• Title, Summary, Keyword: triadimefon

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Residue Analysis of Triadimefon in Wheat by Using Test Fungus and Thin Layer Chromatography (박층(薄層) 크로마토그라피와 지표(指標) 곰팡이의 이용(利用)에 의한 밀에 있어서 Triadimefon의 잔류량 분석)

  • Bhatnagar Kalpna;Lal Thakore B.B.;Mathur Sneh;Chakravarti B.P.
    • Korean journal of applied entomology
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    • v.25 no.4
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    • pp.229-233
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    • 1986
  • By using the test fungus Macrophomina phaseolina, residues of triadimefon were found in straw collected after harvest from sprayed plants of wheat varieties Kharchia and Lal Bahadur but grains contain no such residues. Thin layer chromatographic method was developed to detect residues of the fungicide which was found to be present in straw of sprayed plants of both the varieties. No residues could be detected in grain samples. It was found that triadimefon was converted in triadimenol in/to host.

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Antifungal Activity of Prochloraz and Triadimefon on Valsa ceratosperma (사과나무 부란병(腐爛病)에 대(對)한 Prochloraz와 Triadimefon의 항균성(抗菌性))

  • Hong, Jong Uck;Lee, Dong Jin;Kim, Jang Eok
    • Current Research on Agriculture and Life Sciences
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    • v.7
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    • pp.33-40
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    • 1989
  • In order to elucidate the antifungal activity of prochloraz(imidazole) and triadimefon(triazole), the mycelia of the Valsa ceratosperma were treated with the compounds in vitro. Prochloraz applied to the target pathogen inhibited mycelial growth more than triadimefon. The concentration for the 50% inhibition of mycelial growth ($I_{50}$) was 1-5 ppm in treatment of prochloraz and 5-10 ppm in treatment of triadimefon. The mycelia of Valsa ceratosperma treated with low concentration of prochloraz and triadimefon were morphologically abnormal as observed with an optical microscope. Content of total lipid and fatty acids were not changed by the treatments of prochloraz and triadimefon, respectively, in liquid medium.

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Mechanism of Action of Prochloraz and Triadimefon on Valsa ceratosperma (Prochloraz 와 Triadimefon의 사과나무 부란병균(腐爛病菌)에 대(對)한 작용기작(作用機作))

  • Hong, Jong-Uck;Lee, Dong-Jin;Kim, Jang-Eok
    • Applied Biological Chemistry
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    • v.32 no.3
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    • pp.270-277
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    • 1989
  • In order to elucidate the action mechanism of prochloraz and triadimefon, the mycelia of the Valsa ceratosperma were treated with the compounds in vitro. Analysis by GLC of the sterol extract from Valsa ceratosperma mycelia revealed one major peak and two minor peaks. Their relative retention time(RRT) relative to chloresterol were 1.29, 1.48 and 1.82, The compounds with RRT 1.29 and RRT 1.82 were identified as ergosterol and 24-methylenedihydrolanosterol by GC/MS, respectively. Five ppm of prochloraz and triadimefon applied to mycelia caused decrease in ergosterol content, whereas increase in 24-methylenedihydrolanoserol content in mycelia. The longer treatment time and the higher concentrations of the chemicals resulted in the greater decrease in ergosterol and the greater increase in 24-methylenedihydrolanosterol. Based on the analysis, it is considered that the two chemicals inhibit the ergosterol biosynthesis in Valsa ceratosperma by blocking C-14 demethylation as found previously in other fungi arid yeasts.

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Effect of Activated Carbon, Orpar or Zeolite on Leaching Loss of Fenitrothion, Triadimefon and Diniconazole in Model Green of Golf Course (골프장 모형그린에서 활성탄, Orpar또는 Zeolite의 처리가 Fenitrothion, Triadimefon, Diniconazole의 용탈에 미치는 영향)

  • Oh, Sang-Sil;Koh, Yong-Ku;Chung, Jong-Bae;Hyun, Hae-Nam
    • Applied Biological Chemistry
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    • v.44 no.2
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    • pp.97-102
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    • 2001
  • Cheju island depends on a hydrogeologically vulnerable aquifer system as its principle source of drinking water. Most of golf courses are located in the area which is important for the ground water recharge, and pesticides are applied to golf courses often at relatively high rates. Therefore, turf pesticides in golf course should be applied without adversely impacting ground water. In this experiment, downward movement of pesticides was monitored in model greens of golf course, where different adsorbents were layered in 3-cm thickness at 35-cm depth, and effect of the adsorption layer on the leaching loss of pesticides was investigated. Major leachings were observed in the periods of heavy rain and very limited leaching was observed under artificial irrigation. Fenitrothion and triadimefon, which have relatively short persistence and high adsorption coefficient, were found in the leachate in low concentrations only at the first rainfall event, around 20 days after the pesticide application. However, diniconazole, which has a relatively long half-life (97 days), was detected in the leachate during the whole period of experiment and concentration was much higher than those of the other pesticides. Maximum leachate concentrations were 1.9, 10.3, and 84.5 ${\mu}l^{-1}$ for fenitrothion, triadimefon, and diniconazole, respectively. Therefore, in golf course green which allows rapid water percolation and has extremely low adsorption capacity, persistence in soil could be more important factor in determination of leaching potential of pesticides. Total quantity of pesticides leached from the model green was <0.2% for fenitrothion and triadimefon and 1.8% for diniconazole. Adsorption layers significantly reduced pesticide leaching, and active carbon and Orpar were more effective than zeolite. In the model green having adsorption layer of active carbon or Orpar, leaching loss of pesticides was reduced below 0.01% of the initial application.

