| an epidemiological survey of tylcd in southern sardinia (italy). | tomato yellow leaf curl sardinia virus (tylcsv) and tomato yellow leaf curl virus (tylcv) are among the most virulent pathogens of greenhouse tomatoes in sardinia (italy). to investigate the relationship between seasonal population trends of the vector bemisia tabaci and the dynamics of tylcd spread to susceptible crops, between may and october 2007 we carried out a survey in a tomato growing area located in the south of the island. on three farms specialized in the production of fresh market to ... | 2009 | 20222569 |
| first record of tomato yellow leaf curl sardinia virus (tylcsv) on pepper in italy. | during a survey in summer 2007, a disease of pepper (capsicum annuum) under plastic tunnels was observed in policoro (matera), on the ionic coast of basilicata region, with a disease incidence in some cases of more than 50%. affected cultivars were eppo and almund (s et g). the diseased plants exhibited light mosaic or mottling, leaf distortion, interveinal and marginal leaf chlorosis, upward curling of leaf margins of older leaves. the causal pathogen was suspected to be a begomovirus due to th ... | 2008 | 19226766 |
| three years survey of tomato yellow leaf curl sardinia virus reservoir weed hosts in southern italy. | during the period from august 2004 to june 2006 a serious tomato yellow leaf curl epidemic caused by both tomato yellow leaf curl sardinia virus (tylcsv) and tomato yellow leaf curl virus (tylcs) was observed in protected tomato crops in castrovillari, calabria region, in a group of greenhouses where tomato is grown hydroponically. a three years survey for reservoir weed hosts of these viruses was performed during summer period in order to identify where the viruses persist during the host-free ... | 2007 | 18396845 |
| integrated management of tylcv/tylcsv on greenhouse hydroponic tomatoes in southern italy. | tomato yellow leaf curl (tylc) caused by tomato yellow leaf curl virus (tylcv) and tomato yellow leaf curl sardinia virus (tylcsv), vectored by the whitefly bemisia tabaci, is a major disease of tomato in sardinia and sicily, and is becoming a serious threat in southern italy too. tylcsv was first reported in calabria region in 1991, but apparently it was an occasional outbreak, and b. tabaci was not detected. later, during the 2003-2004 winter, a serious epidemic was observed in protected tomat ... | 2006 | 17390886 |
| severe outbreaks of tomato yellow leaf curl sardinia virus in calabria, southern italy. | during the winter 2003--2004 a serious disease was observed in protected tomato crops in castrovillari, reggio calabria province, southern italy. symptoms consisted in marginal leaf yellowing, leaf curling, plant stunting, flower abortion. the disease was detected in a group of greenhouses (about 10ha) where several tomato cultivars were grown hydroponically. the highest incidence of infection (60-100%) was observed in tomatoes grafted on beaufort drs tomato rootstock. since the symptoms were si ... | 2004 | 15756842 |
| whiteflies (bemisia tabaci) issued from eggs bombarded with infectious dna clones of tomato yellow leaf curl virus from israel (tylcv) are able to infect tomato plants. | we have reported previously that tomato yellow leaf curl virus from israel (tylcv) penetrates the reproductive system of its vector, the whitefly bemisia tabaci biotype b, and may be transmitted to progeny. in order to mimic this phenomenon and to understand how tylcv accompanies the development of the insect, we have bombarded b. tabaci eggs with an infectious dna clone of tylcv. after a linear full-length genomic copy of tylcv dna was delivered to eggs, the dpni-sensitive dna became circular a ... | 2002 | 12038688 |
| tomato yellow leaf curl virus from sardinia is a whitefly-transmitted monopartite geminivirus. | the genome of an isolate of tomato yellow leaf curl virus from sardinia, italy (tylcv-s), a geminivirus transmitted by the whitefly bemisia tabaci, has been cloned and sequenced. the single circular dna molecule comprises 2770 nucleotides. genome organisation closely resembles that of the dna a component of the whitefly-transmitted geminiviruses with a bipartite genome. a 1.8 mer of the tylcv-s genome in a binary vector of agrobacterium tumefaciens is infectious upon agroinoculation of tomato pl ... | 1991 | 1840676 |
| two new natural begomovirus recombinants associated with the tomato yellow leaf curl disease co-exist with parental viruses in tomato epidemics in italy. | two tomato geminivirus species co-exist in protected crops in sicily, tomato yellow leaf curl sardinia virus (tylcsv, found in 1989) and tomato yellow leaf curl virus (tylcv, found in 2002), and mixed infections have been detected. in a field survey conducted in 2004, the viral intergenic region (ir) was amplified from infected plants, and molecules apparently hybrid between the two species were found, but only in plants where one or both parental species were also present. two of these hybrids, ... | 2009 | 19463717 |
| recombination profiles between tomato yellow leaf curl virus and tomato yellow leaf curl sardinia virus in laboratory and field conditions: evolutionary and taxonomic implications. | tomato yellow leaf curl sardinia virus and tomato yellow leaf curl virus have co-existed in italian tomato crops since 2002 and have reached equilibrium, with plants hosting molecules of both species plus their recombinants being the most frequent case. recombination events are studied in field samples, as well as in experimental co-infections, when recombinants were detected as early as 45 days following inoculation. in both conditions, recombination breakpoints were essentially absent in regio ... | 2012 | 22971824 |