牛用駆虫剤イベルメクチンが牛糞に生息する標的および非標的糞食性ハエ類に及ぼす影響 Effects of ivermectin on target and non-target dung-breeding flies (Diptera) in cattle dung pats

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Author(s)

    • 丸山 真澄 MARUYAMA Masumi
    • Laboratory of Entomology, Obihiro University of Agriculture and Veterinary Medicine:(Present address)Independent Administrative Institution National Livestock Breeding Center Nagano Station
    • 山下 伸夫 YAMASHITA Nobuo
    • Livestock Environment Laboratory, National Agricultural Research Center for Tohoku Region, National Agricultural Research Organization
    • 渡辺 彰 WATANABE Akira
    • Meat Quality Control Laboratory, National Agricultural Research Center for Tohoku Region, National Agricultural Research Organization

Abstract

牛用駆虫剤イベルメクチンのポアオン法による投与が, 牛糞に生息する標的および非標的糞食性ハエ類に及ぼす影響について調べた.排糞中のイベルメクチンは, 処理後14または21日まで検出され, その濃度は処理後1または3日目に最大となった.処理された牛の糞において, ノサシバエとキタミドリイエバエの幼虫は14日目ですべて死亡し, 21日目でも蛹化率は減少した.羽化トラップを用いた野外実験において, 処理区でクロイエバエ, ヒメシリアカニクバエ, ツヤホソバエ科, ハヤトビバエ科, オドリバエ科などの発生は大きく減少した.環縫亜目・有額嚢群のハエの発生は, 処理後1, 3, 7日で等しく抑制された.ノミバエ科とヌカカ科の発生数は, 逆に処理区の糞で増加した.処理区において羽化したハエの乾燥重量は著しく減少し, 糞分解活動が抑制された.

The effects of antiparasitic drug, ivermectin, on the dung-breeding flies were studied in laboratory and field experiments in Hokkaido, Japan. In two pour-on treatments (500μg/kg), ivermectin was excreted in dung for up to 14 and 21 days after treatment, with peaks at 3 days and 1 day, respectively. Dung from treated cattle prevented the larval development of Haematobia irritans and Neomyia cornicina up to 14 days and reduced the larval and pupal survival rates at 21 days after treatment. In the field experiment using emergence traps, the numbers of emerged flies from dung pats were 3,655 (18 families) in control dung and 2,234 (16 families) in treated dung. Especially, Musca bezzii, Ravinia striata, Sepsis duplicata, Sepsis thoracica, Sepsis cynipsea, Sphaeroceridea, Empididae, Sciaridae and Chironomidae were severely reduced in treated dung. Reduction of cyclorrhaphaous flies similarly occurred at 1, 3 and 7 days after treatment, which coincides with high concentrations of ivermectin. Conversely, Ceratopogonidae and Phoridae increased in treated dung, regardless of days (1, 3 and 7) after treatment. Dry weights of flies emerged from dung pats of treated cattle in the field experiment were only 5.8% of those from dung of control cattle, indicating that dung-decomposing activity by fly larvae was supressed in dung of treated cattle.

Journal

  • Medical Entomology and Zoology

    Medical Entomology and Zoology 56(3), 191-199, 2005

    Japan Society of Medical Entomology and Zoology

Cited by:  1

Codes

  • NII Article ID (NAID)
    110004048931
  • NII NACSIS-CAT ID (NCID)
    AN00021948
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    0424-7086
  • NDL Article ID
    7691532
  • NDL Source Classification
    ZS17(科学技術--医学--衛生学・公衆衛生)
  • NDL Call No.
    Z19-47
  • Data Source
    CJPref  NDL  NII-ELS  IR  J-STAGE 
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