Erysiphe graminis. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. N. Kapoor
Keyword(s):  
Powdery Mildew ◽  
Geographical Distribution ◽  
World Wide ◽  
Erysiphe Graminis ◽  
Numerous Species ◽  
Initial Infection

Abstract A description is provided for Erysiphe graminis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On numerous species compasing over 100 genera of Gramineae, with the exception of the Maydeae, Andropogoneae, Zoysicae, Paniceae and Oryzeae (Dickson, 1956; Hirata, 1966). DISEASE: Powdery mildew of wheat, barley ant other cereals and grasses. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Initial infection by persistent mycelium and conidia on stubble or straw as well as on overwintered plants; ascospores from ovenvintered cleistothecia when formed, may also cause infection (Turner, 1956).

Erysiphe polygoni. [Descriptions of Fungi and Bacteria].

1976 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Powdery Mildew ◽  
Geographical Distribution ◽  
World Wide ◽  
Initial Infection ◽  
Erysiphe Polygoni

Abstract A description is provided for Erysiphe polygoni. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Polygonum and Rumex. DISEASE: Powdery mildew. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Initial infection is perhaps by persistent mycelium and wind-borne conidia. Ascospores from overwintered cleistothecia may also start new infections.

Erysiphe pisi. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. N. Kapoor
Keyword(s):  
Powdery Mildew ◽  
Geographical Distribution ◽  
Lens Culinaris ◽  
World Wide ◽  
Erysiphe Pisi ◽  
Lens Esculenta

Abstract A description is provided for Erysiphe pisi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Papilionaceae, chiefly on Pisum, Dorcynium, Medicago and Vicia; also on Lupinus spp., Lens esculenta[Lens culinaris], Trifolium dubium and? Astragalus alpinus (Blumer, 1967). DISEASE: Powdery mildew of pea. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Internally seed borne (15: 338).

Microsphaera penicillata. [Descriptions of Fungi and Bacteria].

1968 ◽  
Author(s):  
K. G. Mukerji
Keyword(s):  
North America ◽  
Powdery Mildew ◽  
Geographical Distribution ◽  
World Wide ◽  
Late Summer ◽  
Erysiphe Pisi ◽  
Temperature And Humidity ◽  
Young Leaves ◽  
Dry Seasons

Abstract A description is provided for Microsphaera penicillata. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On species of Alnus, Betula, Syringa, Lathyrus, sweet peas and numerous other hosts (Saknon, 1900; Stevens, 1925; 39: 739; 41: 175) DISEASES: Powdery mildew of alder and lilac. Forms a white to grey floury appearance on the surface of broad leaves of many hard wood trees. It is more prevalent on sweet peas than Erysiphe pisi (CMI Descript. 155) in North America in spring when temperature and humidity are fluctuating. The foliage may be malformed, dropping prematurely or drying out and shrivelling. It is also prevalent on lilac in late summer and autumn, sometimes in dry seasons almost completely covering the foliage, but generally too late in the season to cause serious damage. Young leaves are more susceptible. GEOGRAPHICAL DISTRIBUTION: World-wide on alder and lilac and occasionally occurring on numerous other hosts. Distributed generally in North America and Europe, also reported from Chile, China, India and Japan (Salmon, 1900, 39: 739; 41: 175). TRANSMISSION: Spores wind borne.

Sphaerotheca fuliginea. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. N. Kapoor
Keyword(s):  
Glycine Max ◽  
Powdery Mildew ◽  
Geographical Distribution ◽  
World Wide ◽  
Solanum Melongena ◽  
Sphaerotheca Fuliginea ◽  
Hibiscus Esculentus

Abstract A description is provided for Sphaerotheca fuliginea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On numerous genera of Compositae, Cucurbitaceae and Scrophulariaceae. Also on Helianthemum spp. (Cistaceae); Arabis spp., Braya spp., Capscila spp., Cardaminc spp., Draba spp., Parrya spp. (Cruciferae); Dipsacus spp. (Dipsacaceae); Astragalu, spp., Glycine max, Phascolus spp., Rhynchosia spp., Vigna spp.(Leguminosae); Plantago spp. (Plantaginaceae); Hibiscus esculentus (Malvaceae); Hyoscyarnus niger, Mandragora officinalis, Petunia spp., Physalis spp., Solanum melongena (Solanaceae). (Blumer, 1967; Hirata, 1966). DISEASE: Powdery mildew of cucurbits. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Not known.

Leveillula taurica. [Descriptions of Fungi and Bacteria].

