The Efficacy of Orange Terpene and Strain BM103 on the Control of Periwinkle Leaf Yellowing Phytoplasma.

Phytoplasmas are obligate phytopathogenic bacteria belonging to the class Mollicutes. The pathogens, transmitted by insect vectors, associated with hundreds of plant diseases worldwide. Due to the regulation on banning use of antibiotics and limited efficacy of the traditional disease management manners, an eco-friendly alternative is needed.

First Report of ' Phytoplasma asteris'-related Strain (16SrI group) Associated with Small Leaves, Leaf Yellowing, and Shoot Proliferation of Morning Glory () in Taiwan.

Ipomoea biflora L., commonly known as morning glory, is an herbaceous vine plant in the Convolvulaceae family and is widespread at low elevations in Taiwan and other East Asian countries. In September 2023, six I.

First Report of ' Phytoplasma australasiaticum' Associated with Phyllody, Virescence, and Witches'-Broom Disease in in Taiwan.

Chrysanthemum morifolium (Asteraceae) is commonly grown as commercial cut flowers or pot mums worldwide. Common diseases of chrysanthemum include bacterial blight, fungal diseases, viruses, and phytoplasmas (Verma et al. 2003; Taloh et al.

Virus-virus interactions alter the mechanical transmissibility and host range of begomoviruses.

Introduction: Begomoviruses are mainly transmitted by whiteflies. However, a few begomoviruses can be transmitted mechanically. Mechanical transmissibility affects begomoviral distribution in the field.

TaqMan Quantitative PCR Detection of in Taiwan.

(Xt) is a nutritionally fastidious bacterial pathogen causing pear leaf scorch disease (PLSD) in Taiwan. The disease causes early defoliation, loss of tree vigor, and reduction in fruit yield and quality. No cure for PLSD is available.

Seed and Pollen Transmission of Tomato Leaf Curl New Delhi Virus, Tomato Leaf Curl Taiwan Virus, and Tomato Yellow Leaf Curl Thailand Virus in Cucumbers and Tomatoes.

Understanding the seedborne nature of plant viruses is essential for developing disease control strategies and is impactful to the seed market. Here, we investigated seed transmissibility of tomato leaf curl New Delhi virus-cucumber isolate (ToLCNDV-CB) and -oriental melon isolate (ToLCNDV-OM) in cucumber and seed transmissibility of tomato leaf curl Taiwan virus (ToLCTV) and tomato yellow leaf curl Thailand virus (TYLCTHV) in tomato. Parent plants were inoculated using agroinfiltration with virus infectious clones, and virus infection was confirmed by PCR with virus-specific primers.

First Report of Bidens Mottle Virus Causing Mild mottle and Leaf Distortion in in Taiwan.

Stachytarpheta jamaicensis, a traditional herbal pharmacological plant in the Family Verbenaceae that produces purplish-blue flowers, is mainly used as a garden plant in tropical and subtropical areas, including Taiwan. A begomovirus, stachytarpheta leaf curl virus (StaLCV) that caused disease on S. jamaicensis, has been reported (Xiong et al.

First Report of ' Phytoplasma asteris' (16SrI group) Associated with Witches'-Broom Disease in Taiwan.

Murraya exotica L., commonly known as orange jasmine, is an evergreen shrub belonging to the Rutaceae family. It has long been used as traditional Chinese medicine for treating abdominal pain, toothache, scabies, and other disorders (Liu et al.

FKBP-type peptidyl-prolyl cis-trans isomerase interacts with the movement protein of tomato leaf curl New Delhi virus and impacts viral replication in Nicotiana benthamiana.

Begomoviruses belonging to the family Geminiviridae are plant-infecting DNA viruses. Begomoviral movement protein (MP) has been reported to be required for virus movement, host range determination, and symptom development. In the present study, the FK506-binding protein (FKBP)-type peptidyl-prolyl cis-trans isomerase (NbFKPPIase) of Nicotiana benthamiana was identified by a yeast two-hybrid screening system using the MP of tomato leaf curl New Delhi virus (ToLCNDV) oriental melon (OM) isolate (MP ) as bait.

Universal Primers for Rapid Detection of Six Pospiviroids in Solanaceae Plants Using One-Step Reverse-Transcription PCR and Reverse-Transcription Loop-Mediated Isothermal Amplification.

A number of viruses and viroids infect solanaceous plants causing severe yield losses. Several seed-borne viroids are listed as quarantine pathogens in many countries. Among them, columnea latent viroid, pepper chat fruit viroid, potato spindle tuber viroid, tomato apical stunt viroid, tomato chlorotic dwarf viroid, and tomato planta macho viroid are of major concerns.

