Journal of the Acarological Society of Japan
Online ISSN : 1880-2273
Print ISSN : 0918-1067
ISSN-L : 0918-1067
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Volume 11, Issue 1
Displaying 1-5 of 5 articles from this issue
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Original Papers
  • Population Growth of Tomato Russet Mite, Aculops lycopersici (Acari: Eriophyidae) and Its Injury Effect on the Growth of Tomato Plants
    Mohd. Mainul HAQUE, Akira KAWAI
    2002 Volume 11 Issue 1 Pages 1-10
    Published: 2002
    Released on J-STAGE: August 24, 2005
    DOIhttps://doi.org/10.2300/acari.11.1
    JOURNAL FREE ACCESS
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    The population growth of the tomato russet mite, Aculops lycopersici (Massee), and its effect on tomato plants were studied in glasshouses. The population increased exponentially for six weeks after infestation. The intrinsic rate of natural increase was estimated to be 0.175 per day. At seven weeks after infestation, the predator, Homeopronematus anconai (Baker) (Acari: Tydeidae), appeared on several plants. The population of A. lycopersici decreased rapidly on plants where the predator appeared, due to predation. But it decreased gradually on plants where the predator did not appear, because of the damage to the host plant caused by the mites. More than 70% of the population infested the leaves. A. lycopersici first reproduced on the released leaves then moved upward. The infestation caused great injury to the plants, with a large number of leaves turning brown and then drying up. The number of leaves, the plant height and the diameter of the main stem of the plants all decreased.
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  • A New Species of Insculptoppia Mite (Acari: Oribatida: Oppiidae) from a Cave in the Southwestern U.S.A.
    Norihide OHKUBO, James C. COKENDOLPHER
    2002 Volume 11 Issue 1 Pages 11-16
    Published: 2002
    Released on J-STAGE: August 24, 2005
    DOIhttps://doi.org/10.2300/acari.11.11
    JOURNAL FREE ACCESS
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    A new oribatid species, Insculptoppia cavernalis spec. nov., is described from a cave in the southwestern USA. The new species is considered a troglobite. Two specimens of 'Rasmusella n.sp. (spp.?)' in the list of fossil mites from Hidden Cave (Table 1 in Polyak et al., 2001) were also identified to be this species.
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  • Chemical Ecology of Astigmatid Mites LXVII. Neral [3,7-dimethyl-(Z)-2,6-octadienal]: The Female Sex Pheromone of an Acarid mite, Histiogaster sp. (Acari: Acaridae)
    Hiroyuki HIRAOKA, Naoki MORI, Kimiko OKABE, Ritsuo NISHIDA, Yasumasa K ...
    2002 Volume 11 Issue 1 Pages 17-26
    Published: 2002
    Released on J-STAGE: August 24, 2005
    DOIhttps://doi.org/10.2300/acari.11.17
    JOURNAL FREE ACCESS
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    Neral [3,7-dimethyl-(Z)-2,6-octadienal] was identified to be the female sex pheromone of the mite Histiogaster sp. (Acari: Acaridae). The species originated from a fungal Trichoderma harzianum culture in Japan. The compound aroused males to mount females. Although the compound was detected in both sexes (29.4±8.9 ng in females and 5.7±1.9 ng in males), the behavior observation suggested that males could distinguish females from males. Synthetic neral indicated the activity at 0.1–1 ng doses. On the other hand, geranial [3,7-dimethyl-(E)-2,6-octadienal, the geometrical isomer of neral at the 2-C position], did not sexually stimulate males. Males could, therefore, discriminate between neral and geranial. Escaping behavior was observed upon exposure of neral at 100 ng and of geranial at 10–100 ng doses.
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  • A New Genus and Species of Pygmephoridae (Acari: Heterostigmata) Associated with Onthophagus (Coleoptera: Scarabaeidae) in Japan
    Kazuyoshi KUROSA
    2002 Volume 11 Issue 1 Pages 27-36
    Published: 2002
    Released on J-STAGE: August 24, 2005
    DOIhttps://doi.org/10.2300/acari.11.27
    JOURNAL FREE ACCESS
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    A new genus and species of pygmephorid mite belonging to the subfamily Neopygmephorinae is described from Japan under the name of Heteropygmephorus onthophagi. It is known only from the adult female and found attached to the cervical membrane between head and prothorax or dorsolateral depression of occiput of dung beetles of the genus Onthophagus (Coleoptera: Scarabaeidae) occurring in Japan. The new genus is closely related to Aegiptophorus Sevastianov and Abo-Korah, 1984, in possessing a large cylindroconical pinnaculum provided with 1 elongate solenidion and 4 long eupathidia, on the apex of tibiotarsus I, and the shape of apodeme 2 and secondary transverse apodeme, but the pinnaculum is not so huge as in the latter genus, no incision is present on postaxial margin of tibiotarsus I, and seta u' of the same segment is short and spine-like.
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Short Communication
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