| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
|---|
| Outline of Final Research Achievements |
The lethal effects of visible light on insects were investigated by using light-emitting diodes (LEDs). It was revealed that irradiation with short-wavelength visible (blue) light killed eggs, larvae, pupae, and adults of Drosophila melanogaster. Blue light was also lethal to mosquitoes (Culex pipiens molestus), flour beetles (Tribolium confusum), and leaf beetles (Galerucella grisescens), however, the effective wavelength at which mortality occurs was species-specific, and tolerance to blue-light irradiation differed among insect species. In D. melanogaster, the effective wavelength changed with the metamorphosis. Light transmission of D. melanogaster puparia was not wavelength-specific. Therefore, it is suggested that light absorption by certain inner tissues of the fly is wavelength-specific. Furthermore, it is suggested that irradiation period longer than certain hours, as well as light intensity higher than certain level, is needed for lethal effects on insects.
|
