abstracts; Water Resources Abstracts; Aqualine Abstracts
Date revised - 2009-07-01
Language of summary - English
Location - Malaysia
Pages - 1160-1169
ProQuest ID - 20757790
SubjectsTermNotLitGenreText - migration; Leaching; Degradation; Organic matter; planting; Metabolites; intensive farming; Particulates; Solar radiation; Crops; Soil; Chlorpyrifos; Tracers; Insecticides; Pesticides; Tropical environments; subsoils; Agricultural Chemicals; Soil Contamination; Macropores; Preferential Flow; Soil Organic Matter; Topsoil; Malaysia
Last updated - 2012-03-29
British nursing index edition - Journal of Environmental Quality [J. Environ. Qual.]. Vol. 38, no. 3, pp. 1160-1169. 2009.
Corporate institution author - Chai, L K; Mohd-Tahir, N; Hansen, S; Hansen, HCB
DOI - MD-0010064958; 10188677; 0047-2425; 1537-2537 English

196. Chai, L. K. ; Wong, M. H.; Mohd-Tahir, N., and Hansen, H. C. B. Degradation and mineralization kinetics of acephate in humid tropic soils of Malaysia. 2010; 79, (4): 434-440.

Rec #: 57599
Keywords: FATE
Notes: Chemical of Concern: CPY
Abstract: Abstract: Acephate is poorly sorbed to soil, thus the risk of leaching to the aquatic environment is high if it is not quickly degraded. The effect of soil moisture, temperature, microbial activity and application rate on acephate degradation has been studied in three Malaysian soils to examine and identify critical variables determining its degradation and mineralization kinetics. First-order kinetics could be used to describe degradation in all cases (r(2) > 0.91). Acephate degraded faster in air-dry (t(1/2), 9-11 d) and field capacity (t(1/2) 10-16 d) soils than in the wet soils (t(1/2) 32-77 d). The activation energy of degradation was in the range 17-28 kJ mol(-1) and significantly higher for the soil with higher pH and lower clay and iron oxide contents. Soil sterilization caused a 3- to 10-fold decrease in degradation rates compared to non-sterile soils (t(1/2) 53-116 d) demonstrating that acephate degradation is mainly governed by microbial processes. At 5-fold increase in application rates (25 mu g g(-1)), half-life increased slightly (t(1/2) 13-19 d) or was unaffected. Half-life from acephate mineralization was similar to those from degradation but much longer at the 5-fold increase in acephate application rates (t(1/2) 41-96 d) demonstrating that degradation of metabolites is rate limiting. Thus, application of acephate should be restricted or avoided during wet seasons with heavy rainfall and flooded soil as in paddy cultivation. Sandy soils with low microbial activity are more prone to acephate leaching than clayey soils rich in humic matter. (C) 2010 Elsevier Ltd. All rights reserved.
Keywords: Half-lives, Pesticide, Carbon 14, Soil microbes, First order kinetic
ISI Document Delivery No.: 588YM

197. Chai, Lian-Kuet; Mohd-Tahir, Norhayati; Hansen, Hans Christian Bruun, and Chai, Lian-Kuet. Determination of Chlorpyrifos and Acephate in Tropical Soils and Application in Dissipation Studies. 2008 Jul; 88, (8): 549-560.