Characterization of a New Monopartite Begomovirus with a Betasatellite Associated with Leaf Curl, Yellow Vein, and Vein Enation in .

A new begomovirus, tentatively named hibiscus yellow vein leaf curl virus (HYVLCV), was identified in plants showing symptoms of leaf curl, yellow vein, and vein enation on the undersides of the leaf in Taiwan. Sequence analysis of the full-length HYVLCV genome from the rolling cycle amplicon revealed a genome of 2,740 nucleotides that contains six open reading frames and a conserved sequence (5'-TAATATTAC-3') commonly found in geminiviral genomes. HYVLCV shares the highest nucleotide identity (88.

A single amino acid substitution in the movement protein enables the mechanical transmission of a geminivirus.

Begomoviruses of the Geminiviridae are usually transmitted by whiteflies and rarely by mechanical inoculation. We used tomato leaf curl New Delhi virus (ToLCNDV), a bipartite begomovirus, to address this issue. Most ToLCNDV isolates are not mechanically transmissible to their natural hosts.

Biological, Pathological, and Molecular Characteristics of a New Potyvirus, Dendrobium Chlorotic Mosaic Virus, Infecting Orchid.

is one of the popular orchids in Taiwan. This report describes a new potyvirus tentatively named Dendrobium chlorotic mosaic virus (DeCMV) causing chlorotic and mosaic symptoms in . .

Draft Genome Sequence of " Sulcia muelleri" Strain KPTW1 from , a Vector of Xylella fastidiosa Causing Pierce's Disease of Grapevine in Taiwan.

The genome of "Candidatus Sulcia muelleri" strain KPTW1 from Kolla paulula, a vector of Xylella fastidiosa that causes Pierce's disease (PD) of grapevine in Taiwan, was sequenced. The strain has a genome size of 253,942 bp, GC content of 22.7%, 237 predicted protein-coding genes, and 34 RNA genes.

Whole-Genome Sequence of subsp. Strain BB01 Isolated from a Blueberry in Georgia, USA.

This study reports a -assembled draft genome sequence of subsp. strain BB01 causing blueberry bacterial leaf scorch in Georgia, USA. The BB01 genome is 2,517,579 bp, with a G+C content of 51.

Draft Genome Sequence of Xylella fastidiosa subsp. multiplex Strain Griffin-1 from Quercus rubra in Georgia.

The draft genome sequence of Xylella fastidiosa subsp. multiplex strain Griffin-1, isolated from a red oak tree (Quercus rubra) in Georgia, is reported here. The bacterium has a genome size of 2,387,314 bp, with a G+C content of 51.

Characterization of a Novel Adhesin-like Gene and Design of a Real-Time PCR for Rapid, Sensitive, and Specific Detection of Spiroplasma kunkelii.

Spiroplasma kunkelii, a cell wall-less bacterium, is the causal agent of corn stunt disease. The pathogen is restricted to phloem sieve cells of infected plants and is transmitted by phloem-feeding leafhoppers. Since symptoms of corn stunt disease may not appear until close to flowering time, early detection of the pathogen in disease-transmitting leafhoppers and in symptomless foliar tissues of host plants is critical to disease forecasting and outbreak management.

Sequence diversity of beta-tubulin (tubA) gene in Phaeosphaeria nodorum and P. avenaria.

Full-length coding sequences of the beta-tubulin gene (tubA) were PCR-amplified and sequenced from 42 Phaeosphaeria isolates, including 16 P. nodorum and 23 P. avenaria species from cereals, two Polish isolates from rye (Secale cereale L.

Xylella fastidiosa subspecies: X. fastidiosa subsp. [correction] fastidiosa [correction] subsp. nov., X. fastidiosa subsp. multiplex subsp. nov., and X. fastidiosa subsp. pauca subsp. nov.

Xylella fastidiosa, a fastidious bacterium causing disease in over 100 plant species, is classified as a single species, although genetic studies support multiple taxons. To determine the taxonomic relatedness among strains of X. fastidiosa, we conducted DNA-DNA relatedness assays and sequenced the 16S-23S intergenic spacer (ITS) region using 26 strains from 10 hosts.

An evolutionary perspective of Pierce's disease of grapevine, citrus variegated chlorosis, and mulberry leaf scorch diseases.

Xylella fastidiosa causes diseases on a growing list of economically important plants. An understanding of how xylellae diseases originated and evolved is important for disease prevention and management. In this study, we evaluated the phylogenetic relationships of X.