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제올라이트에 의한 농약의 흡착

  • 감상규;김길성;안병준;이민규
    • Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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    • pp.7-10
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    • 2001
  • Adsorption of the pesticides (phosphamidon, fenitrothion, triadimefon and diniconazole) in natural zeolite (CL $I_{N}$) and several synthetic zeolites was incestigated. The pesticides were not adsorbed on zeolites (Na-Pl, SOD, ANA, JBW and CAN) synthesized from Jeju scoria. The distribution coefficient ( $K_{D}$) and the Freundlich constant ( $K_{F}$) decreased in the following sequences. FC $C_{W}$ (waste catalytic cracking catalyst)>FA $U_{F}$ (FAU Synthesized from coal fly ash)>(FAU+Na-Pl)$_{SF}$ (the mixture of FAU and Na-Pl synthesized from the ratio of Jeju scoria 6 to coal fly ash 4 by weight)>CL $I_{N}$ among the zeolites; diniconazole>fenitrothion> triadimefon>phosphamidon. As the temperature was increased, the amount of pesticide adsorbed per unit mass of zeolite increased for FC $C_{W}$, FA $U_{F}$ and (FAU+Na-Pl)$_{SF}$ but it decreased for CL $I_{N}$, for all the pesticides used in this study. It was independent of pH for phosphamidon, fenitrothion and triadimefon, but decresed as pH was increased for all the zeolites used in this study.y.udy.y.y.y.y.y.y.

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Processing and Reduction Factors of Pesticide Residues in Chinese Matrimony Vine and Jujube by Drying (구기자와 대추 중 잔류농약의 건조에 따른 가공계수 및 감소계수)

  • Lee, Eun-Young;Noh, Hyun-Ho;Park, Young-Soon;Kang, Kyung-Won;Lee, Kwang-Hyen;Park, Hyo-Kyung;Kwon, Chan-Hyeok;Im, Moo-Hyeog;Kyung, Kee-Sung
    • The Korean Journal of Pesticide Science
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    • v.13 no.3
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    • pp.159-164
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    • 2009
  • This study was carried out to elucidate changes in concentration of pesticide residues in Chinese matrimony vine and jujube during drying. Test pesticides, triadimefon and triforine for chinese matrimony vine and methoxyfenozide and thiacloprid for jujube, which are commonly used for the crops in Korea, were treated to the crops by spraying and dipping. The pesticide residues in both fresh and dried Chinese matrimony vine and jujube were analyzed by using a GLC-ECD and an HPLC-DAD. Processing factors of the pesticides in Chinese matrimony vine and jujube by drying ranged from 1.41 to 2.28 and from 1.50 to 4.20, respectively. And reduction factors of the pesticides in the crops ranged from 0.29 to 0.47 and from 0.68 to 0.98, respectively. These results indicate that concentrations of the pesticides in the test crops increased after drying, while amounts of pesticides in them were diminished by drying.

Development of Synthetic Zeolites from Scoria for Pesticides Removal in the Golf Course (송이로부터 골프장 농약 제거를 위한 합성 제올라이트의 개발)

  • 감상규;안병준;주창식;이민규
    • Journal of Environmental Science International
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    • v.10 no.6
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    • pp.451-459
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    • 2001
  • Adsorption characteristics of triadimefon and diniconazole(pesticide) by natural zeolite($CLI_N$) and several synthetic zeolites were Investigated. The synthetic zeolites used En this study were as follows: Faujasite synthesized from coal fly ash($FAU_F$); Zeolite synthesized from the mixture of FAU and Na-Pl synthesized from the ratio of Cheju scoria 6 to coal fly ash 4 by weight($(FAU + Na-Pl)_{SF}$); waste fluid catalytic cracking catalyst($FCC_W$). The distribution coefficient, $K_D$ and Freundlich constant, $K_F$ decreased in the fellowing sequence : $FCC_W > FAU_F > (FAU + Na-Pl)_{SF} >CLI_N$ among the zeolites. The distribution coefficient and the adsorption capacity of $(FAU + Na-Pl)_{SF}$ for pesticides were 4.4 and 2.6 times higher for triamefon, and 2.0 and 2.4 times higher for diniconazole than those of $CLI_N$, respectively.

