• Title, Summary, Keyword: Acaricide

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Acaricide Resistance in Field-Collected Populations of Tetranychus kanzawai(Acarina: Tetranychidae) (차응애 야외개체군의 살비제 저항성)

  • 김상수;유상선;백채훈
    • Korean journal of applied entomology
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    • v.37 no.2
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    • pp.207-212
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    • 1998
  • Tea field-collected populations of the tea red spider mite (Tetranychus kazawai Kishida) from five different locations in the southern region of Korea were assessed for resistance to seven acaricides using leaf spray method. There were considerable differences in susceptibility depending on the tested acaricides and the location from which the population was collected. The populations showing high resistance ratio of more than 20 with respect to certain acaricide were as follows: the Sungjun and Cheju populations to azocyclotin, tebufenpyrad, fenpyroximate, pyridaben, propargite, and fenpropathrin; the Haenam population to propargite and fenpyroximate; the Bosung population to propargite; the Youngam population to pyridaben. Therefore, the use of other alternative acaricides against the Sungjun and Cheju populations is needed. However, careful selection of the appropriate acaricide against the Haenam, Bosung and Youngam populations of the tea red spider mite might be maintained in effective control.

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Selection of the Acaricides Selective to Harmonia axyridis and Effect of their Application on Phytophagous Mites and Natural Enemies (무당벌레에 선택적인 살비제 선발과 이들 처리가 사과원 식식성 응애류와 천적류에 미치는 영향)

  • Cho, Jum-Rae;Hong, Ki-Jeong;Lee, Gwen-Seok;Park, Byung-Ryul
    • Korean journal of applied entomology
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    • v.35 no.3
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    • pp.243-248
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    • 1996
  • This study was conducted to select the acaricides selective to H. axyridis and examine the effects on phytophagous mites and natural enemies after application of selected acaricides in the apple orchard. All the acaricides tested were more toxic to T. urticae and P. ulmi than to H. axyridis, and also were more toxic to egg than to the larva and adult of H. myridis. Azocyclotin and fenpropathrin were the highest and lowest selective acaricides to H. axyridk, respectively. The density of phytophagous mites was high affected by frequency of acaricide application. Significant difference in the changes of the density of natural enemies was not be observed according to frequency of acaricide application and kinds of acaricide. Acaricide treatment showed high effect on the population densities of A. womersleyi and Oriur spp., while less effect on Chrysopa spp.

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Acaricide susceptibilities of Field-Collected Populations of Two-spotted Spider Mite, Tetranychus urticae (Acari:Tetranychidae) from Apple Orchards (사과원에서 채집된 점박이응애(Tetranychus urticae)의 지역별 살비제 감수성)

  • Song, Cheol;Kim, Gil-Hah;Ahn, Soo-Jeong;Park, No-Joong;Cho, Kwang-Yun
    • Korean journal of applied entomology
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    • v.34 no.4
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    • pp.328-333
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    • 1995
  • Susceptibilies of tow-spotted spider mite (Tetranychus urticae Koch) collected at 6 locations were assessed to 15 acaricides. The response to acaricides were almost similar in female adults and eggs. There were considerable difference in susceptibility depending on the acaricide treated and the region from which the population was collected. The population showing resistance ratio of more than 20 with respect to certain acaricide was regarded as a resistant population to the acaricide. The resistant populations in terms of female adult were as follows: Suwon population to azocyclotin, cyhexatin, and fenbutatin-oxide; Taejon population to dicofol and fenbutatin-oxide; Chongju population to dicofoll Chinju populatin to cyhexatin, dicofol, and fenbutatin-oxide. The resistant populations in terms of egg were as follows; Suwon population to bifenthrin, clofentezine, hexythiazox, and tetradifon; Kunwi, Chongju, and Kwangju populations to bifenthrin; Taejon population to amitraz and bifenthrin; Taejon populatin to amitraz and bifenthrin; Chinju population to amitraz, bifenthrin, clofentezine, dicofol, and tetradifon. However, the female adults and eggs of all field populations were susceptible to abamectin, chlorfenson, and fenpyroximate. This tendency was also reported previously in the susceptible strain from laboratory.

