Behaviour of late‐instar gypsy moth larvae in high and low density populations

@article{Lance1987BehaviourOL,
  title={Behaviour of late‐instar gypsy moth larvae in high and low density populations},
  author={David R. Lance and Joseph S Elkinton and Charles P. Schwalbe},
  journal={Ecological Entomology},
  year={1987},
  volume={12}
}
ABSTRACT. 1. Using scaffolding and night‐vision equipment, we observed fifth and sixth instars of the gypsy moth, Lymantria dispar (L.), on Quercus velutina Lam. in the field. 
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The effects of defoliation resulted in reduced pupal weights, longer development time, and reduced survival in gypsy moth reared on undefoliated and artificially defoliated gray birch and black oak. Expand
Oak Leaf Quality Declines in Response to Defoliation by Gypsy Moth Larvae
Leaves of red oak trees that had been defoliated by gypsy moth larvae during the previous year and again during the period of the study had higher values of tanning coefficients, total phenolics,Expand
Feeding Rhythms of Gypsy Moth Larvae: Effect of Food Quality During Outbreaks
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The well—documented but poorly understood shift in feeding rhythms has been viewed as an adaptation to enhance survival during outbreaks; it now appears to be mediated by defoliation—induced changes in leaf quality. Expand
Some Effects of Gypsy Moth Density on Rate of Development, Pupation Time, and Fecundity
In the gypsy moth, Lymantria dispar (L.), subpopulations studied in an overall outbreak area near Glenville, N. Y., the rate of larval development and the time of pupation were directly related toExpand
Components of Density-related Stress as Potential Determinants of Population Quality in the Gypsy Moth (Lepidoptera: Lymantriidae)
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The hypothesis that density-related variation in gypsy moths results primarily from changes in food quality and microhabitat is supported. Expand
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The feeding rhythm of larvae of Porthetria dispar (L.) was determined from field observations, with feeding initiated in the evening and reaching a peak at sunset, with some feeding observed throughout the day. Expand
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TLDR
The gypsy moth is expanding its range rapidly in the US and is found westward throughout much of New York and Pennsylvania, with isolated popula­ tions in Michigan and Ohio, and southward into Delaware and Maryland, and this accelerated spread is due in part to a large outbreak in many areas of the northeast US. Expand
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Mandibular Gland Secretion of Larvae of the Flour Moth, Anagasta kuehniella, contains an Epideictic Pheromone and elicits Oviposition Movements in a Hymenopteran Parasite
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It is suggested that last-instar larvae of A. kuehniella, when they meet, deposit on the substratum drops of secretion from their mandibular glands, and that the response of other last- instar larvae to this secretion results not only in the regulation of the total numbers of A., but also in the control of the dispersion of individuals within that system. Expand
Two Techniques for Monitoring Feeding of Large Larval Lepidoptera, with Notes on Feeding Rhythms of Late-instar Gypsy Moths (Lepidoptera: Lymantriidae)
TLDR
An inexpensive, totally mechanical device was used for monitoring feeding of late-instar larvae of the gypsy moth, Lymantria dispar (L.), and rhythmicity of feeding was reduced but detectable throughout a 3-day test. Expand
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