Changes in Life-History Traits in the Fall Webworm within Half a Century of Introduction to Japan

Gomi, Tomoharu; Takeda, Makio

doi:10.2307/2390287

Cited by 68 publications

(58 citation statements)

References 14 publications

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“…This range of thermal constants was higher than that obtained in the present study on M. bombycis and P. nigra, less than 700 degree-days, although the host plants used differed between the studies. The present results with the host plants confirmed our previous results with Insecta LFS; that is, the developmental period, especially in the larval stage, was shortened with the shift from a bivoltine to a trivoltine life cycle (Gomi, 1996b;Gomi and Takeda, 1996).…”

Section: Discussionsupporting

confidence: 92%

“…Temperature dependence of the photoperiodic response is greater in the trivoltine population than in the bivoltine population (Gomi, 1997). The duration of the larval stage is shorter in the trivoltine population than in the bivoltine population (Gomi, 1996b;Gomi and Takeda, 1996).…”

Section: Introductionmentioning

confidence: 90%

“…The trivoltine area borders the bivoltine area at around 36°N (Gomi, 1996a(Gomi, , 1997(Gomi, , 2000. Life-history traits are different between the bivoltine and trivoltine populations (Gomi and Takeda, 1996;Gomi, 1997). The critical photoperiod for diapause induction is shorter in the trivoltine population than in the bivoltine population Takeda, 1991, 1996).…”

Section: Introductionmentioning

confidence: 99%

“…At present, the life cycle has shifted to a trivoltine one in the southwestern districts of Japan, but has remained bivoltine in the northern districts (Gomi and Takeda, 1990, 1991, 1996. The trivoltine area borders the bivoltine area at around 36°N (Gomi, 1996a(Gomi, , 1997(Gomi, , 2000.…”

Section: Introductionmentioning

confidence: 99%

“…In H. cunea, the life-history traits were investigated using only host plants in the bivoltine population during the early stage of invasion Masaki et al, 1968) and with an artificial diet only in the present bivoltine and trivoltine populations (Gomi and Takeda, 1996;Gomi, 1997;Gomi et al, 2003). It is indispensable for the management of the present population of H. cunea to clarify the life-history traits on the host plants.…”

Section: Introductionmentioning

confidence: 99%

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Effects of diet on life-history traits in a trivoltine Kobe population of Hyphantria cunea (Drury) (Lepidoptera: Arctiidae)

Gomi

Hirochika

Nagasaka

et al. 2005

Appl. Entomol. Zool.

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The effects of diet on life-history traits were compared among individual webworms reared on an artificial diet or the leaves of two host plants in a trivoltine population of Hyphantria cunea collected in Kobe, Japan. The lower threshold temperature for development and the thermal constant among one generation did not differ largely according to the diets. There were two variations in the larval instar numbers, those being the six-or seven-instar type. The incidence of the seven-instar type fed the artificial diet was significantly lower than those fed on the host plants. The pupal weight for the six-instar type was significantly heavier for those fed the artificial diet than those fed on the host plants. Seasonal host plant effects were detected in some developmental traits. The critical photoperiods for diapause induction at 20 and 25°C were similar between the host plants, and were shorter with the artificial diet than with the host plants. The present results suggest that the data for the artificial diet need not be modified in the parameters for the developmental rate, but that the critical photoperiod for diapause induction needs to be slightly lengthened when the data are applied to field insects.

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effects of diet on life-history traits in a trivoltine Kobe population of Hyphantria cunea (Drury) (Lepidoptera: Arctiidae)

Gomi

Hirochika

Nagasaka

et al. 2005

Appl. Entomol. Zool.

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The Influence of Climate Change on Insect Invasions in Temperate Forest Ecosystems

Tobin

Parry

Aukema

2013

Challenges and Opportunities for the World's Forests in the 21st Century

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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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Changes in Life-History Traits in the Fall Webworm within Half a Century of Introduction to Japan

Cited by 68 publications

References 14 publications

Effects of diet on life-history traits in a trivoltine Kobe population of Hyphantria cunea (Drury) (Lepidoptera: Arctiidae)

Effects of diet on life-history traits in a trivoltine Kobe population of Hyphantria cunea (Drury) (Lepidoptera: Arctiidae)

The Influence of Climate Change on Insect Invasions in Temperate Forest Ecosystems

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

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