New Trap for Survey of Species Structure and Seasonal Dynamics of Phyioseiid Mites on Japanese Pear Trees (Acari: Phyioseiidae).

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  • Koike Akira
    Laboratory of Applied Entomology and Zoology, Faculty of Horticulture, Chiba University
  • Nemoto Hisashi
    Saitama Horticultural Experiment Station
  • Amano Hiroshi
    Laboratory of Applied Entomology and Zoology, Faculty of Horticulture, Chiba University

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Other Title
  • カブリダニ捕獲トラップ（Ｐｈｙｔｏ　ｔｒａｐ）の開発およびその利用によるナシ樹上のカブリダニ種構成と発生消長の調査
  • カブリダニ ホカク トラップ Phyto trap ノ カイハツ オヨビ ソノ リヨウ ニ ヨル ナシジュ ジョウ ノ カブリダニシュ コウセイ ト ハッセイ ショウチョウ ノ チョウサ

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Abstract

A simple new trap (Phyto trap) was invented to increase the trapping efficiency of phytoseiid mites in a pear field. The trap was made of woolen yarn, hook and loop fasteners vinyl tape. It successfully trapped many live phytoseiid mites alive when used on Japanese pear trees. Trapping efficiency was also evaluated by comparison with conventional observations of leaves, confirming the trap usefulness. Ten known species and one newly recorded species of phytoseiid mites belonging to two genera were trapped on the pear trees. The seasonal dynamics of each species were clarified. Amblyseius tsugawai was most abundant throughout the seasons. Both A. eharai and A. paraki were also abundant, but showed some seasonal fluctuations. Amblyseius eharai became abundant following an increase in the Panonychus citri population, but A. paraki abundance seemed to have no relation to the populations of prey mites.

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