Crop Knowledge Master Fungi

ALBUGO PRIMER

General Information Summary
Pathogens & Hosts Taxonomy Characteristics Disease Types Management Graphics References

TYPE: Fungus
SUBDIVISION: Mastigomycotina (produce zoospores)

DISEASES REPORTED TO OCCUR IN HAWAII:
White rust of crucifers

PATHOGENS & HOSTS
Four Albugo species have been reported to occur in Hawaii. They include: Albugo candida, Albugo ipomoeae-panduratae, Albugo occidentalis, and Albugo platensis (Raabe, et al, 1981).
The following is a list of the reported pathogens from this genus
(Albugo) and the hosts they infect. The list is organized by the scientific name of the pathogen species (CAPITAL LETTERS), followed by the various susceptible plant hosts. Words in blue indicate what symptom or disease a given pathogen causes on the listed hosts.

ALBUGO CANDIDA
White Rust:
horseradish (Armoracia lapthifolia)
field mustard (Brassica campestris)
rutabaga (Brassica campestris var. napobrassica)
pak-choi (Brassica chinensis)
leaf or Chinese mustard (Brassica juncea)
black mustard (Brassica nigra = Sinapsis cernua)
broccoli, cauliflower (Brassica oleracea var. botrytis)
Chinese or celery cabbage (Brassica pekinensis)
turnip (Brassica rapa)
pepper grass (Lepidium sp.)
radish (Raphanus sativus)
daikon (Raphanus sativus var. longipinnatus)

ALBUGO IPOMOEAE-PANDURATAE
White Rust:
water morning-glory (Ipomoea aquatica)
morning glory (I. congesta)

ALBUGO ?OCCIDENTALIS
White Rust:
spinach (Spinacia oleracea)

ALBUGO PLATENSIS
White Rust:
boerhavia (Boerhavia coccinea)

TAXONOMY
KINGDOM: Mycetae (fungi)
DIVISION: Eumycota (eumycetes)
SUBDIVISION: Mastigomycotina (produce zoospores)
CLASS: Oomycetes (The water molds, white rusts, and downy mildews)
ORDER: Peronosporales
FAMILY: Albuginaceae (the white rusts)

GENERAL CHARACTERISTICS
Conidia of this fungus are borne in white blister-like sori beneath the raised host epidermis, which eventually ruptures. Its conidiophores are short and club-shaped containing globose condia in chains. Oospores can be found embedded in old lesions. The surface markings (tuberculate, ridged, or reticulate) of these oospores are used to distinguish between different species (Streets, 1982).

TYPES OF DISEASES
Albugo spp. are obligate parasites that cause white rust and staghead of Brassicaceae, Convolvulaceae, and others (Agrios, 1988; Farr et al., 1989). Albugo spp. are members of the oomycetes that affect only or primarily the aboveground tissues of their hosts, in particular the leaves, young stems, and fruits (Streets, 1982).

MANAGEMENT
No information is available for this section at the moment, please check future Knowledge Master Versions.

REFERENCES
Agrios, G.N. 1988. Plant Pathology, 3rd edition. Academic Press, Inc: San Diego. 803 pp.

Farr, , D.F., G.F. Bills, G.P. Chamuris, and A.Y. Rossman. 1989. Fungi on Plants and Plant Products in the United States. APS PRESS: St. Paul, Minnesota. 1252 pp.

Raabe, Robert D., Ibra L. Conners, and Albert P. Martinez. 1981. Checklist of Plant Diseases in Hawaii. Hawaii Institute of Tropical Agriculture and Human Resources, College of Tropical Agriculture and Human Resources, University of Hawaii (Information Text Series 022).

Streets, R.B. 1982. The Diagnosis of Plant Diseases: a field and laboratory manual emphasizing the most practical methods for rapid identification. The University of Arizona Press: Tucson, Arizona.

AUTHOR & SUMMARY DATE
Andrew K. Gonsalves, Educational Specialist, and Stephen A. Ferreira, Extension Plant Pathologist; Department of Plant Pathology, University of Hawaii at Manoa, CTAHR.

JUNE 1994

1-ALBUGO

Back To:

Crop Master Menu

Knowledge Master Home

Pest Search