Canadian Forest Service Publications

Temperature and photoperiod effects on the immature stages and adults of Neodiprion swainei (Hymenoptera : Diprionidae) 1971. Philogène, B.J.R.; Benjamin, D.M. Can. Ent. 103: 1705-1715.

Year: 1971

Issued by: Laurentian Forestry Centre

Catalog ID: 15730

Language: English

Availability: PDF (request by e-mail)

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Larvae of Neodiprion swainei Midd. were reared to the adult stage under controlled conditions of temperature and photoperiod. The effects of temperature are particularly evident during the larval stage, cocoon spinning, and adult emergence and are also observed through variation in cocoon weight and fecundity. Feeding, fecundity, and diapause are directly related to photoperiod. Larvae eat more when the photophase is long, an effect that is detrimental to the organism because there is a parallel loss of energy expressed in the number of day-degrees required to complete development.