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Resistance and control of cypermethrin and chlorpyrifos as acaricide for control of hard tick Haemaphysalis longicornis (acari: ixodidae)

  • You, Myung-Jo
    • Korean Journal of Veterinary Research
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    • v.54 no.2
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    • pp.117-120
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    • 2014
  • Chemotherapeutic treatment is still the foundation of tick control programs. This study investigated the acaricidal efficacy of cypermethrin alone and in combination with chlorpyrifos against Haemaphysalis (H.) longicornis. Unfed larval ticks were exposed to 0.1, 1.0, and 10 mg/mL cypermethrin for 60 min, after which the acaricidal efficacy was examined based on tick mortality. All compounds showed similar suppression curves, with the best control being achieved by cypermethrin and chlorpyrifos (1 : 1 ratio) at 10 mg/mL. Effective cypermethrin concentrations for tick control were two to seven times higher than the recommended doses, indicating resistance by H. longicornis.

Acaricidal Abilities and Chemical Composition of Forsythia suspense Fruit Oil against Storage and Pyroglyphid Mites

  • Lee, Hwa-won;Lee, Hoi-Seon
    • Journal of Applied Biological Chemistry
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    • v.58 no.2
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    • pp.105-108
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    • 2015
  • This research is aimed at evaluating the potential abilities of the natural acaricide of F. suspense oil against Tyrophagus putrescentiae and Dermatophagoides spp. Based on the $LD_{50}$ values, in contact bioassay, F. suspense oil (8.19, 3.28, and $4.35{\mu}g/cm^2$) showed acaricidal effects against T. putrescentiae, D. farinae, and D. pteronyssinus, respectively. Fumigant toxicities of F. suspense oil showed similar patterns as those observed with contact toxicities. GC/MS analysis showed the major components of F. suspense oil to be ${\beta}$-pinene (45.88%), myrtenol (13.86%), (+)-${\alpha}$-pinene (13.09%), (-)-trans-pinocarveol (7.34%), sabinene (6.64%) and pinocarvone (4.13%). These findings indicate that F. suspense oil has potential as a natural acaricide.

Occurrence of Frankliniella occidentalis and Tetranychus urticae in Rose Greenhouse and Effectiveness of Different Control Methods (시설재배 장미의 꽃노랑총채벌레, 점박이응애 발생소장 및 방제방법에 따른 해충방제 효과)

  • 조명래;전흥용;나승용
    • Protected Horticulture and Plant Factory
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    • v.9 no.3
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    • pp.179-184
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    • 2000
  • This study was conducted to improve control system of insect pests, especially western flower thrips, Frankliniella occidentalis, and two-spotted spider mites, Tetreanychus urticae, of rose greenhouses. Density of thrips was relatively higher in yellow flowers than in pink or redflowers, while there was no difference in density of two-spotted spider mites by flower colors. In pest control by an automatic monorail sprayer, 89% labor and 18.2% chemical savings, as compared to the conventional high pressure spray method, were achieved without lowering the pest control effectiveness. By using an adhesive agent in combination with acaricide, adhesion of chemical to crops increased by 25% and control effect on two-spotted spider mites increased by 20.5% as compared acaricide spray alone.

