First Report of <i>Fusarium oxysporum</i> f. sp. <i>lactucae</i> Causing Vascular Wilt of Lettuce in Florida

Murray, J. J.; Raid, Richard N.; Miller, Christian F.; Sandoya, Germán V.

doi:10.1094/pdis-12-19-2625-pdn

Cited by 7 publications

(5 citation statements)

References 4 publications

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“…Initial screening of Florida-adapted germplasm Fusarium wilt of lettuce was first detected in Florida in 2017 and has been confirmed as race 1 within a small, localized region (Murray et al, 2020). The pathogen has persisted in initial fields, and newer detections have occurred in surrounding plots when planted with Fol susceptible cultivars.…”

Section: Resultsmentioning

confidence: 99%

“…Emerging seedlings were thinned to one plant per cell, watered daily, and fertilized weekly for 30 d before inoculation. Plants were inoculated with the monoconidic EAA isolate Fol #51 previously verified for high virulence (Murray et al, 2020).…”

Section: Seedling Preparation and Inoculation Protocol For Greenhouse Experimentsmentioning

confidence: 99%

“…Florida is the third largest lettuce producing state in the United States, and Fol symptoms were first detected in its primary lettuce producing region of the Everglades Agricultural Area (EAA) in 2017 (Murray et al, 2020). Although the pathogen has been confined to a localized region within the EAA, it has the potential to spread to nearby fields through contaminated equipment and will likely remain problematic for years to come, as has occurred in other lettuce production areas (Gordon and Koike, 2015).…”

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confidence: 99%

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Genetic Resistance of Lactuca spp. against Fusarium oxysporum f. sp. lactucae Race 1

Murray

Hisamutdinova

Sandoya

et al. 2021

horts

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Fusarium wilt of lettuce is caused by the pathogen Fusarium oxysporum f. sp. lactucae (Fol) and is a growing threat to global lettuce production. Fol was first detected in Florida in 2017 and was subsequently confirmed as race 1. Management strategies for this long-persisting soil pathogen are limited, time-consuming and expensive, and they may lack efficacy. Identifying diverse sources of genetic resistance is imperative for breeding adapted cultivars with durable resistance. The objectives of this study were to identify sources of resistance against a race 1 isolate of Fol in Florida, delineate the relationship between foliar and taproot symptoms, and investigate the inheritance of resistance and partial resistance in two F2 populations. Thirteen experiments were conducted in greenhouse and field locations to characterize the diversity of genetic resistance in the genus Lactuca. Leaf cultivars Dark Lollo Rossa and Galactic; romaine breeding lines 43007, 60182, and C1145; and iceberg breeding line 47083 consistently exhibited low foliar and taproot disease symptoms. Resistance was not identified among the wildtype Lactuca or primitive plant introductions (PI) in this study based on taproot symptoms. An additional test was conducted to study the segregation pattern of Fol resistance between one resistant and one susceptible accession (R × S) and one partial resistant and one susceptible accession (PR × S). The F2 population from ‘60182 × PI 358001-1’ fit the expected segregation ratio for a single recessive locus model, whereas the ratio for ‘Dark Lollo Rossa × PI 358001-1’ did not fit either recessive or dominant single locus models. These sources of resistance are potential candidates for developing commercial cultivars with multiple resistance loci against Fol race 1, especially for the Florida lettuce production system.

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Section: Resultsmentioning

confidence: 99%

Section: Seedling Preparation and Inoculation Protocol For Greenhouse Experimentsmentioning

confidence: 99%

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confidence: 99%

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Genetic Resistance of Lactuca spp. against Fusarium oxysporum f. sp. lactucae Race 1

Murray

Hisamutdinova

Sandoya

et al. 2021

horts

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“…lactucae. The pathogen in the EAA was confirmed as Race 1 with molecular techniques (Murray et al 2020). However, it remains unknown as to how the disease spread to the EAA, where 10,000 acres of lettuce are annually produced by south Florida farmers from October through May.…”

Section: The Recent Discovery Of the Disease In Floridamentioning

confidence: 99%

Fusarium Wilt: A New Threat to Florida Lettuce Production

Sandoya¹,

Murray²,

Raid³

et al. 2020

EDIS

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Fusarium wilt of lettuce is a disease caused by the fungus Fusarium oxysporum f.sp. lactucae. The disease is present in all lettuce production areas worldwide. Recently this disease has been identified in Florida in localized fields. This new 4-page publication of the UF/IFAS Horticultural Sciences Department presents information about the disease, symptoms, and control measures useful to lettuce growers in Florida. Following these recommendations may help to avoid the spread of this fungus in muck soils at the Everglades Agricultural Area (EAA), where 90% of the lettuce in Florida is planted. Written by Germán V. Sandoya, Jesse J. Murray, Richard N. Raid, and Christian F. Miller.https://edis.ifas.ufl.edu/hs1385

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“…lactucae (Matuo and Motohashi,1967) is considered the most important soil-borne pathogen of lettuce (Farr and Rossman, 2020;Matheron and Gullino, 2012). The disease was first identified in Japan in 1955 (Matuo and Motohashi, 1967) and after in California (USA) (Hubbard and Gerik, 1993), Taiwan (Li et al, 2014), Iran (Millani et al, 1999), Italy (Garibaldi et al, 2002), Brazil (Ventura and Costa, 2008;Cabral et al, 2014), Argentina (Malbrán et al, 2014), Belgium (Claerbout et al, 2018), the Netherlands (Gilardi et al, 2017a), France (Gilardi et al, 2017b), Egypt (El-Sayed et al, 2018), England, Ireland (Taylor et al, 2019), Florida (Murray et al, 2020) and Norway in 2021 (Herrero et al, 2021). The disease causes leaf yellowing and wilting of developed plants, vascular obstruction, and, finally, plant death.…”

Section: Introductionmentioning

confidence: 99%

Pathogenicity of Fusarium oxysporum f. sp. lactucae in lettuce cultivars at different temperatures

Guerrero,

Martínez,

Martínez

et al. 2024

Sci. agric. (Piracicaba, Braz.)

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Fusarium wilt caused by Fusarium oxysporum f. sp. lactucae Race 1 was first detected in lettuce in the Region of Murcia (Spain) in 2017, in plantations in the northwestern area, where the crop is grown in the summer. In order to establish control strategies against the disease, studies have been carried out under controlled conditions with influence of temperature (25 °C and 28 °C), aggressiveness of isolates (four isolates from Race 1), and behavior of commercial cultivars (three susceptible cultivars and four not susceptible). In our study, all susceptible cultivars died at both temperatures for all the isolates, while the temperature of 25 °C was lethal for only one plant of a non-susceptible cultivar. The plants of non-susceptible cultivars that did not die presented index symptoms within a range from 1.7 to 3.7 according to cultivars and isolates; however, at 28 °C, all plants of the non-susceptible cultivars were infected, with 30 % to 100 % of plants dead.The results suggest that temperature affects the disease and that, in highly contaminated areas where the lettuce crop is grown in hot periods, management of the disease requires strategies complementary to using non-susceptible or resistant cultivars.

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First Report of Fusarium oxysporum f. sp. lactucae Causing Vascular Wilt of Lettuce in Florida

Cited by 7 publications

References 4 publications

Genetic Resistance of Lactuca spp. against Fusarium oxysporum f. sp. lactucae Race 1

Genetic Resistance of Lactuca spp. against Fusarium oxysporum f. sp. lactucae Race 1

Fusarium Wilt: A New Threat to Florida Lettuce Production

Pathogenicity of Fusarium oxysporum f. sp. lactucae in lettuce cultivars at different temperatures

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