Applied Entomology and Zoology
Online ISSN : 1347-605X
Print ISSN : 0003-6862
Regular Papers
Life-history traits of the Kanzawa spider mite Tetranychus kanzawai (Acari: Tetranychidae)
Tetsuo GotohKoh Gomi
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2003 Volume 38 Issue 1 Pages 7-14


Life-history traits of the Kanzawa spider mite, Tetranychus kanzawai, were assessed and compared with those of the closely related species, T. parakanzawai. This was done by determining the intrinsic rates of natural increase, rm, of three strains of T. kanzawai and one strain of T. parakanzawai, on leaf discs from each of the four host plants (collected plants) as well as one of suitable hosts for T. kanzawai, mulberry. The rm-values of the three T. kanzawai strains varied largely from 0.187/day to 0.283/day, and the rm's on the collected hosts (tea, hydrangea and Japanese pear) were 0.043–0.096/day lower than on mulberry. The rm of the T. parakanzawai strain was only 0.008/day lower on the collected plant (kudzu vine) than on mulberry. These results seem to suggest that tea, hydrangea and Japanese pear are poor-quality plants for T. kanzawai when compared to their performance on mulberry.

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© 2003 by the Japanese Society of Applied Entomology and Zoology
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