Dahlia spp.
dahlia
3 Related Pests
Aphelenchoides ritzemabosi
nematode
Aphelenchoides ribes, Aphelenchoides phyllophagus, Aphelenchoides ritzema-bosi, Pathophelenchus ritzemabosi, Pseudaphelenchoides ritzemabosi, Tylenchus ribes
Africa: Mauritus, South Africa; Asia: China, India, Iran, Japan, Kazakhstan, South Korea, Uzbekistan; Europe: Bulgaria, Croatia, Germany, Hungary, Ireland, Italy, Latvia, Netherlands, Poland, Portugal, Russia, Serbia, Slovenia, Spain, Switzerland, Ukraine, UK; North America: Cuba, Mexico, USA; Oceania: Fiji, New Zealand; South America: Brazil, Chile, Venezuela.
CA, CO, FL, WY.
China
2024-09-15
Aphelenchoides ritzemabosi primarily affects the leaves of chrysanthemums but also infects a wide range of ornamentals and vegetables. Seed is not known to be a pathway however there is one report from 1956 of transmission on aster seed.
Reported on a wide range of hosts. Main: Chrysanthemum, Dahlia, Strawberry; Other: sunflower, alfalfa, bean, tomato.
No
APLORI-1, CABICPC, APLORI-4
No evidence that seed is a pathway.
APLORI-1, CABICPC, APLORI-4
Chrysanthemum stunt viroid
viroid
Chrysanthemum stunt pospiviroid, Chrysanthemum stunt virus
Africa: Egypt, Kenya, South Africa, Uganda; Asia: China, India, Japan, South Korea, Taiwan, Thailand, Turkey; Europe: Belgium, Czechia, Germany, Italy, Netherlands, Norway, Poland, Russia, Sweden, UK; North America: Canada, USA; Oceania: Australia, New Zealand, South America: Brazil, Colombia.
KS, MI, MN, NY, PA
Mexico
2025-06-18
Chrysanthemum stunt viroid spreads most efficiently through vegetative propagation, where infected mother plants pass the viroid to cuttings. It is easily transmitted through grafting, sap contact, and the use of contaminated tools or hands. Seed and pollen transmission is possible but variable, with evidence of transmission in both chrysanthemum (under certain conditions) and tomato.
Main: Chrysanthemum morifolium; Other: Ageratum spp., Argyranthemum frutescens, Petunia hybrida
No
CSVd00-7, CSVD00-11
No evidence that Dahlia seed is a pathway. The reference above only concluded that Dahlia spp. may be a natural host.
CSVd00-7, CSVD00-11
Nakashima, A., Hosokawa, M., Maeda, S. and Yazawa, S., 2007. Natural infection of Chrysanthemum stunt viroid in dahlia plants. Journal of General Plant Pathology, 73:225-227.
Cho, W. K., Jo, Y., Jo, K. M., & Kim, K. H. (2013). A current overview of two viroids that infect chrysanthemums: Chrysanthemum stunt viroid and Chrysanthemum chlorotic mottle viroid. Viruses, 5(4), 1099-1113.
Tomato spotted wilt virus
virus
Tomato spotted wilt tospovirus, Tomato spotted wilt virus group
Worldwide
Widespread
2023-08-21
Seed is not a pathway for Tospoviruses, including Tomato spotted wilt virus
Wide host range. Over 800 plant species are known hosts. Primarily ornamentals,flowers. No evidence that small grains or corn are hosts.
No
TSWV00-1, TSWV00-3
Seed is not a pathway for Tospoviruses, including Tomato spotted wilt virus.
TSWV00-1, TSWV00-3
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