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The winter development, reproduction and lifespan of viviparae of Sitobion avenae (F.) (Hemiptera: Aphididae) on wheat in England

By: Contributor(s): Material type: ArticleArticleLanguage: En Publication details: 1987Subject(s): In: Bulletin of Entomological Research v. 77, no. 1, p. 19-34617557Summary: Viviparae of Sitobion avenae in clip-cages on winter wheat in field plots insouthern England were monitored throughout the 1980-81 winter to determine characteristics of development, reproduction and lifespan under winter conditions. Rate-temperature relationships for development and reproduction werewell described by straight lines when temperatures were measured above 3øC. A simple thermal-time scale could therefore be used for both processes. The parental morph and the time of year modified thermal-time requirements for the production of an adult's first 20 nymphs but did not affect those for development. For both alatae and apterae, nymph production per
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Tables, graphs, references p. 33-34

Viviparae of Sitobion avenae in clip-cages on winter wheat in field plots insouthern England were monitored throughout the 1980-81 winter to determine characteristics of development, reproduction and lifespan under winter conditions. Rate-temperature relationships for development and reproduction werewell described by straight lines when temperatures were measured above 3øC. A simple thermal-time scale could therefore be used for both processes. The parental morph and the time of year modified thermal-time requirements for the production of an adult's first 20 nymphs but did not affect those for development. For both alatae and apterae, nymph production per

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