Agriculture Reference
In-Depth Information
Table 11.1.
Important bacterial, oomycete, and fungal diseases of the potato.
Common name; synonyms (previous
names), other
species and races
Symptoms or signs
Causal agent
Distribution
Foliage
Tubers
BACTERIA
Candidatus
Liberibacter
solanacearum
Zebra chip
Latin America, New
Zealand, south-western
and Pacific north-western
USA
Yellowing
Discoloration, especially of
processed tubers
Clavibacter michiganensis
subsp.
sepedonicus
Ring rot
Europe, North America
Wilt, rolling of leaflet
margins, mottling, necrosis
Discoloration of vascular ring
and adjacent tissue with
bacterial ooze
Pectobacterium carotovora
Blackleg, soft rot
Worldwide
Wilt
Soft rot
Pseudomonas fluorescens
Pink eye
Worldwide
Pink discoloration, especially
around lenticels and eyes
Ralstonia solanacearum
(Smith) Yabuuchi
et al
.
Bacterium solanacearum
(Smith) Chester
Burkholderia solanacearum
(Smith) Yabuuchi
et al
. (1992)
Pseudomonas solanacearum
(Smith) Smith
Brown rot; Race
1
and
2
(“warm biotypes”); Race
3
Biovar2
“temperate biotype”
R1: Africa, southern USA,
southern Asia, Middle
East
R2: Central America, North
Africa, South America,
southern Asia
R3B2: Africa, USA, Central
America, South America,
Russia, India, China,
Australasia
Wilt
Discoloration of vascular ring
and adjacent tissue with
bacterial ooze
Streptomyces scabies
,
Streptomyces
acidiscabies
,
Streptomyces turgidiscabies
,
Streptomyces
europaeiscabiei
Common scab
Worldwide
None
Superficial blemishes to deep
pitted or raised lesions
OOMYCETE
Phytophthora infestans
(Mont.) de Bary.
Potato late blight
Worldwide
Progressive necrosis and
±
defoliation
Tuber rot
Continued
