Yield Losses Associated with Virus-Infected Garlic Plants During Five Successive Years

Conci, V. C.; Canavelli, Ana Elisa; Lunello, Pablo; Rienzo, Julio Di; Nomé, S. F.; Zumelzú, G.; Italia, Rusell R

doi:10.1094/pdis.2003.87.12.1411

Cited by 72 publications

(57 citation statements)

References 19 publications

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“…In the seventh field cycle, even with a severe reduction in plant height compared to the first generation plants, yields were at least 31.44% higher when compared to chronically infected plants (control) that are regularly used by the growers. Similar results were reported by Conci et al (2003) in Argentina. Virus-free garlic plants, when planted in the field, were quickly infected by viruses, affecting plant vigour and reducing the yield over successive crop cycles.…”

Section: Discussionsupporting

confidence: 91%

“…The same study indicated that cleaning garlic plants from viruses can increase yield by more than 100% when compared to the standard garlic seed used by farmers (Fajardo, 1998;Tanabe, 1999). Similar results were obtained in Argentina, where 42-100% was reinfected by the end of the first year (Conci et al, 2003). The bulb weight was an average of 75.7 g in the first crop cycle compared to 33.4 g in the virus-infected control plants, representing a gain in weight of about 125%.…”

Section: Introductionsupporting

confidence: 81%

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Viral reinfection affecting bulb production in garlic after seven years of cultivation under field conditions

et al. 2006

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Six sequential field experiments were conducted from 1999 to 2002 to evaluate virus reinfection in garlic cv. Amarante and its effect on bulb production. The treatments in the year 1999 were: T 1 -virus-free garlicseed obtained by thermotherapy and meristem-tip culture and indexed for virus by immuno-sorbent electron microscopy (ISEM) under its first field cycle; T 2 , T 3 and T 4 -garlic-seed in the second, third and fourth field cycles, respectively; and C -standard garlic-seed from the grower (with no control of virus infection) as a control. In the years 2000 to 2002, a new plot of virus-free seed was added to the experiment and cloves from the previous treatments were again grown under field conditions. In the fourth year of experiments, the treatments comprised T 1 (virus-free garlic seeds under the first field cycle) to T 7 (garlicseed in the sixth field cycle) and C. Two experiments were conducted in the years 1999 and 2000, at two locations and in the years 2001 and 2002 only one experiment per year at one location. The combined analysis of variance for all experiments indicated a significant difference between the treatments for plant height and yield. The bulbs were classified into commercial classes according the Brazilian regulation and the commercial classes 4-7 were 72 %, 60%, 59%, 53% and 35% of the total number of bulbs harvested, from T 1 to T 5 , respectively. Virus reinfection at the end of the second field cycle, determined by serology using antisera against the most common viruses of garlic in Brazil reached 83%. Treatments T 1 -T 7 yielded 118%, 79%, 57%, 51%, 39%, 33% and 31% higher than the control.

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Section: Discussionsupporting

confidence: 91%

Section: Introductionsupporting

confidence: 81%

Viral reinfection affecting bulb production in garlic after seven years of cultivation under field conditions

et al. 2006

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“…En el presente estudio, los porcentajes de muestras seropositivas variaron en los diferentes muestreos; lo anterior no significa que los virus hayan desaparecido de las plantas en el periodo transcurrido de un muestreo a otro, sino que posiblemente se haya reducido la concentración viral y, por lo tanto, la prueba de ELISA no lo detectó. Ello coincide con lo reportado por Conci, Canavelli & Lunello (2003), Dovas et al (2001) y Shiboleth, Gal-On, Koch, Rabinowitch & Salomon (2001, quienes seña-lan que aunque la técnica de ELISA a menudo ha sido utilizada para realizar el diagnóstico de virus en ajo, la técnica de PCR ha demostrado ser más eficiente y sensible.…”

Section: Discussionunclassified

Pathogenic viruses incidence, severity and detection in lettuce, in the state of Queretaro, Mexico

