MIGRATION FLIGHT BY AN APHID, <i>RHOPALOSIPHUM MAIDIS</i> (HEMIPTERA: APHIDIDAE), AND A NOCTUID, <i>SPODOPTERA FRUGIPERDA</i> (LEPIDOPTERA: NOCTUIDAE)

Rose, Armin; Silversides, R. H.; Lindquist, O. H.

doi:10.4039/ent107567-6

Cited by 112 publications

(65 citation statements)

References 13 publications

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“…Fields and McNeil (1984) reported that the true armyworm cannot overwinter in Canada (a finding confirmed in 2015 field trials: Doward & McNeil, unpublished) and postulated that the populations observed in Canada each year are derived from immigrants. In contrast, autumn immigrants arriving in Ontario enter unsuitable overwintering habitat and clearly would not survive, as previously reported for the fall armyworm (Rose et al, 1975;Mitchell et al, 1991). McNeil (1987) also postulated that the true armyworm undertakes a southward autumn migration, and the early autumn isotope data we report for individuals captured in Texas in September 2012 provided the first concrete evidence that this is the case.…”

Section: Stable Carbon and Nitrogen Isotopessupporting

confidence: 79%

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Hobson

Doward

Kardynal

et al. 2018

Ecological Entomology

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1. Many important insect pests undertake seasonal migrations at continental scales in response to changes in resource quality and availability. The frequency and timing of these events could be influenced by the impact of climate change on the suitability of the different sites exploited throughout the year, yet, in many cases, little is known about the origin of seasonal populations, as tracking insect movements is extremely challenging due to their small body size.2. The use of stable isotope measurements in insect tissues combined with the development of tissue-specific 'isoscapes' of modelled geographic isotope patterns presents a potentially valuable but rarely used approach for obtaining such information on important pest species. In this paper it is illustrated how stable hydrogen isotope analyses ( 2 H) in wing chitin of the true armyworm (Mythimna (Psuedaletia) unipuncta Haworth), a seasonal migrant, clearly delineated between 2016 spring immigrants and later locally produced moths in southern Ontario, Canada.3. It is shown that adult moths captured in early fall in Texas were immigrants from farther north, the first direct confirmation of a southward return migration of this species. Stable carbon isotope ( 13 C) measurements indicated that spring immigrants in Ontario and autumn immigrants in Texas were from exclusively C3 biomes. Stable nitrogen isotope ( 15 N) measurements also provided information on the probability of individuals coming from agriculturally intensive (i.e. higher 15 N) sites. Finally, several recommendations are provided regarding future research that could improve the Bayesian assignment models and thus improve assignment accuracy.

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Section: Stable Carbon and Nitrogen Isotopessupporting

confidence: 79%

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Hobson

Doward

Kardynal

et al. 2018

Ecological Entomology

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“…There may also be a northwesterly movement from southern Florida that contributes to the infestation in the Mississippi Valley (Pair et al 1986). These descriptions are generally consistent with movements expected from average synoptic meteorological conditions (Rose et al 1975, Mitchell et al 1991) and the geographical distribution of subpopulations that differed with respect to disease or pesticide resistance (Young 1979, Fuxa 1987, Pitre 1988.…”

supporting

confidence: 75%

Texas Is the Overwintering Source of Fall Armyworm in Central Pennsylvania: Implications for Migration Into the Northeastern United States

Nagoshi¹,

Fleischer²,

Meagher³

2009

Environ Entomol

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Fall armyworm, Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), infestations in most of North America arise from annual migrations of populations that overwinter in southern Texas and Florida. Cytochrome oxidase I haplotype profiles within the fall armyworm corn strain, the subgroup that preferentially infests corn (Zea mays L.), can differentiate the Texas and Florida populations. We use this molecular metric to show that fall armyworms in central Pennsylvania originate from Texas, indicating the existence of a migratory pathway from Texas to the northeastern United States. These results were compared with historical trapping data for fall armyworm and another migratory noctuid, corn earworm Helicoverpa zea (Boddie) (Lepidoptera: Noctuidae), in the Pennsylvania and Maryland corn-producing areas to better define lepidopteran migratory pathways.

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“…Given that individuals were collected at different sites one cannot rule out the possibility of geographic race differences, as reported for the turnip moth Agrotis segetum (Löfstedt et al 1986) and Heliothis subflexa (Heath et al 1991), given that Ramaswamy et al (1988) did find some differences in the diel periodicity of calling and pheromone production in two different geographic populations of the corn strain. However, it seems somewhat unlikely that all differences relate to specific geographic populations, given that (i) S. frugiperda is a long distance migrant throughout much of Central and North America (Rose et al 1975;Sparks et al 1986;Mitchell et al 1991) and (ii) in the previous studies examining the chemical composition of fall armyworm sex pheromone one has no idea whether the females were pure corn or rice strains, or mixtures of the two. Therefore, the existence of different pheromone communication channels in the two races, as suggested for two sympatric types of the fall webworm (McLellan et al 1991), could also contribute to the apparently conflicting results on the composition of the sex pheromone.…”

Section: Introductionmentioning

confidence: 99%

Female sex pheromones in the host races and hybrids of the fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

Lima

McNeil

2009

Chemoecology

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The three major pheromone components found in gland extracts of both rice and corn strain Spodoptera frugiperda virgin females were Z9-14:Ac, Z11-16:Ac and Z7-12:Ac, However, both the concentrations and relative proportions of the compounds varied significantly between strains as a function of female age and the time during the scotophase that the glands were extracted. The concentration of Z9-14:Ac found in the glands of hybrid females, coming from corn 9 rice and rice 9 corn crosses differed significantly, but in both cases did not differ significantly from that of maternal line females. The results suggest that synthesis is controlled, at least in part, by the W chromosome. Given the intraspecific variability reported in other species of Lepidoptera, both with respect to female pheromone production and male responsiveness, it would appear rather unlikely that these differences alone would be sufficient to ensure reproductive isolation of the two strains.

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MIGRATION FLIGHT BY AN APHID, RHOPALOSIPHUM MAIDIS (HEMIPTERA: APHIDIDAE), AND A NOCTUID, SPODOPTERA FRUGIPERDA (LEPIDOPTERA: NOCTUIDAE)

Cited by 112 publications

References 13 publications

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Inferring origins of migrating insects using isoscapes: a case study using the true armyworm, Mythimna unipuncta, in North America

Texas Is the Overwintering Source of Fall Armyworm in Central Pennsylvania: Implications for Migration Into the Northeastern United States

Female sex pheromones in the host races and hybrids of the fall armyworm, Spodoptera frugiperda (Lepidoptera: Noctuidae)

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