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Controlling effect of several surfactants on barley powdery mildew caused by Erysiphae graminis (보리 흰가루병에 대한 몇 가지 계면활성제의 방제 효과)

  • Jang, Kyung-Soo;Yoo, Joo-Hyeon;Choi, Gyung-Ja;Kim, Jin-Cheol;Cho, Kwang-Yun;Kim, Heung-Tae
    • The Korean Journal of Pesticide Science
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    • v.5 no.2
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    • pp.51-57
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    • 2001
  • Controlling effect of several surfactants on barley powdery mildew (pathogen : Erysiphae graminis) and those influence on fungicidal activity by tank-mixing with commercialized fungicides were investigated in greenhouse test with barley seedlings. While protective activity of PNPP showed 90% at $1,000{\mu}g/mL$, that of LN 13.0 91.2%, tile best among 8 surfactants used in curative test. With $500{\mu}g/mL$, LN 13.0 showed 4% of disease percentage on the first leaf of narley continuously 4 days after the curative application. Excent for PNPP, the other surfactants, including NP 13.0, LN 13.0, and PAS, showed good inhibitory activity against spore germination in water agar medium amended with those surfactants. PAS, which showed very poor effect against barley powdery mildew in greenhouse test, strongly inhibited spore germination. Fungicide of triadimefon and triforine showed no controlling activity against Erysiphae graminis in narley seedlings, but they highly controlled powdery mildew in case of addition with $500{\mu}g/mL$ of LN 13.0 and Tween 20. SP 13.0, NP 13.0, LN 13.0 and DBC showed severe phytotoxicity in first leaf of barley seedlings, but Tween 20, SLIS, PAS, and PNPP not at $1,000{\mu}g/mL$.

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Determination of 105 pesticide residues by GC/MS/MS (GC/MS/MS를 이용한 105종의 잔류농약 분석에 관한 연구)

  • Kim, W.S.;Do, J.A.;Lee, H.J.;Lee, J.Y.;Yang, S.J.;Lee, S.H.
    • Analytical Science and Technology
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    • v.23 no.4
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    • pp.395-404
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    • 2010
  • A multi-residual method using gas chromatography coupled with mass spectrometry (GC/MS/ MS) was developed for the analysis of 105 pesticides. This method was tested on lemons, beans and other vegetables. The pretreatment of these pesticides was performed by liquid-liquid partition followed by cleanup with solid phase extraction cartridge (SPE Florisil), after acetonitrile extraction from matrices and sodium chloride (15 g) addition. The recovery ranged from 71.1% to 126.0% except for azinphosmethyl, famoxadone, fenamidone, flufenoxuron and triadimefon in lemons and from 72.5% to 124.5% in bean. In lemon, the limit of detection (LOD) and limit of quantification (LOQ) were 0.001~150 ng/ mL and 0.004~500 ng/mL, respectively.

Control of Powdery Mildew (Uncinula necator) in Vineyards by Spraying and Vapor-Action Treatments of Triazole Fungicides (Triazole계 살균제의 살포 및 훈증처리에 의한 포도 흰가루병(Uncinula nectator)의 방제)

  • 오정행
    • Korean Journal Plant Pathology
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    • v.12 no.3
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    • pp.316-323
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    • 1996
  • 비가림재배 포도원에서 발생하는 흰가루병에 대하여 triazole계 살균제 flusilazole, myclobutanil, difenoconazole, penconazole, triflumizole, triadimefon의 방제 효과를 검정한 결과는 다음과 같다. 살균제 처리구의 이병과방율과 이병엽율은 무처리구에 비해 현저히 감소하였고, 이들의 방제가는 과방에서 약제에 따라 94.7∼97.9%, 잎에서 85.5%∼90.9%였으며 대조약제인 polyoxin B의 방제가와 유사한 정도를 보였다. 공시살균제의 보호효과는 살균제를 병발생 1주일전에 살포하는 경우, 살포 3주 후에 방제가는 약제에 따라 72.2∼90.5%였으나 4주 후에는 21.2∼41.6%로 감소하여 대조약제 polyoxin B의 52.5%보다 감소시켰으나 myclobutanil의 발아억제 효과는 약제 농도증가에 크게 영향받지 않았다. 살균제에 침지한 cheesecloth를 포도원 선반에 매달아 조사한 공시살균제의 훈증효과는 살포농도의 2배로 처리했을 때 처리점으로부터 반경 30cm이내의 포도송이에서는 약제에 따라 57.2∼71.1%의 방제가를 보였으나 전체 식물체에서는 49.1∼65.8%로서 10일 간격으로 3회 살포한 것 보다 낮은 방제가를 보였다.

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