• Title/Summary/Keyword: monocrotophos

Search Result 26, Processing Time 0.03 seconds

Determination of pesticides in dead wild birds in Korea (우리나라 폐사 야생조류에서의 농약 분석)

  • Kim, MeeKyung;Yun, Seon Jong;Kim, Dong-Gyu;Bong, Young-Hoon;Kim, Heuijin;Jang, Jung-Hee;Chung, Gab-Soo
    • Korean Journal of Veterinary Research
    • /
    • v.48 no.2
    • /
    • pp.131-137
    • /
    • 2008
  • Pesticides are extensively used for the control of crop pests in agriculture and forestry. Organophosphate (OP) and carbamate pesticides are especially effective for the control of a variety of harmful insects. However, these cholinesterase inhibitors are also dangerous to non-target organisms (wildlife and other animals) because of their high acute toxicity. Most poisonings by pesticides occur as a result of misuse or accidental exposure, but intentional killing of unwanted animals also occurs. At the request of a local autonomous entity, we investigated wild bird poisonings by pesticides from 2003 to 2007. The 207 suspicious samples of pesticide poisoning based on the necropsy were analyzed by GC/NPD, GC/FPD, or GC/MSD. We looked for trends in the identification of pesticides in wild birds thought to have died from poisoning. Pesticides were determined in 59% of the total samples analyzed. Phosphamidon and monochrotophos were the most common pesticides identified, which amounted to 77% of the subtotal. Other OP and carbamate pesticides were also found in various concentrations from dead wild birds. The determined rates of pesticides were as high as 86% and 76% in 2003 and 2006, respectively, during an outbreak of avian influenza in Korea.

Analysis of residual pesticides in dead wild birds and other animals during 2008-2009 in Korea (2008-2009년 국내 폐사 야생조류 및 동물 체내의 잔류농약 분석)

  • Jang, Jung-Hee;Bong, Young-Hoon;Kim, Dong-Gyu;Kim, MeeKyung;Chung, Gab-Soo;Son, Seong-Wan
    • Korean Journal of Veterinary Research
    • /
    • v.50 no.3
    • /
    • pp.197-203
    • /
    • 2010
  • Pesticides are useful to eliminate harmful insects and grow crops however, misuse and abuse of pesticides may cause a death of wild birds, livestock, and companion animals. We analyzed residual pesticides in the ingesta and tissues from the dead wild birds, livestock, and companion animals which were suspected pesticide poisoning based on the diagnosis of the Animal Disease Diagnostic Center of National Veterinary Research and Quarantine Service (NVRQS). The samples were primarily brought to NVRQS from local communities and veterinary diagnostic laboratories. The 231 suspicious samples of pesticide poisoning based on the necropsy were analyzed by GC/NPD, GC/FPD, GC/ECD, or GC/MSD in 2008 and 2009. Pesticides were identified from the 55 samples of total 143 samples analyzed in 2008 and from the 34 samples of total 88 samples analyzed in 2009. The pesticide identification rates in 2008 were higher than the rates in 2009. It may have relevance to the increased samples with the outbreak of avian influenza in 2008 in Korea. The concentrations of pesticides found in the dead animals varied and exceeded the respective $LD_{50}$ of pesticides in many cases. Monochrotophos, phosphamidon, and methomyl were the most common pesticides found and those pesticides are high rank sales in Korea. The cause of pesticide poisoning in animal is assuming a misuse and an abuse of commonly used pesticides in Korea.

Determination of Economic Threshold Level of Whitefly, Dialeuropora decempuncta (Quaintance and Baker) in Mulberry, Morus alba L.

  • Bandyopadhyay, U.K.;Santhakumar, M.V.;Saratchandra, B.;Das, K.K.
    • International Journal of Industrial Entomology and Biomaterials
    • /
    • v.4 no.2
    • /
    • pp.133-136
    • /
    • 2002
  • Whitefly, Dialeuropora decempuncta (Quaintance rind Baker) (Homoptera: Aleyrodidae) has attained the major pest status in mulberry, causing 24% crop loss by sucking the leaf juice and manifesting leaf curl, chlorosis and sooty mould desease during monsoon season in West Bengal, India. The assessment of economic threshold revel is an essential component for formulating the management practices. Experiments were carried out by inoculating five different densities of whitefly viz.,10, 20, 30, 40 and 50 adults on covered mulberry plants in glass houses. From the findings, it was observed that irrespective of released density, no crop loss was observed in the initial period. But with the passing of days, the percent crop loss was increased rapidly. The linear relationship between percent crop loss and number of adults released was established to highlight the significance of economic threshold. The statistical analysis in the linear form of equation showed that initial population of 10, 20, 30, 40 and 50 whiteflies/plant causes 3%, 12%, 21%, 30% and 40% crop loss in a period of 28 days which is equivalent to 57 kg, 247 kg, 437 kg, 626 kg and 816 kg leaf/acre. Execution of management practices (spray of 0.01% monocrotophos) are economical to the farmer whenever the loss is above 247 kg/acre, but below which application of control measures is not economical. From this study, it can be inferred that the economic threshold level far whitefly is 20 individuals/plant beyond which a farmer has to take appropriate control measures.

