The population dynamics of Operophtera brumata (Lepidoptera: Geometridae)

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Thirty years ago, the debate on the role of density dependence in population dynamics formed a central theme in the Proceedings of the Fourth Symposium of the Royal Entomological Society, which was subsequently published in the book Insect Abundance, edited by T.R.E. Southwood (1968). Among the case studies included in that volume, the study on the winter moth by George Varley and George Gradwell has been central in the development of ideas relating to the importance of density dependence in population regulation. Indeed, among studies of herbivorous insect populations, those on the winter moth have had a great impact on the field, perhaps more so than those of any other insect species.