Tomato Spotted Wilt Virus Survey Among Greenhouse Ornamentals in Pennsylvania

Hausbeck, M. K.; Welliver, R.; Derr, M. A.; Gildow, F. E.

doi:10.1094/pd-76-0795

Cited by 79 publications

(13 citation statements)

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“…The western Xower thrips (WFT), Frankliniella occidentalis Pergande, causes substantial economic losses to greenhouse crops via feeding damage and virus transmission (Hausbeck et al, 1992;Loomans et al, 1995;Murphy et al, 1998). Their ability to rapidly develop resistance to synthetic chemical insecticides (Brødsgaard, 1994;Immaraju et al, 1992;Zhao et al, 1994) has stimulated research on alternative methods of control.…”

Section: Introductionmentioning

confidence: 99%

Development of a novel bioassay for estimation of median lethal concentrations (LC50) and doses (LD50) of the entomopathogenic fungus Beauveria bassiana, against western flower thrips, Frankliniella occidentalis

Ugine

Wraight

Brownbridge

et al. 2005

Journal of Invertebrate Pathology

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Section: Introductionmentioning

confidence: 99%

Development of a novel bioassay for estimation of median lethal concentrations (LC50) and doses (LD50) of the entomopathogenic fungus Beauveria bassiana, against western flower thrips, Frankliniella occidentalis

Ugine

Wraight

Brownbridge

et al. 2005

Journal of Invertebrate Pathology

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“…However, no symptom expression was observed on these weeds, indicating a latent infection. Asymptomatic behaviour of TSWV infections has been reported for some crops (Matteoni & Allen, 1989; Feldhoff & Krczal, 1992; Hausbeck et al ., 1992). It cannot be ruled out, however, that the remaining 17 weed species are not reservoirs of the virus; a low virus titre or the growing stage of the plant may have affected the results.…”

Section: Discussionmentioning

confidence: 96%

Implications of weed composition and thrips species for the epidemiology of tomato spotted wilt in chrysanthemum (Dendranthema grandiflora)

1999

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The effects of 21 weeds acting as hosts of tomato spotted wilt virus (TSWV), temperature, thrips population and diversity on disease progress in chrysanthemum cv. Polaris were studied. Under greenhouse conditions, only Taraxacum officinale, Bidens sp., Reseda luteola and Mirabilis jalapa were hosts for TSWV. Of 38 weeds species in the area surrounding a chrysanthemum field, Tithonia tubaeformis and R. luteola had the highest populations of adult and immature thrips. These weeds, as well as M. jalapa, had an extensive seasonal distribution and may play a key role in the disease progress. Seventeen thrips species belonging to the genera Bravothrips, Thrips and Frankliniella were identified on weed flowers, with Frankliniella occidentalis (FOC) representing 9·5% of all thrips identified. Of 123 thrips collected from chrysanthemum inflorescences, 9·75% were FOC, and only 2·5% of them transmitted TSWV. Of all the thrips species collected from chrysanthemum flowers in the field, only FOC was capable of transmitting TSWV. On 120 experimental plots established at two sites, with three transplanting dates (June, July and August), it was estimated that 1·25% of the chrysanthemum cuttings were already infected with TSWV when transplanted. Secondary spread, vectored by FOC, occurred only for the earliest transplanting date and resulted in a further 2·36% disease incidence.

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“…The disease is also spreading in the coastal region of California, because lettuce from the Santa Maria Valley (Santa Barbara County) was confirmed to be infected with INSV in 2011 and 2012 (data not shown). Although INSV has previously been reported to infect lettuce grown in greenhouses in Pennsylvania (13) and in fields in Italy (45,46), the virus was not considered a major problem on lettuce. The emergence of the disease in a major lettuce-producing region such as the Salinas Valley demonstrates an important change in the impact and host range of the virus.…”

Section: Discussionmentioning

confidence: 99%

Characterization and Epidemiology of Outbreaks of Impatiens necrotic spot virus on Lettuce in Coastal California

et al. 2014

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California is the leading producer of lettuce (Lactuca sativa) for the United States and grows 77% of the country's supply. Prior to 2006, coastal California lettuce was only periodically and incidentally infected by a single tospoviruses species: Tomato spotted wilt virus (TSWV). However, beginning in 2006 and continuing through 2012, severe outbreaks of disease caused by Impatiens necrotic spot virus (INSV) have affected the coastal lettuce crop, though TSWV was also present. In contrast, TSWV was the only tospovirus associated with disease outbreaks in Central Valley lettuce during this period. Disease surveys conducted over two seasons (2008 and 2009) in 10 commercial fields (acreage of 6 to 20 ha) indicated that INSV was the only tospovirus associated with economically damaging disease outbreaks in lettuce in the coastal region, with incidences of 0.5 to 27% (mean = 5.7%). Molecular characterization of INSV isolates associated with these disease outbreaks revealed little genetic diversity and indicated that lettuce-infecting INSV isolates were nearly identical to those previously characterized from ornamental or other hosts from different locations in the United States and the world. Monitoring of thrips revealed moderate to large populations in all surveyed lettuce fields, and the majority of thrips identified from these fields were western flower thrips, Frankliniella occidentalis. There was significant positive correlation (r2 = 0.91, P = 0.003) between thrips populations and INSV incidence in the most commonly encountered type of commercial lettuce (romaine, direct seeded, conventional) included in this study. A reverse-transcription polymerase chain reaction assay developed for detection of INSV in thrips showed promise as a monitoring tool in the field. Surveys for INSV reservoir hosts in the coastal production area revealed that the weeds little mallow (Malva parvifolia) and shepherd's purse (Capsella bursa-pastoris) were commonly infected. M. parvifolia plants infected in the field did not show obvious symptoms, whereas plants of this species inoculated in the laboratory with INSV by sap transmission developed necrotic spots and chlorosis. Eleven other weed species growing in the lettuce production areas were found to be hosts of INSV. Coastal crops found to be infected with INSV included basil (Ocimum basilicum), bell pepper (Capsicum annuum), calla lily (Zantedeschia aethiopica), faba bean (Vicia faba), radicchio (Cichorium intybus), and spinach (Spinacia oleracea). Thus, it is likely that INSV was introduced into coastal California lettuce fields via viruliferous thrips that initially acquired the virus from other local susceptible plant species. Results of this study provide a better understanding of INSV epidemiology in coastal California and may help growers devise appropriate disease management strategies.

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Tomato Spotted Wilt Virus Survey Among Greenhouse Ornamentals in Pennsylvania

Cited by 79 publications

References 0 publications

Development of a novel bioassay for estimation of median lethal concentrations (LC50) and doses (LD50) of the entomopathogenic fungus Beauveria bassiana, against western flower thrips, Frankliniella occidentalis

Development of a novel bioassay for estimation of median lethal concentrations (LC50) and doses (LD50) of the entomopathogenic fungus Beauveria bassiana, against western flower thrips, Frankliniella occidentalis

Implications of weed composition and thrips species for the epidemiology of tomato spotted wilt in chrysanthemum (Dendranthema grandiflora)

Characterization and Epidemiology of Outbreaks of Impatiens necrotic spot virus on Lettuce in Coastal California

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