Podosphaera clandestina. [Descriptions of Fungi and Bacteria].

1975 ◽  
Author(s):  
S. M. Khairi
Keyword(s):  
Host Plant ◽  
Geographical Distribution ◽  
Secondary Infection ◽  
Pyrus Communis ◽  
Crataegus Monogyna ◽  
Terminal Buds

Abstract A description is provided for Podosphaera clandestina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Crataegus monogyna, C. pentagyna, C. punctata, Mespilus germanica, Cratoegomespilus grandiflora, C. dardari, Pyrus communis, Cydonia vulgaris, Pyrocydonia winkleri and P. danieli. DISEASE: Hawthorn mildew. Severe attacks cause defoliation and death of terminal buds on young seedlings and on soft shoots on hedges and trees. The disease has been recorded on hawthorn fruits. The host plant can be grown only from seeds. GEOGRAPHICAL DISTRIBUTION: Worldwide (Salmon, 1900; 45, 3081). Cleistothecia play no part in the disease in England. The overwintering mycelium, inside infected buds, survives until the following spring. These infected buds are the primary infections found each year. Secondary infection is by air-borne conidia.

Gibberella zeae. [Descriptions of Fungi and Bacteria].

1973 ◽  
Author(s):  
C. Booth
Keyword(s):  
Geographical Distribution ◽  
Secondary Infection ◽  
Brown Rot ◽  
Gibberella Zeae ◽  
Infested Soil ◽  
Foot Rot ◽  
Seedling Blight ◽  
Water Droplets ◽  
Ascospore Discharge ◽  
The Tropics

Abstract A description is provided for Gibberella zeae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Wheat, maize, barley, carnations and other ornamentals; also reported infecting Lycopersicon, Pisum, Trifolium and Solanum DISEASE: Seedling blight, pre-emergence and post-emergence blight, root and foot rot, brown rot, culm decay, head or kernel blight (scab or ear scab) of wheat, maize, barley and other cereals. Leaf and flower rot of carnations and other ornamentals. Also reported infecting species of Lycopersicon, Pisum, Trifolium and Solanum. GEOGRAPHICAL DISTRIBUTION: Worldwide on maize and rice in the tropics. Wheat, oats, barley and rye in temperate regions. TRANSMISSION: By planting infected or infested seeds or by planting in infested soil. Secondary infection occurs widely by water droplets under moist conditions or by ascospore discharge.

Puccinia levis var. brachiariae. [Descriptions of Fungi and Bacteria].

2009 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Host Plant ◽  
Geographical Distribution ◽  
Conservation Status ◽  
Leaf Lamina ◽  
Brachiaria Brizantha ◽  
Urochloa Decumbens ◽  
Urochloa Brizantha

Abstract A description is provided for Puccinia levis var. brachiariae comb. nov., which causes small lesions on young stems and leaf lamina of the host plant and, where present in quantity, could significantly reduce vigour. Some information on its dispersal and transmission and conservation status is given, along with details of its geographical distribution (Malawi, Uganda, Zambia and Brazil) and hosts (Brachiaria brizantha [Urochloa brizantha], B. decumbens [Urochloa decumbens], B. humidicola [Urochloa humidicola] and an unnamed Brachiaria sp.).

Venturia pirina. [Descriptions of Fungi and Bacteria].

1974 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Leaf Litter ◽  
Geographical Distribution ◽  
Primary Infection ◽  
Secondary Infection ◽  
Apple Scab ◽  
Black Spot ◽  
Eriobotrya Japonica ◽  
Venturia Pirina ◽  
Young Growth

Abstract A description is provided for Venturia pirina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Principally on pear (Pyrus communis) and other Pyrus spp., also recorded from Eriobotrya japonica (loquat) (Herb. IMI). DISEASE: Causes scab or black spot of pear, which results in loss of quantity and quality of fruit. The disease attacks shoots, buds, leaves and fruit, symptoms and aetiology being very similar to those of apple scab caused by V. inaequalis on Malus spp. (CMI Descript. 401). Dark, more or less circular scabs are produced on leaves and fruit, often with some growth distortion. Infection of young wood is more common than with apple scab and causes pale brown blister-like lesions which burst to release conidia in the following year. GEOGRAPHICAL DISTRIBUTION: Worldwide in temperate and subtropical regions wherever pears are grown (see CMI Map 367, ed. 2, 1968). TRANSMISSION: Epidemiology is similar to that of apple scab. The overwintering saprophytic perithecial stage on leaf litter releases airborne ascospores in spring which infect young growth, and secondary infection by conidia dispersed during wet summer weather also occurs. Overwintering lesions on young wood are more frequent than with apple scab and conidia produced by these in the spring can be an important source of primary infection (46, 2061; 47, 849).

Gymnosporangium globosum. [Distribution map].

1989 ◽  
Author(s):  
Keyword(s):  
North America ◽  
South Dakota ◽  
North Dakota ◽  
Geographical Distribution ◽  
Pyrus Communis ◽  
Malus Pumila ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Gymnosporangium globosum Farlow. Hosts: Apple (Malus pumila), pear (Pyrus communis), Crataegus & Juniperus). Information is given on the geographical distribution in North America, Canada, Ontario, Quebec, Saskatchewan, Mexico, USA, Colorado, North Dakota, South Dakota, Nebraska, Oklahoma, Texas, AK.

