• Title, Summary, Keyword: Diazinon

Search Result 244, Processing Time 0.04 seconds

Joint Toxic Action of Mixtures of Organophosphorus and Carbamate Insecticides to Nilaparvata lugens and Nephotettix virescens (벼멸구(Nilaparvata lugens)와 끝동매미충(Nephotettix virescens)에 대(對)한 유기인계(有機燐系).Carbamate계(系) 살충제(殺蟲劑) 혼합(混合)의 협력작용(協力作用))

  • Chung, Bu-Keun;Mochida, Osamu;Choi, Seung-Yoon
    • Korean journal of applied entomology
    • /
    • v.26 no.3
    • /
    • pp.159-163
    • /
    • 1987
  • The toxicity of the mixture at 1 to 1 ratio among the insecticides, BPMC, carbofuran, diazinon and monocrotophos to the brown planthopper (BPH), Nilaparvata lugens and green leafhopper (GLH), Nephotettix virescens were tested and compared to their toxicities of individual insecticides. Among the mixtures, carbofuran combinations with BPMC and diazinon showed synergistic effect in toxicity to BPH. There was also synergistic action in toxicity with mixture of BPMC plus monocrotophos to GLH. Other combinations were independent in toxic action to both insects.

  • PDF

Histopathological Effects of Diazinon in Rat Liver (Diazinon을 투여한 rats에 있어서 간의 병리조직학적 변화에 관한 연구)

  • 홍사욱;권영일;정규혁
    • Environmental health and toxicology
    • /
    • v.8 no.1_2
    • /
    • pp.19-29
    • /
    • 1993
  • The toxicity and histopathologic changes of diazinon (O, O-diethy-O-(2-isopropyl-6-methyl-4-pyrimidinyl)phosphorothioate) was investigated in rat. Rat was treated with diazinon (100 mg/kg/day) by oral administration for 12 days. The experimental results were summarized as follows. Biochemical parameters such as ALT, AST, LDH and glucose in serum were significantly increased and hematological parameters such as Hb, Hct and PLT in blood were slightly increased in treated groups. Also the activities of serum cholinesterase were very significantly decreased in treated groups. In the histopathological changes, the normal lobular architectural pattern of the liver was well preserved in all treated groups. However, vacuolation or fatty change were represent in hepatocytes. Sections of liver from rats treated with diazinon for 3 and 6 days contained slight lipid infiltration in the form of small droplets randomly distributed that were graded minimal (+) or moderate (++) compared with the respective control condition. After 9 days, there were numerous small and large vacuoles in the terminal hepatic venule and perilobular areas of many serial sections of these rats indicative of fatty infiltration which were graded moderate (++) and severe (+++). After 12 days, fatty infiltration progressed periportal tract areas and graded severe (+++) and very severe (++++) in experimental groups. Note absence of cellular necrosis or inflammation.

  • PDF

Effect of Diazinon on the Cytoplasmic Organelles of Hepatocytes in Albino Mice (Diazinon이 Mouse의 간세포내 미세구조에 미치는 영향)

  • Kim, Y.H.;Chung, H.S.;Lee, K.S.
    • Applied Microscopy
    • /
    • v.14 no.2
    • /
    • pp.66-80
    • /
    • 1984
  • The organic phosphorus compounds have been widely used as an insecticide, since toxicity of these compounds is especially drastic to the insects than to men and other mammals. The organic phosphates are rapidly hydrolized and hence have little cumulative and ecologic effects. However, due to their acute toxic effects organophosphate have recorded rather high fatalities in men and domestic animals. The organic phosphorus compounds are powerful inhibitors to the carboxylic esterase enzymes such as acetylcholinesterase and pseudocholinesterase. As a result of firm binding characteristics of phosphate radicals to the active sites of enzyme, the activities of these enzymes are inhibited by the organophosphates. The organophosphates such as diazinon is easily observed from skin, gastrointestinal tract, conjunctivas and respiratory tract, and it is converted to more toxic form during metabolism in the liver The present study was carried out in order to investigate the hepatotoxicity of diazinon by observing the changes in the ultrastructure of cytoplasmic organelles of hepatic cells in albino mice. The animals were killed at 6, 12 and 24 hours after administration of 25mg/kg diazinon. The piece of hepatic tissue obtained from each animal was ultrathinly sectioned. The specimens stained by uranyl acetate and lead citrate double contrast methods were observed with JEM model 100B electron microscope. The results obtained were as follows: 1) A prominent dilatation and sacculation of the cisternae of rough endoplasmic reticulum associated with detachment of membrane bound-ribosomes, and disaggregation of the free ribosomes were recognized. 2) The hypertrophy of the smooth endoplasmic reticulum associated with depletion of the glycogen particles was observed. 3) The atrophy of cisternae of Golgi complex was observed. 4) A large number of secondary lysosomes (autophagic vacuoles and residual bodies) were formed. Consequently it is suggested that diazinon would induce disorganization of the cytoplasmic organelles of hepatocytes in albino mice.

