scholarly journals Transmission of Citrus Tristeza Virus (CTV) from “Declinamiento”-Diseased Sweet Orange Tree on Trifoliate Orange and its Epidemiology to the Flight Activity of the Vector, Toxoptera Citricida Kirkc (Homoptera: Aphididae) in Misioness, Argentina

1984 ◽  
Vol 9 (9) ◽  
Author(s):  
O. Nickel ◽  
F. Klingauf ◽  
H. Fischer
Keyword(s):  
Citrus Tristeza Virus ◽  
Sweet Orange ◽  
Flight Activity ◽  
Trifoliate Orange ◽  
Orange Tree ◽  
Toxoptera Citricida ◽  
Tristeza Virus ◽  
Citrus Tristeza

scholarly journals Separation of Citrus Tristeza Virus Isolates in Mixed Infections through Transfer by Single Brown Citrus Aphids

HortScience ◽  
2005 ◽  
Vol 40 (3) ◽  
pp. 694-696 ◽  
Author(s):  
Charles A. Powell ◽  
Youjian Lin
Keyword(s):  
Citrus Tristeza Virus ◽  
Sweet Orange ◽  
Mixed Infections ◽  
Citrus Paradisi ◽  
Inoculum Sources ◽  
Toxoptera Citricida ◽  
Orange Trees ◽  
Tristeza Virus ◽  
Virus Isolates ◽  
Citrus Tristeza

One hundred single brown citrus aphid (BCA) (Toxoptera citricida Kirkaldy) transmission attempts were made from each of 16 different citrus trees [8 grapefruit (Citrus paradisi Macf.) and 8 sweet orange (C. sinensis (L.) Osbeck)] previously inoculated with decline-inducing (T36-CTV), non-decline-inducing (T30-CTV), a mixture of the two Citrus tristeza virus isolate types, or no CTV. Successful CTV transmission occurred in 1.5% of attempts from grapefruit trees that had been bark-chip-inoculated with T36-CTV, 3% of attempts from orange trees inoculated with T36-CTV, 3% of attempts from grapefruit trees inoculated with both T36- and T30-CTV, 4% of attempts from orange trees inoculated with both T36- and T30-CTV, 1.5% of attempts from grapefruit trees inoculated with T30-CTV, and 3.5% of attempts from orange trees inoculated with T30-CTV. Single BCA were able to recover T30-like-CTV from trees believed to be inoculated only with T36-CTV, and T36-like-CTV from trees believed to be inoculated only with T30-CTV, suggesting that these inoculum sources were also mixtures of T36-CTV and T30-CTV. The T36-CTV was not immunologically detectable in some of the trees from which it was transmitted indicating that single BrCA can recover T36-CTV from a T36-CTV/T30-CTV mixture in which the T36-CTV is an undetectable, minority component.

scholarly journals First Report from Syria of Citrus tristeza virus in Citrus spp.

Plant Disease ◽  
2008 ◽  
Vol 92 (10) ◽  
pp. 1468-1468
Author(s):  
R. Abou Kubaa ◽  
K. Djelouah ◽  
A. M. D'Onghia ◽  
R. Addante ◽  
M. Jamal
Keyword(s):  
Citrus Tristeza Virus ◽  
Sweet Orange ◽  
Citrus Limon ◽  
Potential Threat ◽  
First Report ◽  
Mexican Lime ◽  
Vein Clearing ◽  
Citrus Varieties ◽  
Tristeza Virus ◽  
Citrus Tristeza