1968 ◽  
Author(s):  
K. G. Mukerji
Keyword(s):  
Powdery Mildew ◽  
Geographical Distribution ◽  
Central Europe ◽  
Mediterranean Region ◽  
World Wide ◽  
Near East ◽  
Gossypium Barbadense ◽  
Cyamopsis Tetragonoloba ◽  
Leveillula Taurica ◽  
Trees And Shrubs

Abstract A description is provided for Leveillula taurica. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Gossypium barbadense, G. hirsutum and Cyamopsis psoraloides[Cyamopsis tetragonoloba]. Also on many other trees and shrubs belonging to the Leguminoseae, Malvaceae and Euphorbiaceae (Salmon, 1900; Blumer, 1933; Tarr, 1955; 37: 521). DISEASES: Powdery mildew of cotton and guar. The host becomes completely covered with the fungus which mostly forms conidia and rarely cleistothecia. Severe attacks cause defoliation. Komarov (1895) reported that in Seravschan-Turkestan every plant of the steppes up to 1219-1524 m is attacked. The fungus does not occur beyond 1829 m. GEOGRAPHICAL DISTRIBUTION: World wide but mainly in the mediterranean region, Central Europe and the Near East (Dennis, 1960; CMI Map 217; 37: 400). TRANSMISSION: Wind borne. In the Sudan the pathogen over-summers on Euphorbia heterophylla, a common weed (37: 521).

Uncinula necator. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. N. Kapoor
Keyword(s):  
Powdery Mildew ◽  
Vitis Vinifera ◽  
Geographical Distribution ◽  
World Wide ◽  
Uncinula Necator

Abstract A description is provided for Uncinula necator. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Vitis spp., chiefly Vitis vinifera; also on Parthenocissus spp., Ampelopsis spp. DISEASE: Powdery mildew of vine. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Conidia and mycelium overwinter in diseased buds, fallen berries or on overwintered stems. Cleistothecia, when formed, are capable of overwintering (Blumer, 1967).

Erysiphe cruciferarum. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
T. J. Purnell
Keyword(s):  
Powdery Mildew ◽  
Geographical Distribution ◽  
World Wide ◽  
Erysiphe Cruciferarum ◽  
White Mycelium

Abstract A description is provided for Erysiphe cruciferarum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Chiefly on members of the Cruciferae but also reported on Papaveraceae (Junell, 1961). DISEASE: Powdery mildew of swedes and tumips. The first signs of mildew consist of small patches of a thin white mycelium arising at various places on the leaf, often appearing first on the under surface. These soon merge forming larger areas of mycelium. The leaves of the swede, B. napus, may support heavy mildew growth for many weeks before they become chlorotic and die. GEOGRAPHICAL DISTRIBUTION: World-wide. TRANSMISSION: Wind-borne conidia. The method of ovewintering is uncertain but myelium may be able to survive on winter Brassica spp. in the form of 'subinfections' (Searle, 1919).

Cloning and Characterization of a Novel Wheat Glycoside Hydrolase Gene TaGlc2 Induced by Powdery Mildew Pathogen (Erysiphe graminis) Infection

2009 ◽  
Vol 35 (5) ◽  
pp. 786-794
Author(s):  
N PUDAKE Ramesh ◽  
Ming-Ming XIN ◽  
Yu-Jing YIN ◽  
Chao-Jie XIE ◽  
Zhong-Fu NI ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Glycoside Hydrolase ◽  
Erysiphe Graminis ◽  
Powdery Mildew Pathogen

Changes in sterol composition with ontogeny of Blumeria graminis conidia

2000 ◽  
Vol 78 (10) ◽  
pp. 1288-1293 ◽  
Author(s):  
Jérôme Muchembled ◽  
Anissa Lounès-Hadj Sahraoui ◽  
Anne Grandmougin-Ferjani ◽  
Michel Sancholle
Keyword(s):  
Powdery Mildew ◽  
Plant Pathogen ◽  
Total Sterol ◽  
Sterol Composition ◽  
Blumeria Graminis ◽  
Erysiphe Graminis ◽  
Qualitative And Quantitative ◽  
Wheat Powdery Mildew

The total sterol composition of conidia of the obligate plant pathogen Blumeria (= Erysiphe) graminis f.sp. tritici has been analysed as a function of their ontogeny during sporulation. Two main classes of sterols were characterized: 24-ethylsterols (24-ethylcholesta-5,22-dienol, 24-ethylcholesterol, and Δ5-avenasterol) and 24-methylsterols (24-methylenecholesterol and episterol). Our results show that sterol composition is greatly modified during ontogeny of B. graminis conidia both at the qualitative and quantitative levels. In particular, 24-methylsterols, e.g., 24-methylenecholesterol and episterol, are the major sterols in old conidia whereas 24-ethylsterols, e.g., 24-ethylcholesta-5,22-dienol, 24-ethylcholesterol, and Δ5-avenasterol, are the main sterols in young conidia.Key words: Erysiphe, wheat powdery mildew, sterols, ontogeny.

Sign in / Sign up

Export Citation Format

Share Document