• Title/Summary/Keyword: 잎응애

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Regulation of Spider Mite Populations by Predacious Mite Complex in an Unsprayed Apple Orchard (장기간 약제 무살포 사과원에서 포식성 응애류에 의한 잎응애류 밀도 억제)

  • 김동순;정철의;김시용;전홍용;이준호
    • Korean journal of applied entomology
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    • v.42 no.3
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    • pp.257-262
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    • 2003
  • Spider mites and their predacious mites were surveyed in an apple orchard where pesticides have not been applied for a long time, to understand the undisrupted predacious mite complex and their role in the controling spider mites. Spider mites occurring in the orchard were different to those in conventional orchards. A few Tetranychus urticae and Panonychus ulmi were observed, while T. kanzawai was abundant during growing season. Four species of phytoseiids, Amblyseius eharai, A. kokufuensis, A. womersleyi and Typhlodromus vulgaris, and one stigmaeid species of Agistemus terminalis were observed from leaf samples in the orchard. Among them, T. vulgaris occurred from early cool season with low T. kanzawai densities through to mid-and late-season. A. womersleyi was observed only during mid-season when T. kanzawai densities were high with hot weather. Amblyseius eharai and A. kokufuensis occured only in early season, but A. terminalis density increased from mid-season and lasted to late-season. The predacious mite complex regulated the density of T. kanzawai approximately under 8 mites per leaf. Tentatively concluding, T. vulgaris is an adaptable predator at lower prey density under cool weather condition, and A. womersleyi is effective predator at higher prey density under hot weather condition. Further, the biological control strategies of spider mites in Korean orchards were discussed based on the predacious mite complex.

Taxonomic Studies on Spider Mites (Tetranichidas: Acarina) of III. Spider Mites Parasitic on Conifers (한국산 응애과(거미강: 진드기목)의 분류학적 연구 3. 침엽수에 기생하는 응애류)

  • Lee, Won-Koo;Lee, Byung-Hoon;Kim, Byung-Jin
    • Animal Systematics, Evolution and Diversity
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    • v.5 no.1
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    • pp.13-24
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    • 1989
  • Specimens of spider mites parasiting on conifer trees were collected from Korea during the period from May, 1986 to June, 1988. As a result, seven species belonging to the tribe Tetranychini, subfamily Tetranychinae, family Tetranychidae were identified as follows: 1. Panonychus citri(McGregor, 1916), *2. Oligonychus clavatus(Ehara,1959), *. O.hondoensis(Ehara,1954), *4. O.pustulosus Ehara, 1962, 5. O.karamatus(Ehara, 1956), 6. O.perditus Pritchard and Baker, 1955, 7. O. ununguis(Jacobi, 1905). Of which, three species with asterisk are newly recorded from Korea.

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Amplified mitochondiral DNA identify four species of Tetranychus mites (Acarina: Tetranychidae) in Korea (미토콘드리아 DNA증폭을 이용한 한국의 잎응애속(Tetranychus;Acarina: Tetranychidae) 4종의 동정방법)

  • 이명렬;이문홍
    • Korean journal of applied entomology
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    • v.36 no.1
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    • pp.30-36
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    • 1997
  • Except for a cosmopolitan and major pest of apples, Tetranychus urticae Koch, Tetranychus mites in Korea such as T. viennensis Zaher, T. kanzawai Kishida, and T. truncams Ehara have been considered as quarantine pests by Canada and United States. Even though these mites are not feeders on apples, they are suspected to attach accidentally on apple h i t s in autumn as females enter the diapause. The characters used to identify Tetranychus mites have been confined to the shape of aedeagus in adult male. To develope a fast and accurate alternative identification protocol applied to hibernating female mites on apples, their mitochondrial DNA (mtDNA) were examined to find out any polymorphisms to discriminate each species from the other ones. Three pairs of primers for polymerase chain reaction (PCR) were used to amplify cytochrome oxidase subunit I (CO-I) coding region in mitochondrial DNA5 of four species of Tetranycus mites. The longest amplified product was estimated its size as about 680 bp. Digestion with restriction enzymes, AluI, Ddel, and Sau3A, showed length polymorphisms, which will he useful as diagnostic markers to identify Tetranychus mites. Schematic restriction maps in amplified region were shown for each species.

