1986
DOI: 10.4039/ent118943-10
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PHENOLOGY OF THE EUROPEAN CORN BORER (OSTRINIA NUBILALIS) IN ALBERTA

Abstract: Differences in phenology were observed between two populations of Ostrinia nubilalis (Hbn.) in Alberta. In the South Saskatchewan River valley, borers pupated and emerged 3–6 days earlier than on the plains. This was not simply a function of different microclimates because median pupation occurred at 331 degree-days (DD) for plains populations and at 490 DD for valley populations. First-generation flight extended from the last week in June until the 1st week in August. Flight peaks in 1983 occurred on 8 July i… Show more

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Cited by 5 publications
(11 citation statements)
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“…However, the variation in date of moth appearance among the three fields was considerable, with a range of 12 days for the first capture and 14 days for 50% catch. Lee and Spence (1986) also reported a considerable difference in the DD required for postdiapause development and phenology at two different sites at Medicine Hat (about 100 km east of Taber). The phenology of the Alberta population of European corn borer appears to be variable, and this variation among fields reduces the usefulness of a temperature-driven model to predict key events such as peak moth abundance (Kelker et al 1990).…”
Section: Discussionmentioning
confidence: 96%
“…However, the variation in date of moth appearance among the three fields was considerable, with a range of 12 days for the first capture and 14 days for 50% catch. Lee and Spence (1986) also reported a considerable difference in the DD required for postdiapause development and phenology at two different sites at Medicine Hat (about 100 km east of Taber). The phenology of the Alberta population of European corn borer appears to be variable, and this variation among fields reduces the usefulness of a temperature-driven model to predict key events such as peak moth abundance (Kelker et al 1990).…”
Section: Discussionmentioning
confidence: 96%
“…Thus, we observed a larger partial second generation in valley populations in 1983 than we saw for plains borers (Lee and Spence 1986). Faster development of valley borers during the 5th instar leads to maturation before the arrival of the critical photoperiod, and thus to pupation.…”
Section: Temperature ("C)mentioning
confidence: 45%
“…Rate of development for post-diapause pupation was linearly related to temperature between 17 and 30°C. The value of K for post-diapause pupation of valley corn borers (272 DD, Table 1) was much less than that calculated from field data (490 DD, Lee and Spence 1986), possibly because of post-diapause feeding in the field (Lee and Spence 1986). Slopes of the regression lines were equal (P = 0.19).…”
Section: Resultsmentioning
confidence: 70%
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