scholarly journals Surveys in the Chrysanthemum Production Areas of Brazil and Colombia Reveal That Weeds Are Potential Reservoirs of Chrysanthemum Stunt Viroid

Viruses ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 355
Author(s):  
Danielle Gobatto ◽  
Lucas Araújo de Oliveira ◽  
Daniel Andrade de Siqueira Franco ◽  
Nubia Velásquez ◽  
José-Antonio Daròs ◽  
...  
Keyword(s):  
Phylogenetic Analyses ◽  
Weed Species ◽  
Lupinus Polyphyllus ◽  
Chrysanthemum Stunt Viroid ◽  
Stunt Viroid ◽  
Conyza Bonariensis ◽  
Gomphrena Globosa ◽  
Mirabilis Jalapa ◽  
Production Areas ◽  
Different Origins

The stunting disease, incited by chrysanthemum stunt viroid (CSVd), has become a serious problem in chrysanthemum production areas worldwide. Here we identified 46 weed species from chrysanthemum fields in two producing regions of the State of São Paulo, Brazil. The mechanical inoculation of these weeds with a Brazilian CSVd isolate revealed that this viroid was able to infect 17 of these species, in addition to chrysanthemum, tomato and potato. Plants of Oxalis latifolia and chrysanthemum naturally infected with CSVd were found in chrysanthemum fields in Colombia, which is the first CSVd report in that country. Therefore, weeds have the potential to act as reservoirs of CSVd in the field. These results are the first reports of experimental CSVd infection in the following species: Amaranthus viridis, Cardamine bonariensis, Chamaesyce hirta, Conyza bonariensis, Digitaria sanguinalis, Gomphrena globosa, Helianthus annuus, Lupinus polyphyllus, Mirabilis jalapa, Oxalis latifolia, Portulaca oleracea and Catharanthus roseus. The phylogenetic analyses of the CSVd variants identified herein showed three groups with Brazilian CSVd variants distributed in them all, which suggests that Brazilian CSVd isolates may have different origins through successive introductions of infected germplasm of chrysanthemum in Brazil.

Genetic diversity and pathogenicity of potato spindle tuber viroid and chrysanthemum stunt viroid isolates in Russia

2021 ◽  
Author(s):  
Yosuke Matsushita ◽  
Hironobu Yanagisawa ◽  
Aleksandr Khiutti ◽  
Nina Mironenko ◽  
Yasuo Ohto ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Potato Spindle Tuber Viroid ◽  
Chrysanthemum Stunt Viroid ◽  
Stunt Viroid

scholarly journals In Vitro-Transcribed Chrysanthemum stunt viroid RNA Is Infectious to Chrysanthemum and Other Plants

2009 ◽  
Vol 99 (1) ◽  
pp. 58-66 ◽  
Author(s):  
Yosuke Matsushita ◽  
Kumar K. R. Penmetcha
Keyword(s):  
Host Range ◽  
Noncoding Rna ◽  
Chrysanthemum Stunt Viroid ◽  
Stunt Viroid ◽  
Wide Host Range

Chrysanthemum stunt viroid (CSVd), a noncoding RNA, is known to cause chrysanthemum stunt disease, which affects the yield of flowers. To gain insights into CSVd replication, infection, and the reasons for the spreading of CSVd disease in chrysanthemum plants, we prepared linear CSVd RNA and analyzed its ability to cause disease in chrysanthemum plants. We found that linear CSVd replicated as efficiently as CSVd RNA isolated from the infected chrysanthemum plants. Additionally, the linear CSVd RNA was evaluated for its ability to infect other plants as well, which revealed that CSVd has a wide host range for its replication. Importantly, the CSVd isolated from these hosts is infectious to chrysanthemum plants, and thus potentially contributes to the spreading of the disease to chrysanthemum plants.

Alternatives to Atrazine for Weed Management in Processing Sweet Corn

Weed Science ◽  
2016 ◽  
Vol 64 (3) ◽  
pp. 531-539 ◽  
Author(s):  
Zubeyde Filiz Arslan ◽  
Martin M. Williams ◽  
Roger Becker ◽  
Vincent A. Fritz ◽  
R. Ed Peachey ◽  
...  
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Sweet Corn ◽  
Crop Yields ◽  
Production Systems ◽  
Field Trials ◽  
Management Systems ◽  
Weed Species ◽  
Application Timing ◽  
Production Areas

Atrazine has been the most widely used herbicide in North American processing sweet corn for decades; however, increased restrictions in recent years have reduced or eliminated atrazine use in certain production areas. The objective of this study was to identify the best stakeholder-derived weed management alternatives to atrazine in processing sweet corn. In field trials throughout the major production areas of processing sweet corn, including three states over 4 yr, 12 atrazine-free weed management treatments were compared to three standard atrazine-containing treatments and a weed-free check. Treatments varied with respect to herbicide mode of action, herbicide application timing, and interrow cultivation. All treatments included a PRE application of dimethenamid. No single weed species occurred across all sites; however, weeds observed in two or more sites included common lambsquarters, giant ragweed, morningglory species, velvetleaf, and wild-proso millet. Standard treatments containing both atrazine and mesotrione POST provided the most efficacious weed control among treatments and resulted in crop yields comparable to the weed-free check, thus demonstrating the value of atrazine in sweet corn production systems. Timely interrow cultivation in atrazine-free treatments did not consistently improve weed control. Only two atrazine-free treatments consistently resulted in weed control and crop yield comparable to standard treatments with atrazine POST: treatments with tembotrione POST either with or without interrow cultivation. Additional atrazine-free treatments with topramezone applied POST worked well in Oregon where small-seeded weed species were prevalent. This work demonstrates that certain atrazine-free weed management systems, based on input from the sweet corn growers and processors who would adopt this technology, are comparable in performance to standard atrazine-containing weed management systems.

scholarly journals Chrysanthemum Stunt Viroid Resistance in Chrysanthemum

Viruses ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 719 ◽  
Author(s):  
Tomoyuki Nabeshima ◽  
Yosuke Matsushita ◽  
Munetaka Hosokawa
Keyword(s):  
Diagnostic Techniques ◽  
Chrysanthemum Morifolium ◽  
Current Status ◽  
Natural Occurrence ◽  
Chrysanthemum Stunt Viroid ◽  
Stunt Viroid ◽  
Stable Production

Chrysanthemum stunt viroid (CSVd) is one of the most severe threats in Chrysanthemum morifolium production. Over the last decade, several studies have reported the natural occurrence of CSVd resistance in chrysanthemum germplasms. Such CSVd-resistant germplasms are desirable for the stable production of chrysanthemum plants. Current surveys include finding new resistant chrysanthemum cultivars, breeding, and revealing resistant mechanisms. We review the progress, from discovery to current status, of CSVd-resistance studies, while introducing information on the improvement of associated inoculation and diagnostic techniques.

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