Moreno

Mendoza

Celedón

et al. 2016

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I S S N 0 1 8 8 -6 2 6 6Incidencia, severidad y detección de virus fitopatógenos en lechuga, en el estado de Querétaro, México RESUMENEn el presente estudio se evaluó la incidencia, severidad y frecuencia mediante la técnica de inmunoabsorción enzimática (ELISA) del luteovirus, virus del amarillamiento occidental de la remolacha (Beet western yellows virus [BWYV]), el cucumovirus, virus mosaico del pepino (Cucumber mosaic virus [CMV]), el potyvirus, virus mosaico de la lechuga (Lettuce mosaic virus [LMV]), el alfamovirus, virus mosaico de la alfalfa (Alfalfa mosaic virus [AMV]) y el tospovirus, virus de la marchitez manchada del tomate (Tomato spotted wilt virus [TSWV]). Se utilizó un diseño de bloques completamente al azar, con tres repeticiones. La comparación múltiple de medias con Tukey P ≤ 0.05. La severidad e incidencia de virosis varía en cada fecha de plantación y localidad, siendo la segunda fecha de plantación, en la localidad de Pedro Escobedo, donde se presentó la mayor severidad e incidencia de virosis; además, la frecuencia de los virus BWYV, CMV, LMV, AMV y TSWV fue de 9.8%, 23.6%, 0.9%, 2.2% y 9.3%, respectivamente. ABSTRACTThe present study evaluated incidence, severity, and viral frequency by means of ELISA of luteovirus, Beet western yellows virus (BWYV), Cucumovirus, cucumber mosaic virus (CMV), Potyvirus, lettuce mosaic virus (LMV), Alfamovirus, alfalfa mosaic virus (AMV), and tospovirus, Tomato spotted wilt virus (TSWV). Experimental randomized complete block design was used, with three replicate. Plus, a multiple comparison of means with Tukey P ≤ 0.05. Virus severity and incidence was different depending of the planting date and the locality. Second planting date, in Pedro Escobedo county, Qro., Mexico, presented the highest severity and incidence. BWYV, CMV, LMV, AMV and TSWV viruses were detected, at 9.8%, 23.6%, 0.9%, 2.2% and 9.3%, respectively.

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“…Although these infections do not kill the plants, they can cause important yield losses (Walkey & Antill, 1989;Conci, 1997;Canavelli et al, 1998;Conci et al, 2003;Lunello et al, 2007;Perotto et al, 2010). These viruses are widespread in garlic plants throughout the world due to the exclusively agamic propagation of the species.…”

Section: Introductionmentioning

confidence: 99%

Incidence of Garlic common latent virus in Argentina, and phylogenetic and recombination analyses of isolates

Torrico

Celli

Conci

et al. 2015

Pesq. agropec. bras.

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-The objective of this work was to estimate the incidence and prevalence of Garlic common latent virus (GarCLV) in the main production regions of garlic (Allium sativum) in Argentina, and to perform phylogenetic and recombination analyses in isolates from these regions. Leaf samples (3,050) were taken from four garlic commercial types, in 13 departments of the four main garlic-producing provinces of Argentina, in a 1,175-ha sampling area. Virus infection was evaluated with DAS-Elisa test using specific antiserum, and the phylogenetic and recombination analyses were done with capsid protein (CP) nucleotide sequence of seven GarCLV isolates from the provinces. The incidence of GarCLV in the evaluated provinces varied between 6.7 and 22% of the samples, whereas the prevalence varied between 52.6 and 70%. In the analysis of garlic commercial types, Morado showed the highest incidence of the virus, in the province of San Juan, whereas Rosado Paraguayo had the lowest incidence, in the province of Cordoba. Nucleotide identity in the CP sequences ranged between 80.3 and 97.6%. The phylogenetic analysis shows the presence of two main groups of GarCLV and of a possible third group that would include only a German isolate. The recombination analysis between isolates from different parts of the world evidences the presence of recombinant isolates from Poland and Australia.

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Yield Losses Associated with Virus-Infected Garlic Plants During Five Successive Years

Cited by 72 publications

References 19 publications

Viral reinfection affecting bulb production in garlic after seven years of cultivation under field conditions

Viral reinfection affecting bulb production in garlic after seven years of cultivation under field conditions

Pathogenic viruses incidence, severity and detection in lettuce, in the state of Queretaro, Mexico

Incidence of Garlic common latent virus in Argentina, and phylogenetic and recombination analyses of isolates

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