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Joint Toxic Action of Acaricide Mixtures to the Field-Collected Strain of Tetranychus urticae(Arcarina: Tetranychidae) (야외계통의 점박이응애(Tetranychus urticae)에 대한 살비제 혼합의 연합독작용)

  • 김상수;김도익;이승찬
    • Korean journal of applied entomology
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    • v.32 no.2
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    • pp.176-183
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    • 1993
  • These sutdies were conducted to investigate the joint toxic action of mixtures of several acaricides including amitraz, bifenthrin, propargite, fenbutatin dxide and bxide dicofol to the field-collected strian of Tetranychus urticae. The synergistic action of acaricidal mixtures was greatly varied with the kind of acaricide combinations and their mixture ratios. The combinations of amitraz with each of the tested acaricides were synergized at the given mixture ratios. The higher synergistic action in the each combination was observed at 2 : 8 ratio of amitraz and bifenthrin, 8 : 2 ratio of amitraz and fenbutatin oxide, 4 : 6 ratio of amitraz and propargite and 6 : 4 ratio of amitraz and dicofol.

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Simultaneous Determination of Amitraz, Bromopropylate, Coumaphos, Cymiazole and 2,4-Dimethylaniline in Korean Honey Samples by High-Performance Liquid Chromatography

  • Ryoo, Jae-Jeong;Kim, Se-Hoon;Jeong, Young-Han;Do, Hwan-Suk;Ryu, Jeong-Eun;Kwon, Hae-Young;Jeong, Ji-Yoon;Park, Hye-Jin;Lee, Soon-Ho;Hong, Moo-Ki;Hong, Jong-Ki
    • Bulletin of the Korean Chemical Society
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    • v.29 no.5
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    • pp.1043-1047
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    • 2008
  • Simultaneous determination of amitraz, bromopropylate, coumaphos, cymiazole and 2,4-dimethylaniline in 200 honey samples purchased in Korea was performed by reversed-phase high-performance liquid chromatography with multiple UV detection. 2% Acetone in hexane was used for a liquid-liquid extraction and 20-40% water in acetonitrile solutions were used as mobile phases. The LOD for the analytes varied between 0.4 and 1.5 $\mu$g/L and the recoveries were yielded between 64 and 94%. Relative standard deviation of the repeatability of the method is less than 15%. Amitraz was not present in amount above 10 $\mu$ g/L and one for coumaphos and cymiazole and two for bromopropylate, and three for 2,4-dimethylanilne were detected in amount above 10 $\mu$ g/ L. Levels of the acaricide residues found were less than 50 $\mu$ g/L.

Nonitoring of amitraz, bromopropylate, coumaphos, cymiazole in honey samples sold in 2011 (2011년 시판된 벌꿀 중 amtraz, bromopropylate, coumaphos, cymiazole 모니터링)

  • Lee, Eun Man;Ryoo, Jae Jeong
    • Analytical Science and Technology
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    • v.26 no.1
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    • pp.1-10
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    • 2013
  • It was known that many beekeepers use some acaricides to protect their bees. Among the acaricides used in bees, amitraz, bromopropylate, coumaphos, and cymiazole were used commonly in Korea. In middle of 2006, Korean government set maximum residual limit (MRL) of amitraz and coumaphos as 0.2 ppm and 0.1 ppm, respectively. Because the environment of bee farm changes every year, it is needed to monitor acaricides in honey continuously. In this work, ten samples of honey collected from local markets and internet in 2011 were tested for determination of the amount of amitraz, bromopropylate, coumaphos and cymiazole by HPLC-DAD. Levels of the acaricide residues found were less than 25 ppb.

은행잎 추출물의 응애류에 대한 살비효과 검증

  • Seol, Myeong-Su;Park, Jong-Dae;Lee, In-Hwa
    • 한국생물공학회:학술대회논문집
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    • pp.134-137
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    • 2003
  • Acaricide effect against Tetranichus urticae, Myzus persica, Spodoptera litura and Plutella xylostella with the Ginkgo biloba leaves extracts was reviewed. This result was motality 74.3%, 88.7% respectively, after tretment 24hr, 72hr about $80^{\circ}C$ water extract(GLW80, 1%) of Tetranichus urticae and the insecticide took effect showed its effect in some 50% against the other three. But, motality of Tetranichus urticae against 10% GLW80 showed its 90.6%, 98.3% after tretment 24hr and 48hr.

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