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FUNGUS SPORE [6 records]

Record 1 2024-11-27

English

Subject field(s)
  • Plant Diseases
  • Silviculture
  • Crop Protection
  • Maple-Sugar Industry
CONT

Also known as purple eye, this disease is caused by a fungus. The spots start yellow with a purplish border, until a spore develops in the centre.

OBS

Purple-bordered leaf spot is caused by the fungus Phyllosticta minima, which overwinters in leaf litter.

French

Domaine(s)
  • Maladies des plantes
  • Sylviculture
  • Protection des végétaux
  • Industrie de l'érable
OBS

Cette maladie peut facilement être confondue avec la galle causée par un insecte, la cécidomyie ocelligène, qui attaque les mêmes espèces d'arbre.

OBS

La tache foliaire de l'érable est causée par le champignon Phyllosticta minima.

Spanish

Save record 1

Record 2 2011-11-21

English

Subject field(s)
  • Plant Diseases
  • Grain Growing
DEF

The common smut of Indian corn caused by a fungus(Ustilago maydis) and characterized by grayish white swellings that rupture to expose a black spore mass.

CONT

Like other smut diseases, common smut of corn derives its name from the sooty masses of teliospores found on infected host plants ... The most obvious symptoms are tumor-like galls that vary in size from less than 1 cm to more than 30 cm (0.4-12 inch) in diameter. All meristematic tissues are susceptible to infection. Galls are found most frequently on ears, tassels, stalks, nodal shoots, and mid-ribs of leaves ... Even though galls may form on many above-ground parts of the plant, infection is local (i.e., the host is not colonized systemically). Occasionally, galls develop beneath the soil surface when the apical meristem of a young plant is infected.

OBS

Although Ustilago maydis occurs throughout the world where corn is grown, the occurrence of common smut is localized in Australia where the disease is known as "maize boil smut".

French

Domaine(s)
  • Maladies des plantes
  • Culture des céréales
DEF

Maladie du maïs causée par un champignon pathogène, Ustilago maydis.

OBS

Ustilago maydis attaque principalement les parties des plantes se trouvant en division cellulaire active. Les symptômes sont des sores gris qui apparaissent sur les tiges, les épis, les feuilles ou les inflorescences. Les sores éclatent après un certain temps et des spores brunes à noires sont libérées. Celles-ci peuvent survivre dans le sol pendant au moins 4 ans. Les plantes sont contaminées par des spores se trouvant dans le sol ou l'air.

Spanish

Campo(s) temático(s)
  • Enfermedades de las plantas
  • Cultivo de cereales
CONT

El carbón común del maíz causado por Ustilago maydis, se identifica fácilmente por las agallas tipo tumor que se forman en los tejidos en activo crecimiento. Estas contienen una masa oscura, pulverulenta de teliosporas (esporas del carbón). Las agallas jóvenes se consideran comestibles y en México se conoce a la comida como cuitlacoche (Sin. huitlacoche).

Save record 2

Record 3 2006-11-23

English

Subject field(s)
  • Fungi and Myxomycetes
  • Plant Diseases
CONT

Smuts, of the fungus order Ustilaginales, are named for their sooty black spore masses. Like the rusts, they belong to the Basidiomycetes and are all plant parasites, of most economic importance on cereals and grasses, but they differ from rusts in having a less complicated life history and in being able to live part of their lives saprophytically in rich organic matter or in culture media.

CONT

There are three types of infection with smuts ... 1. Infection of seedlings as the seed germinates, from spores adhering to the outside of the seed or present in soil ... 2. Seedling infection by mycelium within the seed as a result of ovary infection from spores germinating on the stigma ... 3. Infection of any actively growing meristematic tissue (roots, shoot, tassels, or young ears) by spores transported by wind from decaying plant material ...

French

Domaine(s)
  • Champignons et myxomycètes
  • Maladies des plantes
DEF

Nom commun des champignons basidiomycètes de l'ordre des ustilaginales [responsables de la maladie du charbon].

OBS

Les spores du champignon causant le charbon survivent dans le sol pendant de nombreuses années, et même des rotations sur plusieurs années n'arrivent pas à réduire l'incidence de la maladie.

Spanish

Save record 3

Record 4 2003-12-23

English

Subject field(s)
  • Fungi and Myxomycetes
DEF

A fungus in the order Uredinales(of the Basidiomycetes), characterized by obligate parasitism and as many as 5 spore forms, frequently with alternate hosts.

OBS

Spores of the more evident stages are generally orange to rusty brown in colo(u)r.

French

Domaine(s)
  • Champignons et myxomycètes
DEF

Champignon de l'ordre des Urédinales, caractérisé par son parasitisme obligatoire, qui peut avoir jusqu'à 5 types différents de spores, souvent avec des hôtes alternants. Aux stades les plus typiques, les spores sont souvent d'une couleur allant de l'orange, au brun-rouille, ce qui donne son nom à la maladie.

Spanish

Campo(s) temático(s)
  • Hongos y mixomicetos
DEF

Hongo del orden Uredinales, parásito, que produce cinco tipos de esporas y produce la enfermedad del mismo nombre.

Save record 4

Record 5 2003-06-17

English

Subject field(s)
  • Plant Biology
  • Fungi and Myxomycetes
  • Biotechnology
DEF

A dark two-celled thick-walled binucleate spore formed towards the end of the growing season by rust and smut fungi. Teleutospores develop in a black sorus, the teleutosorus or telium, and are the form in which the fungus overwinters...

French

Domaine(s)
  • Biologie végétale
  • Champignons et myxomycètes
  • Biotechnologie
OBS

Stade physiologique de repos des rouilles.

Spanish

Campo(s) temático(s)
  • Biología vegetal
  • Hongos y mixomicetos
  • Biotecnología
Save record 5

Record 6 1985-05-28

English

Subject field(s)
  • Plant Diseases
OBS

The fungus that causes stem blight, Didymella bryoniae, has had its name changed by the taxonomists several times. It has been reported as Mycosphaerella citrullina and M. melonis and, because it has another spore state, also as Ascochyta citrullina, A. melonis, and Phyllosticta citrullina.

Key term(s)
  • stem end rot of cucumber

French

Domaine(s)
  • Maladies des plantes
OBS

Maladie des plantes causée par Didymella bryoniae, autrement connu sous le nom de Mycosphaerella citrullina (C.O.Sm.) Gross. et de Mycosphaerella melonis (Pass.) Chiu & Walker.

CONT

Mycosphaerella citrullina. (O.S. Smith) Grossman. Synonymes : M. melonis, M. cucumis, Didymella melonis. Forme pycnide Diplodina citrullina (O.S. Smith) Grossman, Syn. Ascochyta citrullina, Phyllosticta citrullina, Ascochyta melonis, Ascochyta cucumis.

CONT

Ce champignon (...) a été l'objet d'une abondante synonymie. (...) On peut observer des attaques sur tiges chez les plantes adultes. On voit apparaître des plages de couleur claire, où l'épiderme mort est ponctué de pycnides et de périthèces. (...) Ces lésions donnent ensuite lieu à un écoulement gommeux (d'où le nom de Gummy stem blight) (...)

Spanish

Save record 6

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