2012
DOI: 10.4039/tce.2012.81
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A method for induction and quantification of diapause entry in the swede midge (Diptera: Cecidomyiidae)

Abstract: Induction of diapause under laboratory conditions is a valuable tool for the study of dormancy in economic pests such as the swede midge, Contarinia nasturtii Kieffer (Diptera: Cecidomyiidae). In the present study, diapause in larval swede midge was achieved via manipulation of rearing photoperiod and temperature. Frequency of diapause was assessed by sieve separation of diapause cocoons from pre-sifted peat substrate following emergence of pupating individuals. Mean diapause frequency for swede midge larvae r… Show more

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Cited by 9 publications
(9 citation statements)
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“…Diapause incidence under cool, short days was 30% higher than expected based on our previous laboratory study (Des Marteaux et al 2012). This discrepancy may have been at least partly attributed to a 1°C cooler rearing temperature in the present study.…”
Section: Rearingcontrasting
confidence: 89%
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“…Diapause incidence under cool, short days was 30% higher than expected based on our previous laboratory study (Des Marteaux et al 2012). This discrepancy may have been at least partly attributed to a 1°C cooler rearing temperature in the present study.…”
Section: Rearingcontrasting
confidence: 89%
“…Rearing under cool, short days resulted in 86% of the total larval population entering diapause. This diapause incidence was nearly twofold greater than expected based on our previous study (Des Marteaux et al 2012). The frequency of diapause was neither affected by the date of egg laying (adjusted F 1,14 = 1.26, P = 0.28; Supplementary Table S1) nor family size (F 1,14 = 0.22, P = 0.65).…”
Section: Resultscontrasting
confidence: 44%
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“…Earlier transplanting of broccoli into the field may have yielded a greater number of third‐instar larvae and at earlier dates, although the first and last collection dates in 2010 captured almost a complete span of diapause frequencies (from < 5% to 100%). Because swede midge cocoons were present in tilled soil used to fill cages initially, we recommend that any swede midge cocoons are removed from the soil in future studies to prevent inadvertent sampling of individuals that entered diapause in previous years (for swede midge cocoon filtration technique, see Des Marteaux et al , ). The use of plastic sticky traps is also recommended for durability in similar future studies, and traps with thick glue layers are especially recommended to preserve morphological features that are important for identification of delicate insects, such as swede midges.…”
Section: Discussionmentioning
confidence: 99%