Pyrenophora graminea. [Descriptions of Fungi and Bacteria].

1973 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Geographical Distribution ◽  
Secondary Infection ◽  
Diseased Plant ◽  
Grain Production ◽  
Leaf Stripe ◽  
The World ◽  
Pyrenophora Graminea ◽  
Leaf Shedding ◽  
Dry Out ◽  
Seedling Infection

Abstract A description is provided for Pyrenophora graminea. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Barley and other Hordeum spp. Also, occasionally, on oats, wheat and rye. DISEASE: Causes leaf stripe of barley. Severe seedling infection can cause stunting and post-emergence death, but symptoms are not usually apparent until later, when long, chlorotic or yellow stripes on leaves and sheaths appear. Most leaves of a diseased plant are usually affected. Dark brown streaks develop later in the stripes, which eventually dry out and cause leaf shedding. Ears may not emerge or be deformed and discoloured. Grain production by infected plants is severely restricted. GEOGRAPHICAL DISTRIBUTION: Widespread distribution; occurs in most barley-growing areas of the world. TRANSMISSION: Seed-borne (49, 1342) usually by mycelium in the pericarp. Perithecia are uncommon, but overwintering sclerotia on crop debris have been reported from Russia (42, 13). Secondary infection by conidia is apparently important only for floral infection and subsequent seed contamination.

Prays citri. [Distribution map].

1982 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
Host Plant ◽  
Geographical Distribution ◽  
Canary Islands ◽  
Distribution Map ◽  
Prays Citri ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Prays citri (Mill.) (Lepid., Yponomeutidae) (Citrus Flower Moth). Host Plant: Citrus. Information is given on the geographical distribution in EUROPE, Corsica, Dodecanese Islands, France, Greece, Italy, Malta, Portugal, Sardinia, Sicily, Spain, ASIA, Cyprus, Israel, Lebanon, Turkey, AFRICA, Algeria, Canary Islands, Egypt, Libya, Madeira, Mauritius, Morocco, Seychelles, South Africa, Tunisia, Zimbabwe.

Thecaphora lathyri. [Descriptions of Fungi and Bacteria].

2020 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
North America ◽  
Host Plant ◽  
Geographical Distribution ◽  
Conservation Status ◽  
External View ◽  
East Kazakhstan ◽  
Spore Mass

Abstract A description is provided for Thecaphora lathyri, found in dead fruits of the host plant (Lathyrus pratensis), infecting and destroying the seeds, the spore mass granular, dark chestnut brown, ± completely filling the fruit cavity; host fruits somewhat swollen in external view, but otherwise not visibly affected. Some information on its associated organisms and substrata, dispersal and transmission, habitats and conservation status is given, along with details of its geographical distribution (North America (USA (Utah)), Asia (Kazakhstan (East Kazakhstan), Russia (Altai)), Europe (Finland, Germany, Italy, Switzerland, UK)).

Megastigmus spermotrophus. [Distribution map].

1977 ◽  
Author(s):  
Keyword(s):  
New Zealand ◽  
North America ◽  
Host Plant ◽  
Geographical Distribution ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Distribution Map ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Megastigmus spermotrophus(Wachtl.) (Hymenopt., Torymidae) (Douglas Fir Seed-Fly). Host Plant: Pseudotsuga menziesii. Information is given on the geographical distribution in EUROPE, Austria, Belgium, Britain, Czechoslovakia, Denmark, France, Germany, Hungary, Ireland, Netherlands, Poland, Yugoslavia, AUSTRALASIA, New Zealand, NORTH AMERICA, Canada, U.S.A.

Corollospora pseudopulchella. [Descriptions of Fungi and Bacteria].

2009 ◽  
Author(s):  
D. I. Enríquez
Keyword(s):  
Puerto Rico ◽  
Dominican Republic ◽  
Host Plant ◽  
Geographical Distribution ◽  
Thalassia Testudinum

Abstract A description is provided for Corollospora pseudopulchella. Information on the host plant (Thalassia testudinum), geographical distribution (Mexico, Japan, Thailand, Cuba, Dominican Republic, Puerto Rico and Denmark), and dispersal and transmission of the pathogen is presented.

Gymnosporangium confusum. [Descriptions of Fungi and Bacteria].

1977 ◽  
Author(s):  
G. Laundon
Keyword(s):  
Geographical Distribution ◽  
Pyrus Communis ◽  
Japanese Quince

Abstract A description is provided for Gymnosporangium confusum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Aecia on hawthorn (Crataegus), European quince (Cydonia vulgaris), Japanese quince (Chaenomeles japonica) and medlar (Mespilus germanica); also on Cotoneaster and Sorbus, and occasionally weak infections on pear (Pyrus communis). Telia on junipers of both the 'oxycedrus' and 'sabina' groups. DISEASE: Medlar rust. Aecia chiefly on the leaves but also on stems, calyces and fruit. Telia on slight fusiform swellings of twigs and branches of juniper. GEOGRAPHICAL DISTRIBUTION: Widespread throughout Europe, extending into Asia (India, Iran, Lebanon, Pakistan, Turkey, USSR) and Africa (Algeria, Morocco, Tunisia). Also established in USA (California) (CMI Map 429, ed. 1, 1967).

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