Ecological properties and interspecific relationships of quarantine pests, Bactrocera fruit flies in the original distribution areas: Elucidation from reproductive processes and host plant choices

2017 Fiscal Year Final Research Report

• Project/Area Number: 25304048
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 海外学術
• Research Field: Insect science
• Research Institution: The University of Shiga Prefecture
• Principal Investigator: SAWADA Hiroichi 滋賀県立大学, 環境科学部, 客員教授 (90259391)
• Co-Investigator(Kenkyū-buntansha): 西田 隆義 滋賀県立大学, 環境科学部, 教授 (60208189) ; 高倉 耕一 滋賀県立大学, 環境科学部, 准教授 (50332440) ; 塚田 森生 三重大学, 生物資源学研究科, 准教授 (20273352)
• Research Collaborator: Kago Hisoshi ; Kawatake Tomosi ; Kitamura Tasuku ; Hidaka Naoya ; Honma Atsusi ; Fujii Nobuyuki ; Yamaue Sigemasa ; Kitano Daisuke ; Hisaoka Tomoki
• Project Period (FY): 2013-04-01 – 2018-03-31
• Keywords: ミバエ / Bactrocera属 / B. carambolae / B. papayae / 個体群動態 / 繁殖特性 / 寄主選択 / インドネシア

Outline of Final Research Achievements

We identified five major pests of Bactrocera fruit flies, including B. papayae（BP） and B. carambolae（BC）, on the basis of field censuses conducted in West Java, Indonesia. Population density of both BP and BC exhibited clear seasonal patterns, the sharp increase and decrease in the rainy and dry seasons, respectively, presumably due to the seasonal trend of food resource abundance and of predation by ground-wandering predators. Laboratory experiments on reproductive interference between BC and BP revealed that reproductive success of BC largely dropped with the increasing proportion of BP, and that the reduced reproductive success of BC females was due to mating failure with conspecific males.

Free Research Field

農学A