Rhodococcus fascians

bacterium

Corynebacterium fascians, Bacterium fascians, Phytomonas fascians, Pseudobacterium fascians, Rhodococcus rubropertinctus

Europe, North America, Central America, Australia, New Zealand, Iran, Russia, Egypt, Colombia

Widespread

Brazil, Thailand

2023-08-21

Though found in many US states, the pathogen is usually restricted and localized. Probably Worldwide, though not reported. Disease outbreaks are sporadic and usually related to poor sanitation. Bulbs, floral and greenhouse crops most susceptible to disease outbreaks. No reports of seed as a pathway in vegetables and agronomic crops.

Primarily a pest of ornamentals, woody ornamentals and floowers. Vegetables and agronomic crops reported susceptible to the bacterium are listed below. Transmits primarily through propagation.

No

CORBFA-3, CORBFA-1

No evidence that seed is a pathway

CORBFA-3, CORBFA-1

Septoria dianthi

fungus

Worldwide

OH, AL, IA, MI, NY, CA, HI, MS, TX, NC, NJ

Korea

2024-08-19

Septoria dianthi causes small circular brown spots with purplish brown borders on the leaves and stems of the plants. Small black specks may occur and lead to leaf deformation, necrosis, and scorching appearance. It can survive on infected plant debris. Once spores are released, they can be dispersed through wind, rain, and water.

Dianthus

No

SEPTDN-1, SEPTDN-2, SEPTDN-3

No references found indicating seed is a pathway.

SEPTDN-1, SEPTDN-2, SEPTDN-3

Dickeya chrysanthemi

bacterium

Dickeya chrysanthemi bv. chrysanthemi Dickeya chrysanthemi bv. parthenii Dickeya chrysanthemi pv. chrysanthemi Dickeya chrysanthemi pv. parthenii Erwinia carotovora f.sp. parthenii Erwinia carotovora var. chrysanthemi Erwinia chrysanthemi Erwinia chrysanthemi pv. chrysanthemi Erwinia chrysanthemi pv. parthenii ( Pectobacterium carotovorum f.sp. chrysanthemi Pectobacterium carotovorum var. chrysanthemi Pectobacterium chrysanthemi Pectobacterium chrysanthemi pv. chrysanthemi Pectobacterium chrysanthemi pv. parthenii Pectobacterium parthenii Pectobacterium parthenii var. chrysanthemi Pectobacterium parthenii-dianthicola

Worldwide

AR, CA, CO, CT, FL, GA, IL, MA, MN, NE, NY, NC, ND, OH, PA, SD, TX, VA, WI

Mexico, China

2025-09-12

Dickeya chrysanthemi strains have been isolated from a number of different hosts in different countries. The list of all susceptible plants after inoculation by Dickeya chrysanthemi would be far longer than the natural host range, and difficult to establish. There is little if any information on seed as a pathway for this pathogen and therefore should not be regulated. Eriwina chrysanthemi has been reclassified into Pectobacterium spp. and Dickeya spp.

Primarily ornamentals and flowers. Main: Araceae, Asteraceae familes

No

CABI CPC, ERIWCH-14

No references found indicating carnation seed is a pathway.

CABI CPC, ERIWCH-14

Erwinia rhapontici

bacteria

Aplanobacter rhapontici, Bacillus rhapontici, Bacterium rhapontici, Erwinia carotovora var. rhapontici, Pectobacterium rhapontici, Phytomonas rhapontici, Pseudobacterium rhapontici,Xanthomonas rhapontici

Asia, Europe, Canada, Mexico, New Zealand

Western and Midwest states

Brazil

2023-04-20

Brazil lists this as Pectobacterium rhapontici.

Primarily rhubarb and wheat. Reported on a few vegetables.

No

No evidence that seed is a pathway. No references found indicating seed is a pathway in dianthus spp.