  • PDF

Effects of Several Insecticides on the Biology and Population of the Brown Planthopper, Nilaparvata lugens STAL (몇가지 수도용 살충제 처리가 벼멸구 차세대 밀도에 미치는 영향)

  • Lee Hyung-Rae
    • Korean journal of applied entomology
    • /
    • v.23 no.3
    • /
    • pp.172-176
    • /
    • 1984
  • The insecticides MIPC, BPMC, carbofuran and diazinon were treated to the brown planthopper (BPH) , Nilaparvata lugens STAL, at the dose levels of $LD_{10}\;and\;LD_{50}$(by topical application)/at the rate of 40kg/ha (product base) (by dusting or broadcasting on potted rice). The BPH population in the first generation was significantly decreased in the topical treatments compared to the untreatment. The number of BPH offsprings was relatively greater at the dose level of $LD_{10}\;than\;of\;LD_{50}$. The number of nymphs, however, were greatly varied with the insecticides. The offsprings from the BPH treated with the rate of 40kg/ha showed longer nymphal periods and higher adult emergence, but except diazinon treatment, rather less egg-numbers were observed. The BPH population density was significantly decreased in general up to 38 days after treatment(DAT) in the treated pots. Among the insecticides tested, however, only diazinon induced greater number of insects at the 54 DAT compared to the untreated pots.

  • PDF

Residues of Diazinon in Growing Chinese cabbage: A study Under Greenhouse Conditions

  • Khay, Sathya;El-Aty, A.M. Abd;Lim, Kye-Taek;Shim, Jae-Han
    • Korean Journal of Environmental Agriculture
    • /
    • v.25 no.2
    • /
    • pp.174-179
    • /
    • 2006
  • Chinese cabbage, Braccica campestris has long been consumed as a staple food for Koreans in various forms of fresh, salted, and fermented Kimchi. Cultivation of the crop under greenhouse has become a general practices to fulfill its off-seasonal consumer's demand. However, agricultural practices of the crop have always accompanied with heavy applications of pesticides caused by severe outbreaks of diseases and pose under warm and humid circumferences. Since dissipation patterns of pesticide residues in/on the crop under greenhouse conditions ate quite different from those in the open-air, changes of diazinon, O,O-diethyl O-2-isopropyl-6-methylpyrimidin-4-yl phosphornthioate, in/on the Chinese cabbage applied by foliar spraying under greenhouse were studied. Diazinon 34% EC was applied with dilution of recommended and double dose to the crop. The shoots of crop were harvested immediately after this application and at regular intervals over a 10-day. After sample preparations, the diazinon residue was analyzed using gas chromatography equipped with electron capture detector (GC/ECD). Initially deposited amount of the chemical in/on the crop right after applications with recommended and double doses were 8.3 and 15.2 mg/kg, respectively. The residue levels after 10 days of application were 0.03 and 0.09 mg/kg with 1.3 and 1.5 days of half-life in/on the crop, respectively. In consequent 10 days of pre-harvest interval (PHI) for diazinon EC formulation in/on Chinese cabbage under greenhouse condition was fulfill maximum residue level set by Korea Food and Drug Administration (KFDA, 0.1 mg/kg).

Susceptibility of ussur brown katydid, Paratlanticus ussuriensis (Orthoptera: Tettigoniidae) to commercially registered insecticides (갈색여치에 대한 살충제의 감수성)

  • Ahn, Ki-Su;Yang, Jeong-Oh;Noh, Doo-Jin;Yoon, Chang-Mann;Kim, Young-Jae;Kim, Gil-Hah
    • The Korean Journal of Pesticide Science
    • /
    • v.11 no.3
    • /
    • pp.194-200
    • /
    • 2007
  • Insecticidal activity of 33 registered insecticides was tested against last nymphal instars and adults of ussur brown katydid (Paratlanticus ussuriensis). All experiments were tested at the recommended concentration of each insecticides by producer. Acephate, chlorpyrifos, diazinon, EPN and fenitrothion which were organophates, and a mixture combined with chlorpyrifos+${\alpha}$-cypemethrin showed 100% mortality of P. ussuriensis. But fipronil showed only 100% mortality in leaf-dipping method. Carbamates insecticidal groups, benfuracarb and furathiocarb were showed over 80% and phenthoate was $60{\sim}80%$ in mortality of P. ussuriensis. Among the mixture, etofenprox+diazinon and esfenvalerate+fenitrothion were showed 60-80% against last nymphal instars of P. ussuriensis. Otherwise, acephate, chlorpyrifos, diazinon, EPN and fenitrothion were showed 100% mortality of P. ussuriensis within only 24 hours after treatment, but there was no effective after then in residual tests with leaves.

