Effects of light quality and intensity on diapause induction in the two-spotted spider mite, Tetranychus urticae

• Suzuki Takeshi

  Graduate School of Science and Technology, Kobe University

• Fukunaga Yoshifumi

  Graduate School of Horticulture, Chiba University

• Amano Hiroshi

  Graduate School of Horticulture, Chiba University

• Takeda Makio

  Graduate School of Science and Technology, Kobe University

• Goto Eiji

  Graduate School of Horticulture, Chiba University

Abstract

It has been known that diapause is not induced in populations of the two-spotted spider mite, Tetranychus urticae, under continuous darkness (DD). When the light intensity was changed under LD 8:16 at 18°C, the threshold intensity for blue light (475 nm) to induce 50% of diapause was below 50 mW/m²; and the blue light was most effective in photoperiodic induction of diapause. The threshold intensities for green (572 nm) and orange (612 nm) light were 50–500 and 500–2,500 mW/m², respectively. T. urticae showed no sensitivity to red light (658 nm) even at 2,500 mW/m² intensity. Low diapause incidence under long wavelengths was probably due to the absence of photoreception by photoreceptor pigments for photoperiodic time measurement, or for circadian entrainment required for photoperiodic induction.

Journal

• Applied Entomology and Zoology

  Applied Entomology and Zoology 43 (2), 213-218, 2008

  JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY

Keywords

• Diapause
• LED
• light wavelength
• photoperiodism
• <i>Tetranychus urticae</i>

Details

• CRID: 1390001206242364032
• NII Article ID: 110006684222
• NII Book ID: AA00543238
• DOI: 10.1303/aez.2008.213
• ISSN: 1347605X
• ISSN: 00036862
• NDL BIB ID: 9511476
• Web Site: http://id.ndl.go.jp/bib/9511476
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9511476
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed