A Behavioral Study of Two Races of the Fall Webworm, Hyphantria cunea, (Lepidoptera: Arctiidae) in Louisiana

Oliver, A. D.

doi:10.1093/aesa/57.2.192

Cited by 39 publications

(36 citation statements)

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“…The taxonomic status of fall webworm is not well resolved and there may be genetically distinct "races" or forms in North America (Jaenike and Selander 1980) that are capable of interbreeding to produce fertile offspring (Masaki and Ito 1977;Oliver 1964). Morphologically, the only distinguishing feature between the two forms is larval head capsule coloration (black or red); within our study area in Colorado, we find only the red-headed form (Loewy et al 2013).…”

Section: Study Systemmentioning

confidence: 66%

“…15 m to either side of the host, parallel with the habitat edge (e.g., road or stream) and approximately 5 m wide. For each tree along the transect, we recorded the species' identity and stem diameter at breast height, excluding plants that rarely serve as fall webworm hosts [we never observed webs on trees <1.5 m in height or gymnosperms, but see Oliver (1964) and Warren and Tadić (1970)]. We collected voucher specimens for all host plants as well as any plant species that we were unable to identify in the field for later identification (host plant voucher specimens are deposited in the Kathryn Kalmbach Herbarium at the Denver Botanic Gardens).…”

Section: Host Plant Abundancementioning

confidence: 99%

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Trade-offs in host choice of an herbivorous insect based on parasitism and larval performance

Murphy

Loewy

2015

Oecologia

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Herbivore diet breadth is predicted to evolve in response to both bottom-up and top-down selective pressures, including host plant abundance, quality and natural enemy pressure. As the relative importance and strength of interactions change over an herbivore's geographic range, local patterns of host plant use should change in response, altering local diet breadths. Fall webworm (Hyphantria cunea) is a widespread, polyphagous moth species that feeds on hundreds of plant species worldwide. Populations of fall webworm in Colorado remain polyphagous, but their diet breadth is restricted compared to other populations and thus present an ideal opportunity to test the ecological drivers of host use by a polyphagous herbivore. We investigated how host abundance, larval performance, and parasitism affect host use for fall webworm to test how these selective pressures may act individually or in concert, as well as the role of any trade-offs among fitness components, to explain diet breadth and host use. We found that host abundance was a significant predictor of host use, which suggests a selective pressure to reduce search time for oviposition sites by adult females. We also detected an important trade-off between bottom-up and top-down selective pressures: higher quality host plants also had a greater proportion of larval mortality due to parasitism. Local patterns of host plant abundance appear to narrow the set of hosts used by fall webworms in Colorado, while the trade-off between host quality and risk of parasitism helps explain the maintenance of a generalized feeding strategy within this restricted set of hosts.

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Section: Study Systemmentioning

confidence: 66%

Section: Host Plant Abundancementioning

confidence: 99%

Trade-offs in host choice of an herbivorous insect based on parasitism and larval performance

Murphy

Loewy

2015

Oecologia

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“…The second is called "orange race" and the larvae have a light orange to dark brown head capsule. The two races usually occur together, although they differ in their frequency on various tree species (Oliver, 1964;Ito & Hattori, 1975). In both races the body colour of the larvae may vary considerably, showing a conspicuous polymorphism.…”

Section: Taxonomymentioning

confidence: 99%

“…In the native area, the life cycle shows geographic variation, from univoltine in southern Canada (Morris & Fulton 1970), to bivoltine in Virginia and tetravoltine in Louisiana (Oliver 1964). In Japan, a bivoltine life cycle prevailed throughout the distribution area, but trivoltine populations are recoded in the south-western areas (Masaki, 1975;Gomi, 2007).…”

Section: Life Cyclementioning

confidence: 99%

Review of forests, wood products and wood biotechnology of Iran and Germany - Part III

2009

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“…However, diapause is facultative rather than obligatory and the number of generations increases farther south to as many as three in Arkansas and four in Louisiana (Oliver 1964). cunea, a colonial nest builder found on various species of deciduous shrubs and trees, is generally considered to be univoltine in this area.…”

Section: Introductionmentioning

confidence: 99%

FACTORS INDUCING DIAPAUSE IN HYPHANTRIA CUNEA

Morris

1967

Can Entomol

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Can. Ent. 99: 522-528 (1967) Diapause induction in Hyphmtria cunea is under the joint control of photoperiod, temperature, humidity, food quality, and possibly other variables, but insufficient data are available to permit a precise evaluation of their actions and interactions. Short daylength and low temperature induce diapause and the critical thresholds for New Brunswick -Nova Scotia populations are in the vicinity of 14.3 hours and 72"F, respectively. Low humidity increases the incidence of diapause, as does also the change in the nutritional quality of foliage late in the season. Both field data and the extrapolation of laboratory data to field conditions indicate that the occurrence of a partial second generation is unlikely in this area, even in warm seasons.Abstract Can. Ent. 99: 529-536 (1967)

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A Behavioral Study of Two Races of the Fall Webworm, Hyphantria cunea, (Lepidoptera: Arctiidae) in Louisiana

Cited by 39 publications

References 0 publications

Trade-offs in host choice of an herbivorous insect based on parasitism and larval performance

Trade-offs in host choice of an herbivorous insect based on parasitism and larval performance

Review of forests, wood products and wood biotechnology of Iran and Germany - Part III

FACTORS INDUCING DIAPAUSE IN HYPHANTRIA CUNEA

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