Ambrosia beetles are beetles of the weevil subfamilies Scolytinae and Platypodinae, which live in nutritional symbiosis with ambrosia fungi. The beetles excavate tunnels in dead or stressed trees in which they cultivate fungal gardens, their sole source of nutrition. After landing on a suitable tree, an ambrosia beetle excavates a tunnel in which it releases its fungal symbiont. The fungus penetrates the plant's xylem tissue, extracts nutrients from it, and concentrates the nutrients on and near the surface of the beetle gallery. Ambrosia fungi are typically poor wood degraders, and instead utilize less demanding nutrients. Symbiotic fungi produce and detoxify ethanol, which is an attractant for ambrosia beetles and likely prevents growth of antagonistic pathogens and selects for other beneficial symbionts. The majority of ambrosia beetles colonize xylem of recently dead trees, but some attack stressed trees that are still alive, and a few species attack healthy trees. Species differ in their preference for different parts of trees, different stages of deterioration, and in the shape of their tunnels ("galleries"). However, the majority of ambrosia beetles are not specialized to any taxonomic group of hosts, unlike most phytophagous organisms including the closely related bark beetles. One species of ambrosia beetle, Austroplatypus incompertus exhibits eusociality, one of the few organisms outside of Hymenoptera and Isoptera to do so.
In mycology, the terms teleomorph, anamorph, and holomorph apply to portions of the life cycles of fungi in the phyla Ascomycota and Basidiomycota:
Armillaria luteobubalina, commonly known as the Australian honey fungus, is a species of mushroom in the family Physalacriaceae. Widely distributed in southern Australia, the fungus is responsible for a disease known as Armillaria root rot, a primary cause of Eucalyptus tree death and forest dieback. It is the most pathogenic and widespread of the six Armillaria species found in Australia. The fungus has also been collected in Argentina and Chile. Fruit bodies have cream- to tan-coloured caps that grow up to 10 cm (4 in) in diameter and stems that measure up to 20 cm (8 in) long by 1.5 cm (1 in) thick. The fruit bodies, which appear at the base of infected trees and other woody plants in autumn (March–April), are edible, but require cooking to remove the bitter taste. The fungus is dispersed through spores produced on gills on the underside of the caps, and also by growing vegetatively through the root systems of host trees. The ability of the fungus to spread vegetatively is facilitated by an aerating system that allows it to efficiently diffuse oxygen through rhizomorphs—rootlike structures made of dense masses of hyphae.
Botryosphaeria dothidea is a plant pathogen that causes the formation of cankers on a wide variety of tree and shrub species. It has been reported on several hundred plant hosts and on all continents except Antarctica. B. dothidea was redefined in 2004, and some reports of its host range from prior to that time likely include species that have since been placed in another genus. Even so, B. dothidea has since been identified on a number of woody plants—including grape, mango, olive, eucalyptus, maple, and oak, among others—and is still expected to have a broad geographical distribution. While it is best known as a pathogen, the species has also been identified as an endophyte, existing in association with plant tissues on which disease symptoms were not observed. It can colonize some fruits, in addition to woody tissues.
Armillaria fuscipes is a plant pathogen that causes Armillaria root rot on Pinus, coffee plants, tea and various hardwood trees. It is common in South Africa. The mycelium of the fungus is bioluminescent.
The minute tree-fungus beetles, family Ciidae, are a sizeable group of beetles which inhabit Polyporales bracket fungi or coarse woody debris. Most numerous in warmer regions, they are nonetheless widespread and a considerable number of species occur as far polewards as Scandinavia for example.
Armillaria novae-zelandiae is a species of mushroom-forming fungus in the family Physalacriaceae. This plant pathogen species is one of three Armillaria species that have been identified in New Zealand.
The corticioid fungi are a group of fungi in the Basidiomycota typically having effused, smooth basidiocarps that are formed on the undersides of dead tree trunks or branches. They are sometimes colloquially called crust fungi or patch fungi. Originally such fungi were referred to the genus Corticium and subsequently to the family Corticiaceae, but it is now known that all corticioid species are not necessarily closely related. The fact that they look similar is an example of convergent evolution. Since they are often studied as a group, it is convenient to retain the informal (non-taxonomic) name of "corticioid fungi" and this term is frequently used in research papers and other texts.
Celoporthe is a genus of ascomycete fungi within the family Cryphonectriaceae. It was circumscribed in 2006 to contain the type species Celoporthe dispersa, which was found in South Africa growing on trees in the Myrtales. In 2011, several species were described from China and Indonesia: C. eucalypti, C. guangdongensis, C. indonesiensis, and C. syzygii. Molecular analysis of DNA sequences revealed an additional two species from South Africa in 2013, C. fontana and C. woodiana and in 2020 three more species from Hawaii were added to the genus.
Gondwanamyces is a genus of fungi in the family Ceratocystidaceae. The genus was circumscribed in 1998.
Amylostereum is the single genus in the fungal family Amylostereaceae. The genus currently comprises four saprotrophic and parasitic species, which live off living or dead wood. The Amylostereaceae cause white rot in the wood by disintegrating the tissue component lignin. They produce crust-like, partially wavy fruit bodies on the surface of infested trees, which are similar to those produced by Stereum species.
Rostraureum is a genus of fungi in the family Cryphonectriaceae. The genus was erected in 2005 with a single species, namely Rostraureum tropicale.
Rostraureum tropicale is a species of fungus from genus Rostraureum that is found in Ecuador.
The genus Saproamanita contains about 24 species of agarics and is one of six genera in the family Amanitaceae, of which the similar Amanita is also a member. Saproamanita differs from Amanita in that its species are saprophytic, and not ectomycorrhizal.
Brenda D. Wingfield is a South African Professor of genetics and previous Deputy Dean of the University of Pretoria. She is known for her genetic studies of fungal tree pathogens.
Professor Michael John Wingfield is a South African academic and scientist who studies plant pathology and biological control. He was the founding director of the Forestry and Agricultural Biotechnology Institute, University of Pretoria. Wingfield has authored or co-authored over 1,000 scientific publications and is considered a leading expert in the field of forest health and invasive species. He has received numerous awards and honours throughout his career, including Harry Oppenheimer Fellowship Award and John Herschel Medal, the highest accolade from the Royal Society of South Africa. He is also a Fellow of the Royal Society of South Africa and the African Academy of Sciences. Wingfield has had several fungi named after him.
Pewenomyces is a genus of fungi in the family Coryneliaceae. The genus was first described in 2015 in Chile growing as canker pathogen on monkey puzzle trees and the species was named Pewenomyces kutranfy.
Cryphalus mangiferae, the mango bark beetle, is a tiny tropical bark beetle which attacks mango trees. It is often cited as a vector of plant pathogenic fungi infecting mango trees. The species belongs to the family Curculionidae, subfamily Scolytinae.
Amphilogia gyrosa, the orange hobnail canker, is a species of sac fungus in the family Cryphonectriaceae. It is the type species for the genus Amphilogia. They have been found on hinau trees. Until a revision in 2005, the species was classified in the genus Cryphonectria.
