Journal of the Acarological Society of Japan

Original Papers

Foraging experiences affect the importance of chemical cues in patch-leaving decision of Neoseiulus womersleyi Schicha (Acari, Phytoseiidae)

Taro MAEDA

2011 Volume 20 Issue 1 Pages 9-18
Published: May 25, 2011
Released on J-STAGE: June 25, 2011

DOIhttps://doi.org/10.2300/acari.20.9

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To investigate whether the informational value of herbivore-induced plant volatiles (HIPV) changes according to foraging conditions, eight populations of the predatory mite Neoseiulus womersleyi were reared under two conditions. The patch-leaving tendency was tested using kidney bean leaf disc in a wind tunnel as a mimic prey patch. When predators were reared under unstable rearing conditions, patch-leaving tendencies were increased by HIPV in the airflow. Patch-leaving tendencies of predators reared under stable rearing conditions were not affected by the HIPV. These results suggest that the informational value of HIPV in a predator's patch-leaving decision would differ depending on foraging conditions.

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New Record of Scaptognathides (Acari, Halacaridae) from Japan with notes on geographic distribution

Hiroshi ABÉ

2011 Volume 20 Issue 1 Pages 19-25
Published: May 25, 2011
Released on J-STAGE: June 25, 2011

DOIhttps://doi.org/10.2300/acari.20.19

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The genus Scaptognathides is newly recorded from Japan. Scaptognathides ornatus Bartsch, 1988 is found from a sandy beach in the Okinawa Islands, southern Japan. The taxonomic characters of this species are re-described on the basis of the Japanese specimens. In addition, the geographical distribution of the genus is summarized.

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A New Oribatid Mite of the Subgenus Mancoribates Hammer, 1961 (Oribatida: Haplozetidae) from Iran

Shabnam MORTAZAVI, Mohammad Ali AKRAMI, Jalil HAJIZADEH

2011 Volume 20 Issue 1 Pages 27-31
Published: May 25, 2011
Released on J-STAGE: June 25, 2011

DOIhttps://doi.org/10.2300/acari.20.27

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A new species of oribatid mite belonging to subgenus Mancoribates Hammer, 1961 of genus Indoribates Jacot, 1929 of family Haplozetidae Grandjean, 1936, Indoribates (Mancoribates) iranicus n. sp., is described from Iran.

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Biological Data

Introduction of Archoribatid Mites (Acari: Oribatida) from Shendabad Region (East Azerbaijan Province), Iran

Mostafa MIRZAIE, Karim HADDAD IRANI-NEJAD, Mohammad Ali AKRAMI

2011 Volume 20 Issue 1 Pages 33-36
Published: May 25, 2011
Released on J-STAGE: June 25, 2011

DOIhttps://doi.org/10.2300/acari.20.33

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Archoribatid mites of Shendabad Region (East Azerbaijan Province, Iran) were studied during 2008 by taking soil samples at three different times (mid-July, mid-August and mid-September). In this study, six families, 10 genera and 13 species were identified, of which seven species are new records for mite fauna of Iran. Moreover, one family and three genera are new records for province mite fauna.

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Temporal Occurrence of the Two-Spotted Spider Mite, Tetranychus urticae (Acari: Tetranychidae), on Ishigaki Island, Okinawa

Suguru OHNO, Hirosato KODAMA, Tomoko GANAHA-KIKUMURA

2011 Volume 20 Issue 1 Pages 37-40
Published: May 25, 2011
Released on J-STAGE: June 25, 2011

DOIhttps://doi.org/10.2300/acari.20.37

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Although Tetranychus urticae (green form) has never been found on the westernmost territory of Japan (the Yaeyama region of Okinawa Prefecture), we first observed the occurrence of this species from June to July, 2010, in greenhouses of fabaceous crops (kidney bean and cowpea) on one island of this region (Ishigaki Island). In October of this year, however, this species was not found in and around the greenhouses, strongly suggesting natural disappearance of this species. T. urticae can temporarily increase in the Yaeyama region, but it cannot colonize the region permanently, possibly due to some unknown biotic or abiotic factors specific to the region.

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