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Diapause and Photoperiodism in the Fruit Tree Red Spider Mite (Metatetranychus ulmi Koch)

Abstract

STUDIES by Dickson1,2 on the oriental fruit moth (Grapholitha molesta) and by Way, Hopkins and Smith3 on the tomato moth (Diataraxia oleracea) and other Lepidoptera have directed attention recently to the significance of light (day-length) in controlling the onset of diapause. Some earlier work on insects had already suggested that other events in the developmental cycle, such as the resumption of growth in certain tree-hole mosquitoes4 and the appearance of sexual forms in aphids5–7, were also determined by the duration of light. Nevertheless, a photo-periodic response of this nature, serving to adjust the life-cycle to the seasons, may perhaps be of wider occurrence in arthropods than has been generally appreciated.

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References

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LEES, A. Diapause and Photoperiodism in the Fruit Tree Red Spider Mite (Metatetranychus ulmi Koch). Nature 166, 874–875 (1950). https://doi.org/10.1038/166874a0

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