Taken in the strictest sense (ie, only species
withThielaviopsis anamorphs; Paul and Harrington, 2000; Paulin
et al., 2002), this is a small but important genus of plant pathogens,
causing major diseases on trees throughout the world, including
oak wilt in Iowa. Two recent reviews on oak wilt are available
Many Ceratocystis species have been
moved to new continents by humans, and some have caused serious
economic and ecological losses (Engelbrecht et al. 2004, 2007;
Thorpe et al., 2005; Ocasio et al., 2007). A couple of recent reviews have discussed a possible Latin American origin of the oak wilt fungus, C. fagacearum (Harrington 2009; Juzwik et al., 2008).
We have studied the species that
attack conifers, which appear to be a monopheletic group (Harrington 2009; Harrington
et al., 2002; Witthuhn et al., 1998).
The mating systems of these fungi are of particular
interest. Unidirectional mating type switching occurs in Ceratocystis
(Harrington and McNew, 1997; Witthuhn et al., 2000), and we have examined interfertility
among Ceratocystis species (Harrington and McNew, 1998).
The Ceratocystis fimbriata complex has
been the focus of our research, especially the Latin American clade in Brazil and elsewhere (Ferreira et al., 2010, 2011, 2013; Harrington et al., 2011) and a revision of the North American species (Johnson et al. 2005).
The National Science Foundation was a main supporter of this work (DEB-9870675, DEB-0128104).
Illustrations of various diseases
caused by Ceratocystis
can be found through
this link. Diseases of cacao, sweet potato, inhame, fig, mango,
coffee, aspen, sycamore, hickory, almond, maple, Nothofagus,
palms, and oak are illustrated thus far.
The above link has links
to three more specific pages:
fimbriata (broad sense) diseases
2. A special section on Ceratocystis
wilt of cacao, caused by C. cacaofunesta
3. Diseases caused by Ceratocystis paradoxa, C. fagacearum, C. virescens
and Theilaviopsis australis
A review of the liturature
on Ceratocystis fimbriata and the diseases caused by this
complex of species, prepared for CABI's 2001 Crop Protection Compendium,
Here For All My Publications onCeratocystis and Mating
- Intraspecific and intragenomic variability of ITS sequences reveals taxonomic problems in Ceratocystis fimbriata (pdf of manuscript)
- Yunnan, China population of Ceratocystis fimbriata on pomegranate and taro.(pdf of manuscript)
- Ambrosiella roeperi sp. nov. is the mycangial symbiont of the granulate ambrosia beetle, Xylosandrus crassiusculus (pdf of manuscript).
- Review of Ceratocystis diseases on forest trees. Pp. 230-255 In: Infectious Forest Diseases. P. Gonthier and G. Nicolotti, eds.
- Spatial-temporal patterns of Ceratocystis wilt in Eucalyptus plantations (pdf of manuscript)
- Genotypes of C. fimbriata on eucalyptus in Brazil - Soilborne vs. inoculum in cuttings (pdf of manuscript)
- Genetic variation and variation in aggressiveness among Brazilian populations of C. fimbriata. (pdf of manuscript)
- Ceratocystis fimbriata sensu stricto populations in Brazil (pdf of manuscript)
- First report
of Ceratocystis fagacearum, in New York state (link
of Ceratocystis and where the oak wilt fungus fits (second
chapter in pdf)
- Origin of
the oak wilt fungus (pdf of manuscript)
genetics of Ceratocystis cacaofunesta (pdf
and importance of cacao wilt caused by C. cacaofunesta (pdf of manuscript)
- Canker stain
(C. platani) of oriental plane in Greece (pdf
file of manuscript) .
squamosa, a new host of Ceratocystis fimbriata (pdf file of manuscript).
- The North
American clade of the Ceratocystis fimbriata complex (pdf file of manuscript).
- Ceratocystis fimbriata,
C. cacaofunesta and
C. platani on sweet potato, cacao and sycamore (pdf file of manuscript).
- Ceratocystis fimbriata on Colocasia esculenta in
file of manuscript).
- Ceratocystis fimbriata on the Araceae (pdf file of manuscript).
- Genetic variation in North
American and introduced populations of Ceratocystis fimbriata
f. platani (pdf
file of manuscript).
- Resistance to Ceratocystis
fimbriata in Eucalyptus. (pdf
file of manuscript).
- Microsatellite markers for
Ceratocystis fimbriata. (pdf file of manuscript).
- First report of Thielaviopsis
populi on hybrid poplar in Hungary. (pdf file of manuscript).
- Host specialization in the
Latin American clade of Ceratocystis fimbriata. (pdf file of manuscript).
- Phylogeny and taxonomy of
Chalara, Chalaropsis, and Thielaviopsis
anamorphs (pdf file of manuscript).
- Placement of Chalara
species among ascomycete genera (pdf
file of manuscript)
- Species delimitation and
host specialization of Ceratocystis laricicola and C.
polonica (pdf file of manuscript).
- Genetic variation in the
wilt pathogen Ceratocystis albofundus.
- CAB International. Ceratocystis
fimbriata [original text prepared
by TC Harrington & C Baker]
[text and photos on my website]
- Deletion of the MAT-2 mating
type gene during mating type switching
(down load pdf file of paper)
- Comparison of isozymes,
rDNA spacer regions and MAT-2 DNA sequences in phylogenentics.
- Host specialization in Ceratocystis
- The Ceratocystis species
- PCR-based identification
and phylogeny of species of Ceratocystis sensu stricto. (Download PDF file of full
- Partial interfertility among
the Ceratocystis species on conifers. (Link
- Two species in the Ceratocystis
coerulescens complex from conifers in western North America.
(Link to Abstract)
- Monophyly of the conifer
species in the Ceratocystis coerulescens complex using
DNA sequence data. download pdf
- Self-fertility and uni-directional
mating type switching in Ceratocystis coerulescens. (Download PDF file of
of Ceratocystis fagacearum by nitidulid beetles is illustrated
by clicking on the thumbnail at left.
|| Black wattle (Acacia mearnsii)
on the cliff (left of photo) is showing wilt symptoms due to
wattle wilt, caused by Ceratocystis albofundus. This exotic
tree is commercially important in southern Africa, where it has
also become a serious weed. Wilt is the most serious disease
on black wattle. This view is from God's Window, Mpumalanga,
Deletion of the MAT-2
idiomorph in unidirectional mating type switching is illustrated
by clicking on the gel photo.