Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism

Spieth H, Schwarzer E (2001)
EUROPEAN JOURNAL OF ENTOMOLOGY 98(2): 171-176.

Journal Article | Published | English

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Abstract
Only in the southern part of the Iberian Peninsula the large white butterfly Pieris brassicae was recorded to pass the summer in pupal aestivation, induced by long-day photoperiods. It is not clear why this photoperiodic response is regionally restricted. We investigated whether the change of life history in P. brassicae may affect the infestation by parasites. This was done by testing the coincidence of photoperiodic responses in both the host P. brassicae and in its main parasitoid Cotesia glomerata. While the response under short-day conditions was very similar in both species, no summer dormancy of any type was found in the parasitoid at photophases greater than or equal to 15h and temperatures of 15 degrees -25 degreesC in contrast to 100% aestivation in the host. We suggest that aestivation is a response which allows the host to desynchronise its life cycle from that of its parasitoid. This is effective because parasitoid wasps cannot pass the temporary absence of suitable host stages by a similar developmental rest. C. glomerata is then forced to switch to less adequate host species which diminishes its reproductive success.
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Spieth H, Schwarzer E. Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism. EUROPEAN JOURNAL OF ENTOMOLOGY. 2001;98(2):171-176.
Spieth, H., & Schwarzer, E. (2001). Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism. EUROPEAN JOURNAL OF ENTOMOLOGY, 98(2), 171-176.
Spieth, H., and Schwarzer, E. (2001). Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism. EUROPEAN JOURNAL OF ENTOMOLOGY 98, 171-176.
Spieth, H., & Schwarzer, E., 2001. Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism. EUROPEAN JOURNAL OF ENTOMOLOGY, 98(2), p 171-176.
H. Spieth and E. Schwarzer, “Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism”, EUROPEAN JOURNAL OF ENTOMOLOGY, vol. 98, 2001, pp. 171-176.
Spieth, H., Schwarzer, E.: Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism. EUROPEAN JOURNAL OF ENTOMOLOGY. 98, 171-176 (2001).
Spieth, Hubert, and Schwarzer, E. “Aestivation in Pieris brassicae (Lepidoptera : Pieridae): Implications for parasitism”. EUROPEAN JOURNAL OF ENTOMOLOGY 98.2 (2001): 171-176.
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