Temporary Persistance of Pesticide Residue of Diazinon, Iprodione and Chlorfenapyr during the Cultivation Periods in Shallot (Allium ascalonicum L.) (쪽파(Allium ascalonicum L.) 재배기간 중 Diazinon, Iprodione 및 Chlorfenapyr의 잔류량 변화)

  • Ko, Kwang-Yong;Na, Eun-Sik;Kim, Sung-Hun;Kim, Sang-Jun;Jang, Young-Hee;Lee, Kye-Seung
    • Korean Journal of Agricultural Science
    • /
    • v.32 no.2
    • /
    • pp.223-231
    • /
    • 2005
  • In order to know the residual pattern of pesticides and predict to the degradation period until below MRL, we experimented diazinon, iprodinon and chlorfenapyr for shallot. They were the most detected pesticide in shallot by NAQS (National Agricultural product Quality management Service) survey. In this experiment, we sprayed those pesticides 15days before harvest and analyzed 0, 1, 2, 3, 5, 7, 10, 14 day sample to establish logical equation and to calculate $DT_{50}$. During the cultivating period, the residue amount of diazinon was changed from 1.02 mg/kg (0 day) to 0.01 mg/kg (14 day), $DT_{50}$ was 2.19 days, and iprodione was changed from 1.45 mg/kg (0 day) to 0.14 mg/kg (14 day), $DT_{50}$ was 4.15 days, and chlorfenapyr was changed from 1.5 mg/kg (0 day) to 0.01 mg/kg (14 day), $DT_{50}$ was 1.97 days. The $DT_{50}$ of double amount in those pesticides, diazinon was 2.24 days, iprodione was 4.82 days, and chlorfenapyr was 2.24 days, respectively.

  • PDF

Effects of Side-furrow-treated Carbofuran (3G) on the Control of Onion Maggots (Hylemyia antiqua Meigen; Anthomyiidae) and on the Growth Response of Garlics (Carbofuran (3G) 조춘토중처리에 의한 고자리파리의 방제 및 마늘의 생육촉진반응)

  • Choi S.Y.;Lee S.W.;Chung B.K.
    • Korean journal of applied entomology
    • /
    • v.22 no.4
    • /
    • pp.271-276
    • /
    • 1983
  • In field studies, the insecticides carbofuran(Furadan 3G) and diazion(3G) at the rate of 1,8 kg a.i./ha as a single side-furrowing treatment from March 13 to April 10(7 to 10 days intervals) were evaluated in terms of the control effects to the onion maggots(Hylemyia antique Meigen) and some phytotonic effects to the garlic plants. The treatments with carbofuran were significantly more effective in onion maggot control than the treatment with diazinon and untreated, and the earlier treatments the better control effects were obtained. Phytotonic effects only with carbofuran on garlic plants were of served as increases ranged $16.5\~23.2\%$ in plant heights, $22.0\~32.0\%$ in stem diameters and $15.5\~22.8\%$ in bulb diameters compared to the untreated. The greatest yield of garlics was resulted in the plots of Match-13 treatments with carbofuran, ca. 10,700kg/ha in the carbofuran treatment, ca. 5637kg/ha in the diazinon treatment and ca. 4728kg/ha in the untreated plots. The magnitude of yield increase of garlics in the plots treated with carbofuran was attributable to positively stimulate the growth response of garlic plants as well as the control effects to onion maggots.

  • PDF

Selective Toxicity of Insecticides to Plant-and Leaf-hoppers (멸구$\cdot$매미충의 종류에 따른 살충제의 선택독성)

  • Choi S. Y.;Lee H. R.
    • Korean journal of applied entomology
    • /
    • v.15 no.1
    • /
    • pp.1-6
    • /
    • 1976
  • his study was conducted to investigate selective toxicity of several organophosphorous and carbamic insecticides against the small brown planthopper (Laodelphax striatellus), the white-backed planthopper (Sogatella furcifera), the brown planthopper (Nilaparvata lugensEugens), and the green rice leafhopper (Nephotetix cincticeps). The test insecticides were the organophosphoric insecticides, Diazinon$(34\%\; Ec.,\; 3\%\; G.),$ $MEP(Sumithion 50\%\; Ec.)$, and PAP(Elsan\; 47.5\%\; Ec.)$ and the carbamic insecticides. MPMC $(Meobal\; 50\%\;WP.)$, $BPMC(Bassa\; 50\%\; Ec.)$, and carbofuran $(Curaterr; 3\%\; G.)$. Toxicitiy for emulsion concentrates and wettable powders were evaluated by dipping method of rice seedlings in the laboratory and that for granulated insecticides evaluated by submerged application with potted plants in the greenhouse. In the test of contact toxicity by seedling dips, Diazinon MEP and PAP showed significantly low toxicity to the brown planthopper and MEP to the green rice leafhopper. In the test of submerged application, Carbofuran showed almost equal toxicity to the four species of the hoppers, but Diazinon was greatly less toxic to the brown planthopper. In general. the organophosphorous insecticides tested seemed to be selective in toxicity to the species of the hoppers, while the carbamic insecticides being less selective. The carbamic insecticides such as MPMC, BPMC and Carbofuran were almost equal in toxicity to the four species of the hoppers tested.

  • PDF