| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2017: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2016: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2015: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| 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.
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