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Phytoseiid Mites (Acari: Phytoseiidae) from Korean Apple Orchards and Their Ecological Notes (사과원에 서식하는 포식성 이리응애류(Acari: Phytoseiidae)의 종류 및 생태)

  • 정철의;김시용;이순원;이준호
    • Korean journal of applied entomology
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    • v.42 no.3
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    • pp.185-195
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    • 2003
  • Phytoseiid mites are important predators of spider mites, rust mites and many of insect pests as well. From two-year (2001-2002) survey of apple orchards in Kyoungbuk and Suwon area, 13 species of phytoseiids, 12 species of the genus Amblyseius and one species of the genus Typhlodromus were found. Among them, Amblyseius womersleyi was the most dominant followed by A. rademacheri, A. orientalis, and A. makuwa. Amblyseius rademacheri and A. makuwa were mainly found from ground vegetation. Keys to genera and species were presented with some pictorial details and ecological notes of each species. Further discussion on systematics of the family Phytoseiidae and use in apple IPM were suggested.

Effects of Humidity and Citrus Leaf Age on the Multiplication of Aculops pelekassi (Acari: Eriophyoidea) and Seasonal Population Abundances in Citrus Orchards (습도와 감귤 잎의 연령이 귤녹응애 증식에 미치는 영향 및 감귤원에서 발생소장)

  • Seo, Yon Dong;Kim, Dong-Soon
    • Korean journal of applied entomology
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    • v.53 no.1
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    • pp.1-6
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    • 2014
  • The pink citrus rust mite, Aculops pelekassi (Keifer) (Acari: Eriophyoidea), is an important pest in the citrus orchards of Jeju, Korea. This study was performed to investigate the seasonal population abundance of A. pelekassi, and the effects of humidity and citrus leaf age on the multiplication of this pest. Relative humidity (RH) significantly affected the longevity and fecundity of A. pelekassi. Longevity was 7.5, 14.5 and 14.6 d and fecundity was 5.4, 21.5, and 27.1 eggs at 33, 75 and 84% RH, respectively. The leaf age of citrus significantly affected the multiplication of A. pelekassi. The population abundance on 40 day-old leaves was much higher more than 3 times that on 10-day old leaves at 4 weeks after introduction. Overwintered A. pelekassi adults between the bud scales of the citrus trees became active in late April; they were found on newly emerged leaves, followed by their settlement on young fruits in mid-June. The population levels of A. pelekassi peaked on the leaves in late June to July, and on the fruits in early August. The results obtained in this study should be useful for the control of A. pelekassi in citrus orchards in Jeju.

Phytoseiid Mites (Acari: Phytoseiidae) of Pear Orchards Cheonan Area in Korea (천안지역 배 과원에 서식하는 포식성 이리응애류 (응애아강: 이리응애과))

  • Jung, Chul-Ui;Lee, Joon-Ho
    • The Korean Journal of Soil Zoology
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    • v.9 no.1_2
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    • pp.24-28
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    • 2004
  • Predaceous phytoseiid mites can be important components in integrated mite management program including bio-logical control of spider mites. While conducting population study of prey-predator system in pear orchards, 6 predaceous phytoseiids were found. Amblyseius womersleyi, A. eharai, A. kokufuensi and A. finlandicus were mostly found from tree canopy. While A. rademacheri was restricted in ground vegetation, A. makuwa was equally distributed in ground vegetation and tree trunk. Some ecological information for each species was reviewed. Strate-gies for their potential utility in pest management program and future study area were discussed.

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Four Mites of the Genus Lasioseius (Acari: Mesostigmata: Ascidae)from Korea (한국산 Lasioseius속 (Acari: Mesostigmata: Ascidae) 4미기록종)

  • 이소영;이원구
    • Animal Systematics, Evolution and Diversity
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    • v.14 no.1
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    • pp.13-19
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    • 1998
  • 한국 토양 및 식물의 잎에서 채집한 떠돌이응애 과(Ascidae) 화살응애 속 (Lasioseuius 신칭) 4미기록종, 구멍화살응애(L. porulosus), 화살응애(L. sugawarai), 잎화살응애(L. lasiodactyli), 이리화살응애(L. youcefi)를 보고한다.