Rec #: 42089
Keywords: FATE
Notes: Chemical of Concern: CPY
Abstract: Abstract: A rapid and accurate method for the extraction and determination of the two organophosphorus insecticides, chlorpyrifos and acephate in top- and subsoil materials of three tropical clayey soils from Sarawak has been developed. Soil samples were extracted with ethyl acetate and the pesticides were determined by GC-FPD. High recoveries of 76-102% and 76-100% were obtained for acephate and chlorpyrifos respectively, at fortification levels of 0.0,0.1 and 1 mg kg-1 with standard deviations below 9.0%. The addition of water prior to the extraction was important for obtaining high and reproducible recoveries. The method did not require clean-up of the extracts prior to GC analysis and could be detected down to 0.01 mg kg-1. A field study was conducted using the modified method to measure the degradation kinetics and migration of acephate and chlorpyrifos in one of the soils over a period of 84 days. The degradation of acephate and chlorpyrifos were rapid with half-lives of 3.3 and 8.7 days, respectively. Both pesticides were detected in subsoils 2 h after application at the deepest (50 cm) soil layers examined and at concentrations up to 5.42 mg kg-1. Subsoil concentrations of acephate were higher than for chlorpyrifos, and subsoil concentrations of acephate peaked after it had started to degrade in the top soil. The subsoil concentrations of the pesticides were attributed to transport with soil particles (chlorpyrifos) and via solution (acephate) through pores and cracks present in the soil profiles. The study demonstrates the high mobility of even strongly retained and fast degrading pesticides under tropical humid conditions.
Keywords: migration
Keywords: Organophosphorus compounds
Keywords: Degradation
Keywords: Mobility
Keywords: ENA 09:Land Use & Planning
Keywords: P 5000:LAND POLLUTION
Keywords: Particulates
Keywords: Chlorpyrifos
Keywords: Soil
Keywords: Kinetics
Keywords: Pesticides
Keywords: Tropical environments
Keywords: Pollution Abstracts; Environment Abstracts
Keywords: Borneo, Sarawak
Keywords: subsoils
Date revised - 2009-08-01
Language of summary - English
Location - Borneo, Sarawak
Pages - 549-560
ProQuest ID - 20769935
SubjectsTermNotLitGenreText - Soil; Chlorpyrifos; migration; Organophosphorus compounds; Mobility; Degradation; Kinetics; Tropical environments; Pesticides; subsoils; Particulates; Borneo, Sarawak
Last updated - 2011-12-14
British nursing index edition - International Journal of Environmental and Analytical Chemistry [Int. J. Environ. Anal. Chem.]. Vol. 88, no. 8, pp. 549-560. Jul 2008.
Corporate institution author - Chai, Lian-Kuet; Mohd-Tahir, Norhayati
DOI - MD-0010233434; 10310854; 0306-7319 English

198. Chandler, K. J. and Tucker, G. R. suSCon (R) Maxi and control of Childers, negatoria and southern one-year canegrubs in sugarcane. 2012; 114, (1363): 504-511.

Rec #: 57649
Notes: Chemical of Concern: CPY
Abstract: Abstract: This paper summarises efficacy data collected to satisfy requirements to register the granular controlled-release (CR) insecticide suSCon(1)(R) Maxi (50 g imidacloprid/kg) to control damage by Childers canegrub (Antritrogus parvulus), negatoria canegrub (Lepidiota negatoria) and southern one-year canegrub (Antitrogus consanguineus) to the root-mass of sugarcane crops in southern Queensland. The paper further illustrates collaborative research and development (R&D) to provide products suited to the sugarcane industry's needs, following a similar process to register suSCon Maxi for control of greyback canegrub. Populations of all three species were markedly reduced in first and second ratoon crops by treatment with 10 kg/ha of product applied into the planting furrow either at-planting or at drill fill-in. Cane yield increased in first and second ratoon crops, following these population reductions. These data support submissions to register suSCon Maxi for control of all three species up to second ratoon. Additional data is probably sufficient to support registration to control Childers canegrub for up to four crop-years (3rd ratoon). suSCon Maxi was equally as effective as other registered CR products against negatoria and southern one-year canegrubs, and more effective against Childers canegrub.
Keywords: canegrub, control, controlled-release, imidacloprid, insecticide,
ISI Document Delivery No.: 978VT

199. Chang, C. S.; Yen, J. H.; Chen, W. C., and Wang, Y. S. Soil dissipation of juvenile hormone analog insecticide pyriproxyfen and its effect on the bacterial community. 2012; 47, (1): 13-21.

Rec #: 57679
Keywords: BACTERIA
Notes: Chemical of Concern: CPY
Abstract: Abstract: This investigation was undertaken to examine the dissipation rate of pyriproxyfen as well as the change in the soil bacterial community. Residues of pyriproxyfen were measured using high performance liquid chromatography (HPLC) and the changes in bacterial community were determined by comparing the 16S rDNA bands on patterns by denaturing gradient gel electrophoresis (DGGE). The dissipation of pyriproxyfen was affected by both the concentration applied and incubation temperature. Lower concentrations (1 mg Kg(-1)) and higher incubation temperatures (30 and 40 degrees C) showed more rapid dissipation rates. The population of microbial community decreased rapidly after incubation with 10 mg Kg(-1) of pyriproxyfen for 91 days, indicating the toxicity of pyriproxyfen toward bacterial communities in a closed soil ecosystem.
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