Behavior and Distribution of the Two Fall Armyworm Host Strains in Florida

Nagoshi, Rod; Meagher, Robert L.

doi:10.1653/0015-4040(2004)087[0440:badott]2.0.co;2

Cited by 106 publications

(65 citation statements)

References 33 publications

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“…Golden Queen, a commercially grown sweet corn variety that, like other sweet corn varieties, is frequently attacked by FAW in Florida (Foster, 1989;Nagoshi and Meagher, 2004). Maize seeds were planted in professional growers mix potting soil (Piedmont Pacific, GA, USA) in 4-in.…”

Section: Plantsmentioning

confidence: 99%

Attraction of Spodoptera frugiperda Larvae to Volatiles from Herbivore-Damaged Maize Seedlings

et al. 2006

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Plants respond to insect attack with the induction of volatiles that function as indirect plant defenses through the attraction of natural enemies to the herbivores. Despite the fact that volatiles are induced in response to caterpillar attack, their reciprocal effects on the host location behaviors of the same foraging herbivores are poorly understood. We examined orientation responses of sixth instar fall armyworm [FAW; Spodoptera frugiperda (Smith)] to odors from herbivore-damaged and undamaged maize seedlings (Zea mays var. Golden Queen) in y-tube olfactometer bioassays. While both damaged and undamaged maize seedlings were attractive compared with air, sixth instars preferred odors from damaged maize seedlings over odors from undamaged maize seedlings. Gas chromatography-mass spectrometry analysis of plant volatiles revealed that linalool and 4,8-dimethyl-1,3,7-nonatriene were the major volatiles induced by FAW herbivory 6 hr after initial damage. Given its prominence in induced plants and established attractiveness to adult FAW, linalool was evaluated both as an individual attractant and as a supplemental component of whole plant odors. Volatile linalool was more attractive than air to sixth instar FAW over a broad range of release rates. FAW also responded selectively to different amounts of linalool, preferring the higher amount. The orientation preferences of FAW were readily manipulated through capillary release of linalool into the airstream of whole plant odors. FAW preferred linalool over undamaged plant odors, and linalool-supplemented plant odors over unsupplemented plant odors, indicating that olfactory preferences could be changed by alteration of a single volatile component. These results suggest that although many induced volatiles attract natural enemies of herbivores, these defenses may also inadvertently recruit more larval herbivores to an attacked plant or neighboring conspecifics.

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Section: Plantsmentioning

confidence: 99%

Attraction of Spodoptera frugiperda Larvae to Volatiles from Herbivore-Damaged Maize Seedlings

et al. 2006

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“…These markers included several allozyme electrophoretic variants and DNA polymorphisms, which still remain the only reliable means of discriminating between the morphologically indistinguishable strains (Lu et al 1992, Lu and Adang 1996, McMichael and Prowell 1999, Levy et al 2002, Prowell et al 2004). Surveys of primarily U.S. populations have correlated these markers with plant hosts and have found that the "rice-strain" is preferentially found on turf grasses (e.g., Bermuda grass) and pasture grasses while the "corn-strain" is most common on corn, sorghum, and cotton (reviewed in Nagoshi and Meagher 2004b). Fall armyworm has a large host range, with 186 host plant species from 42 different families recorded to date (Casmuz et al 2010), only a small fraction of which has been linked with a host strain.…”

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Genetic Characterization of Fall Armyworm (Lepidoptera: Noctuidae) Host Strains in Argentina

Nagoshi¹,

Murúa²,

Hay-Roe³

et al. 2012

jnl. econ. entom.

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Fall armyworm is a major economic pest throughout the Western Hemisphere. Previous studies of populations in the southern United States, Brazil, and the Caribbean demonstrated the existence of two morphologically identical but genetically distinct host strains that can only be distinguished using genetic markers, including polymorphisms in the mitochondrial Cytochrome Oxidase I (COI) gene and in the Z-chromosome linked Triose phosphate isomerase (Tpi) gene. The strains differ in some physiological and behavioral characteristics, most notably their preference for different plant hosts, but are capable of hybridizing in the laboratory and in the field. These traits suggest that the strains are in the process of divergence, which may or may not be hemispheric in scope. The objective of this study was to determine whether the two strains are present in Argentina. It was found that the strain-diagnostic haplotypes of the COI and Tpi genes subdivided the Argentina population into two major groups. Each group displayed biases in their distribution among different host plants that were generally consistent with expected strain behavior. The overall results indicated that Argentina fall armyworm exhibit similar genetics and behavior to populations in the rest of the hemisphere. In addition, the Argentina populations had comparable haplotype frequencies to those from Brazil and Texas, consistent with possible interactions with these fall armyworm groups, but appeared to have had minimal exchanges with those from Puerto Rico or Florida.

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“…However, host plant use of this species is wider; the corn strain from the United States to northern South America also has been reported in sorghum and cotton, whereas the rice strain uses pasture grasses as well as rice (Prowell et al 2004, Murúa et al 2008, Vélez-Arango et al 2008. These two strains are identical morphologically but differ in their genetics at several markers at the nuclear and mitochondrial level, including esterase loci and restriction fragment length polymorphisms (Pashley 1986;Levy et al 2002;Nagoshi andMeagher 2003, 2004;Prowell et al 2004).…”

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Reproductive Isolation between Two Populations ofSpodoptera frugiperda(Lepidoptera: Noctuidae) Collected in Corn and Rice Fields from Central Colombia

Velásquez-Vélez¹,

Saldamando-Benjumea²,

Ríos-Diez

2011

Annals of the Entomological Society of America

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ABSTRAGT Spodoptera frugiperda (J.E.Smith) (Lepidoptera: Noctuidae) is a Neotropical moth that has diverged into corn. Zea mays L., and rice, Oryza sativa L., host strains because these plants are their most frequently used hosts. The corn strain also has been found in cotton, Gossypium hirsutum L., and sorghum. Sorghum bicolor (L. ) Moench, and the rice strain in small grasses and pasture grasses. Studies of the reproductive isolation between these two strains have provided ambiguous results from populations in the United States. In Golombia, we tested pre-and postzygotic isolation in these strains. Both strains showed postzygotic isolation for several life-history traits, including nutnber of egg masses, number of larvae, number of females, pupal developmental time, female and male longevity, and female and male pupal weight. We observed a reduction of the number of hybrid females and a reduction in fertility in hybrids in S. frugiperda. These results suggest tbe possibility of Haldane's lnile. Heterosis in the F^jj) and F^^) generations was observed for number of larvae and adult longevity. This line presented a high standard deviation, suggesting instability in this cross. A possible effect of the X chromosome may explain the reduction in viability and sterility in El hybrids of host strains of S. frugiperda. No temporal isolation was observed between the corn and rice strains. Differences in longevity between corn and rice strains might be another form of temporal isolation between these strains, because differences in adulthood time might reduce the encounters between them and thus hybridization.

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Behavior and Distribution of the Two Fall Armyworm Host Strains in Florida

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 106 publications

References 33 publications

Attraction of Spodoptera frugiperda Larvae to Volatiles from Herbivore-Damaged Maize Seedlings

Attraction of Spodoptera frugiperda Larvae to Volatiles from Herbivore-Damaged Maize Seedlings

Genetic Characterization of Fall Armyworm (Lepidoptera: Noctuidae) Host Strains in Argentina

Reproductive Isolation between Two Populations ofSpodoptera frugiperda(Lepidoptera: Noctuidae) Collected in Corn and Rice Fields from Central Colombia

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