Entomologia Generalis (1996) 21, 95-105

A. Gruppe (1996)
Erörterung eines Modells für die variable Dormanz bei Vorpuppen der Fichten-Gespinstblattwespe Cephalcia abietis (Hymenoptera: Symphyta: Pamphiliidae)
[Model for the importance of exogen factors influencing the variable dormancy of praepupae of Cephalcia abietis (Hymenoptera: Symphyta: Pamphiliidae)]
Entomologia Generalis 21 (1/2), 95-105
Abstract: Praepupae of the web-spinning spruce sawfly, Cephalcia abietis Linnaeus 1758, rest in dormancy in the soil for 6 months up to 5 years. The end of prediapause is indicated by the development of the complex eye. This stage needs a period of chilling for further development, i.e. for pupation. Factors responsible for annual changes of the temperature in the prepupal chamber are the following: weather, soil condition, vegetation and the behaviour of the individual larva.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: German)

Research topic(s) for pests/diseases/weeds:
population dynamics/ epidemiology
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Cephalcia abietis		Germany