Chemical Control of the Pine Gall Midges (Thecodiplosis japonensis Uchida et Inouye) VII. Improvement of the Trunk Implantation Methods of Systemic Insecticides (솔잎혹파리의 약제방제에 관한 연구 VII. 침투성 살충제의 수간주입방법 개선에 관한 연구)

  • Choi Seung-Yoon;Park Hyung-Man;Chung Bu-Ken
    • Korean journal of applied entomology
    • /
    • v.21 no.4 s.53
    • /
    • pp.191-194
    • /
    • 1982
  • Using the two different trunk-implantation methods, the systemic insecticides omethoate $(Folimat^{(R)}\;50\;EC)$, vamidothion $(Kilval^{(R)}\;40\;EC)$, methamidophos $(Tamaron^{(R)}\;60\;SL)$, phosphamidon $(Dimecron^{(R)}\;50\;EC)$, monocrorotophos $(Nuvacron^{(R)}\;24\;EC)$, dimethoate $(Rogor^{(R)}\;50\;EC)$, and phosalone$(Rubitox^{(R)})$ were evaluated for the control of the pine gall midges(Thecodiplosis japonensis Uchida et Inouye). Except phosalone, all the insecticides tested in this experiment were very effective for the suppression of the gall incidence by the insects. There was no significant difference in effectiveness between the conventional drilling and improved Mauget methods, and trunk-implantation of the insecticides by the improved Mauget method seemed to be much more feasible in practical view points of the labor cost saving the recovery of the holes drilled.

  • PDF

Insecticide Susceptibility of Field-Collected Populations of the Spiraea Aphid, Aphis citricola(van der Goot)(Hemiptera: Aphididae) in Apple Orchards (사과 과수원에서 조팝나무진딧물의 살충제 감수성)

  • ;;Naoki Motoyama
    • Korean journal of applied entomology
    • /
    • v.32 no.3
    • /
    • pp.259-264
    • /
    • 1993
  • The experiment was carried out to investigate Insecticide susceptibility of the spiraea aphid (Aphis citricola) in apple orchards In Korea, using dipping method. Although insecticIde susceptibility vaned with local and seasonal populations, the susceptibility to demeLon S-rnethyl and phosphamidons was different from that Lo the other insecticides. The LCso values were 10 ppm for deltamethrin and chloropyrifos, 103 ~ 629 ppm for demeton S-methy1, acephate, phosphamidon, monocrotophos and vamldothion, 12,200 ppm for EPN, and 1,745 ppm for pirimicarb. 'When Insecticide susceptibility was compared between the S-clone selected from a population on the host plant spiraea and the R-clone selected from a population on the apple tree, the resistance ratio as expressed by RIS ratio of $LC_{50}$ was 78 for phosphamidon and 546 for pirimicarb. Esterase zymogram determined by the agar gel electrophoresIs revealed a significant difference between the clones. The activity of the E2, E5, E6 and E7 of the R-clone was higher than that of the S-clone, It is suggesLed that the Increased esterase activity may be involved in the mechanism of insecticide resistance in the spiraea aphid, although the involvement of other factor(s) may not be ruled out.

  • PDF

Residual Multi Pesticides Screening of Dead Birds by Orbitrap High Resolution Mass Spectrometry (오비트랩 고분해능 질량분석기를 이용한 폐사 조류 중 다성분 잔류 농약 스크리닝 기법)

  • Lee, Doo-Hee;Kim, Bo-Kyong;Wang, Seung-Jun;Son, Ki-Dong;Jung, Hyen-Mi;Choi, Jong-Woo
    • Korean Journal of Environmental Agriculture
    • /
    • v.36 no.4
    • /
    • pp.269-278
    • /
    • 2017
  • BACKGROUND: The objective of this study was to evaluate screening method of residual multi pesticides in dead birds by Orbitrap high resolution mass spectrometry (HRMS) to identify the cause of death for birds. METHODS AND RESULTS: Extraction and clean-up method of residual pesticides in liver of dead birds was used QuEChERS (Quick Easy Cheap Effective Rugged and Safe) and method validations was conducted using liquid chromatography and gas chroamtography with triple-quadrupole mass spectrometer (LC/MS/MS and GC/MS/MS) Also, we were evaluated screening method for the determination of residual pesticides in liver of dead birds by LC and GC Orbitrap Mass Spectrometry. Results of method validations, Correlation coefficients of the matrix matched calibration curves were >0.978, and the method detection limits (MDLs) and limits of quantitation (LOQ) were 2.8~72.1 ng/g (18.4 ng/g on average) and 9.0~230 ng/g (58.5 ng/g on average). The accuracy ranged from 69.1%to 130% (103% on average), and the precision values were less than 14.8%(3.8%on average). The screening of residual pesticides in liver of dead birds by LC and GC Orbitrap HRMS was detected monocrotophos, carbofuran, carbosulfan, deltametrin, benfuracarb, carbofuran, phosphamidon, prochloraz in investigated samples. CONCLUSION: This results showed that accurate mass were extraction of residual pesticides in dead birds by Orbitrap HRMS. It suggested that this screening method is applicable to the residual pesticide analysis for the cause of death as a main tool.