A contribution to the explanation of the larch bud moth cycle, the polymorphic fitness hypothesis

@article{Baltensweiler2004ACT,
  title={A contribution to the explanation of the larch bud moth cycle, the polymorphic fitness hypothesis},
  author={Werner Baltensweiler},
  journal={Oecologia},
  year={2004},
  volume={93},
  pages={251-255}
}
Studies of fluctuating insect populations generally discuss the regulating processes at high insect numbers, but very rarely why a cycling population at low densities switches immediately from the declining phase to the increasing phase of the cycle. A long-term study of the larch bud moth (Zeiraphera diniana Gn) has suggested that the key to recovery is assortative mating of specific phenotypes. Z. diniana exhibits distinct host races living either on the deciduous larch or evergreen pines and… 
Larch- and pine-feeding host races of the larch bud moth {Zeiraphera diniana) have cyclic and synchronous population fluctuations
TLDR
The results did not allow any explanation for cyclic fluctuations of LBM on pine, but the synchrony with the larch race's cycle suggests that studies on genetics as well as on parasitism should be intensified.
HOST-INDUCED ASSORTATIVE MATING IN HOST RACES OF THE LARCH BUDMOTH
The likelihood of sympatric speciation is enhanced when assortative mating is a by-product of adaptation to different habitats. Pleiotropy of this kind is recognized as important in parasites that
Antennal Responses of the Two Host Races of the Larch Bud Moth, Zeiraphera diniana, to Larch and Cembran Pine Volatiles
TLDR
The fact that LBM individuals with intermediate characteristics between the two host races exist, suggests that olfactory perception does not hinder gene flow and contributes to sustained genetic diversity within the species Z. diniana.
Host races in plant-feeding insects and their importance in sympatric speciation.
  • M. Drès, J. Mallet
  • Biology, Medicine
    Philosophical transactions of the Royal Society of London. Series B, Biological sciences
  • 2002
TLDR
This work provides verifiable criteria to distinguish host races from other biotypes, and discusses applications of an understanding of host races in conservation and in managing adaptation by pests to control strategies, including those involving biological control or transgenic parasite-resistant plants.
Genomic evidence for divergence with gene flow in host races of the larch budmoth
TLDR
It is concluded that the variance of the level of sympatric divergence among chromosomes is the footprint of divergent selection acting on a few linkage groups, combined with appreciable gene flow that homogenizes between‐race variation at the remaining linkage groups.
ÉCOLOGIE ÉVOLUTIVE DES POPULATIONS D'ARPENTEUSE DE LA PRUCHE
Inter-populations differences are rarely considered in the management of insect defoliators. Insect management is usually based on models produced from a single population reared in laboratory and
Tree-ring evidence for the historical absence of cyclic larch budmoth outbreaks in the Tatra Mountains
Key messageThe absence of larch budmoth outbreaks and subsequentconsequences on tree rings together with a distinct climate–growth relationship enhance the dendroclimatic potential of larch ring
Three centuries of insect outbreaks across the
Summary • Knowledge of the persistence of regular larch budmoth outbreaks is limited in space and time. Although dendrochronological methods have been used to reconstruct insect outbreaks, their
Effects of host abundance on larch budmoth outbreaks in the European Alps
TLDR
The results obtained in the present study suggest that, in addition to the climatic conditions, host‐species abundance is critically important for the occurrence of periodic LBM outbreaks and the determination of the respective outbreak range.
1200 years of regular outbreaks in alpine insects
The long-term history of Zeiraphera diniana Gn. (the larch budmoth, LBM) outbreaks was reconstructed from tree rings of host subalpine larch in the European Alps. This record was derived from 47 513
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