Insect photoperiodism: various ways of regulating univoltinism in lacewings (Planipennia: Chrysopidae) |
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| Authors: | M Canard A Grimal |
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| Institution: | (1) Laboratoire d'Entomologie, Université Paul-Sabatier, 118 route de Narbonne, F-31062 Toulouse Cedex, France |
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| Abstract: | Summary Reproduction inTjederina gracilis adults depends on short-day followed by long-day conditions. InNineta pallida, development of overwintering first-instar larvae is retarded by short days; later on, that of second-and third-instar by long days.Nineta flava andChrysopa perla prepupae automatically enter diapause, but inN. flava, photoperiod regulates diapause eermination, and long days may retard egg laying |
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| Keywords: | Photoperiodism dormancy diapause voltinism overwintering seasonal adaptation Neuroptera Chrysopidae |
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