Desiccation tolerance in diapausing spider mites Tetranychus urticae and T. kanzawai (Acari: Tetranychidae)

We investigated the effects of changes in vapor pressure deficit (VPD) on the survival of diapausing (winter form) and non-diapausing (summer form) spider mites Tetranychus urticae Koch and Tetranychus kanzawai Kishida (Acari: Tetranychidae). Adult females of both species were kept without food at V...

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Bibliographic Details
Published in:Experimental & applied acarology 2014-05, Vol.63 (1), p.49-55
Main Authors: Ghazy, Noureldin Abuelfadl, Suzuki, Takeshi
Format: Article
Language:English
Subjects:
Acari
Animal Ecology
Animal Genetics and Genomics
Animal Systematics/Taxonomy/Biogeography
Animals
Araneae
Biomedical and Life Sciences
Desiccation
Entomology
Female
Life Sciences
Mites
Population Dynamics
Starvation
Tetranychidae
Tetranychidae - physiology
Tetranychus kanzawai
Tetranychus urticae
Vapor pressure
Water - metabolism
Winter
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Summary:We investigated the effects of changes in vapor pressure deficit (VPD) on the survival of diapausing (winter form) and non-diapausing (summer form) spider mites Tetranychus urticae Koch and Tetranychus kanzawai Kishida (Acari: Tetranychidae). Adult females of both species were kept without food at VPDs of 0.0, 0.4, 0.7, 1.5, 1.9, or 2.7 kPa for 3, 6, 9, 12, or 15 days at 25 °C. Diapausing females of both species kept at a VPD of ≥0.4 kPa for ≥6 days clearly tolerated desiccation. Under water-saturated conditions (VPD = 0.0 kPa), in which no desiccation occurred, diapausing females showed high starvation tolerance: 90 % survived for up to 15 days. No interspecific differences in tolerance to desiccation or starvation were observed under most conditions. These results indicate that diapause functions increase tolerance to desiccation and starvation. Such multiple tolerances to harsh environments might support winter survival in spider mites.
ISSN:0168-8162
1572-9702
DOI:10.1007/s10493-013-9760-0