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Preference of Apple Leaves of Three Cultivars, Fuji, Tsugaru and Hongro by Tetranychus urticae Koch and Its Life Table Analysis (점박이응애의 사과 품종(후지, 쓰가루, 홍로)에 대한 선호성과 생명표 분석)

  • Kim, Young-Il;Jung, Chuleui
    • Korean journal of applied entomology
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    • v.60 no.1
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    • pp.63-70
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    • 2021
  • Two-spotted spider mite (TSSM), Tetranychus urticae Koch (Acari: Tetranychidae) is one of the major pests in apple orchards. TSSM was known to show different population dynamics depending on apple cultivars. We tested the host plant preference and fitness of TSSM on the leaves of 3 apple cultivars, Fuji, Tsugaru, and Hongro. TSSM showed higher behavioral preference to Fuji than Tsugaru and Hongro, and showed a higher fecundity in Fuji. The immature development of this mite was the shortest in Fuji and longest in Hongro. Total fecundities were not significantly different among cultivars, but daily fecundity was higher and longevity was lower in Fuji. Hongro was the less preferred cultivar for TSSM, and showed the lowest fitness by life table parameters. These results could explain the possible mechanisms of differential population dynamics among apple cultivars. Further study including diverse apple cultivars currently available in Korea could help to deploy time- and cultivar- specific IPM tactics.

Oribatid Mites (Acari: Oribatida) Collected from Rice(Oryza sativa L) 1. (벼에서 채집한 날개응애류 (1))

  • 최성식
    • Korean journal of applied entomology
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    • v.34 no.2
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    • pp.132-139
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    • 1995
  • The present work was dealt with the twelve species of orbatid mites from leaves, stems and stubbles of rice( Oryza sativa L). Among them six species, that is, Protoribates agricola, Scheloribates decarinatus, Scheloribates oryzae, Sacculozets filosus, Punctoribates manzanoensis, and Paralamellobates ceylanica are new ones in Korea. The other species are Epilohmannia palida pacifica, Podorbates cuspidatus, Tricogaulumna nipponica, Peloribate sp., Scheloribates sp., Galumna sp.

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Repellent and Pesticidal Effect of Ginkgo biloba Leaves Extracts on the Tetranichus urticae, Aphis gossypii and Myzus persicae (점박이응애(Tetranichus urticae), 목화진딧물(Aphis gossypii)과 복숭아혹진딧물(Myzus persicae)에 대한 은행잎 추출물의 살충 및 기피효과)

  • Lee, In-Hwa;Seol, Myung-Su;Park, Jong-Dae
    • Applied Biological Chemistry
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    • v.48 no.2
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    • pp.150-154
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    • 2005
  • To overcome the problems associated with chemical pesticides, biological pest controls agent extracted from Ginkgo biloba was studied. Insecticidal activities components in Ginkgo biloba extracts were analyzed using high performance liquid chromatography (HPLC). This results of HPLC analysis, GG-W80 were included bilobalide $611\;{\mu}g/kg$, ginkgolide A $37\;{\mu}g/kg$ and ginkgolide B $243\;{\mu}g/kg$, while YG-W80 were included bilobalide $214\;{\mu}g/kg$ and ginkgolide B $46\;{\mu}g/kg$. The biological activity of Ginkgo biloba extracts were conducted to repellent and pesticidial effect of Tetranichus urticae, Aphis gossypii and Myzus persicae treated with Ginkgo biloba leaves extracts. Mortalities of adult T. urticae to green Ginkgo biloba extracts (GG-W80) and yellow Ginkgo biloba extracts (YG-W80) were shown 98.3% and 20.0%, respectively. From these results, terpenes components in Ginkgo biloba extracts could be use for biological controls for T. urticae.