| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Outline of Final Research Achievements |
Patania ruralis, which is a soybean pest, is considered to alternate its host plants between urticaceous plants and soybean. However, why the moth alternate hosts had been poorly understood. In this study, ecological reason and behavioral factor were investigated. Larval growth test suggests that the moth does not change to a superior food choice host in order to improve its growth. However, percentage of parasitism was remarkably higher on B. sylvestris than on soybean. This suggests that this moth may alter its host in order to avoid parasitism. On the other hand, oviposition preference is not responsible for host alternation. One alternative hypothesis is that host alternation may be caused by changes in attraction to the hosts. However, significant results were not observed in the attraction tests.
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