During the spring of 2006, the main Syrian citrus-growing areas of Lattakia (Jableh, Aledyye, Eseelya, Siano, and Hresoon provinces) and Tartous (Almintar, Aljammase, Karto, Majdaloonelbahr, Yahmour, Amreet, Althawra, and Safita provinces) were surveyed to assess the presence of Citrus tristeza virus (CTV). Eight nurseries (approximately 130 plants per nursery), two budwood source fields (approximately 230 trees per field), and 19 groves (approximately 60 trees per grove) containing the main citrus varieties were visually inspected and sampled for serological assays. The hierarchical sampling method was carried out in each selected grove (2). Infected samples were collected from two nurseries, two budwood source fields, and six groves. Stems and leaf petioles from nursery trees and flower explants from the groves were collected and analyzed for CTV by direct tissue blot immunoassay (DTBIA) with the commercial kit from Plantprint (Valencia, Spain). Of 2,653 samples tested, 89 (4%) CTV-infected plants were detected. Five citrus varieties were found to be infected and Meyer lemon (Citrus limon ‘Meyer’) had the highest incidence at 16%. Numerous sweet orange varieties (Citrus sinensis L.) were found to be highly infected in the field, but only the Washington navel sweet orange was found to be infected in the nurseries. No clear CTV symptoms were observed during the survey. Samples that were positive for CTV by DTBIA were also positive by biological indexing on Mexican lime (C. aurantifolia) and immunocapture-reverse transcription-PCR as described by Nolasco et al. (3). Coat protein gene sequences obtained from five selected clones of a Syrian CTV isolate (GenBank Accession No. EU626555) showed more than 99 and 98% nucleotide sequence identity to a Jordanian CTV isolate (GenBank Accession No. AY550252) and the VT isolate (GenBank Accession No. U56902), respectively. Almost all infected samples induced moderate vein clearing symptoms when grafted to Mexican lime. Symptoms of vein clearing, leaf cupping, stunting, and stem pitting on Mexican lime were induced by graft transmission of CTV from one Valencia sample from the Tartous area. The viral inoculum is widely and randomly distributed in commercial groves, especially in the southern Tartous area and in some nurseries. To our knowledge, this is the first report of CTV in Syria. However, CTV was reported from the neighboring citrus-growing countries of Lebanon, Turkey, and Jordan (1), and the severe seedling yellows strain is present in this area, which poses a potential threat to Syrian citriculture. References: (1) G. H. Anfoka et al. Phytopathol. Mediterr. 44:17, 2005. (2) G. Hughes and T. R. Gottwald, Phytopathology 88:715, 1998. (3) G. Nolasco et al. Eur. J. Plant Pathol. 108:293, 2002.

scholarly journals Agronomic performance of Pera and related sweet orange accessions naturally infected with Citrus tristeza virus in northern Paraná State, Brazil

2014 ◽  
Vol 39 (6) ◽  
pp. 442-448 ◽  
Author(s):  
Viviane Y. Baba ◽  
José S. Giampani ◽  
Zuleide H. Tazima ◽  
Inês F. U. Yada ◽  
Luzia D. Paccola-Meirelles ◽  
...  
Keyword(s):  
Citrus Tristeza Virus ◽  
Sweet Orange ◽  
Agronomic Performance ◽  
Tristeza Virus ◽  
Citrus Tristeza

scholarly journals Breakdown of Cross-Protection of Grapefruit from Decline-Inducing Isolates of Citrus tristeza virus Following Introduction of the Brown Citrus Aphid

Plant Disease ◽  
2003 ◽  
Vol 87 (9) ◽  
pp. 1116-1118 ◽  
Author(s):  
C. A. Powell ◽  
R. R. Pelosi ◽  
P. A. Rundell ◽  
M. Cohen
Keyword(s):  
Immunosorbent Assay ◽  
Citrus Tristeza Virus ◽  
Cross Protection ◽  
Enzyme Linked Immunosorbent Assay ◽  
Experimental Area ◽  
Toxoptera Citricida ◽  
The Cross ◽  
Tristeza Virus ◽  
Citrus Tristeza

A 21-year-old replicated field planting of 84 ‘Ruby Red’ grapefruit trees cross-protected with three mild isolates of Citrus tristeza virus (CTV) was assessed for decline-inducing and non-decline-inducing isolates of the virus 5 years after the brown citrus aphid (BrCA) (Toxoptera citricida Kirkaldy) first was established in the experimental area. Prior to the introduction of the BrCA, the cross-protecting mild isolates had significantly reduced detectable infection with decline-inducing isolates of CTV for 16 years (average infection of 13% in cross-protected trees compared with 67% in unprotected trees). After the introduction of the BrCA, infections with decline-inducing CTV (measured by enzyme-linked immunosorbent assay) were 57, 81, and 71% for trees protected with three mild isolates, respectively, compared with 95% in unprotected trees. These results suggest that the introduction of BrCA accelerated the breakdown of cross-protection against decline-inducing isolates of CTV in grapefruit.

scholarly journals Citrus tristeza virus (CTV) Causing Proteomic and Enzymatic Changes in Sweet Orange Variety “Westin”

PLoS ONE ◽  
2015 ◽  
Vol 10 (7) ◽  
pp. e0130950 ◽  
Author(s):  
Milena Santos Dória ◽  
Aurizângela Oliveira de Sousa ◽  
Cristiane de Jesus Barbosa ◽  
Márcio Gilberto Cardoso Costa ◽  
Abelmon da Silva Gesteira ◽  
...  
Keyword(s):  
Citrus Tristeza Virus ◽  
Sweet Orange ◽  
Enzymatic Changes ◽  
Tristeza Virus ◽  
Citrus Tristeza
Sign in / Sign up

Export Citation Format

Share Document