Peronospora rubi. [Descriptions of Fungi and Bacteria].

1989 ◽  
Author(s):  
G. Hall
Keyword(s):  
New Zealand ◽  
North America ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Systemic Disease ◽  
Interspecific Cross ◽  
Plant Diseases ◽  
Red Raspberry ◽  
Outer Cortex ◽  
Distribution Maps

Abstract A description is provided for Peronospora rubi. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Rubus arcticus, R. caesius, R. canadensis, R. canescens, R. chamaemorus, R. cissiburiensis, R. cissoides, R. corylifolius egg. (R. caesius × tereticaulis, R. nemorosus), R. flagellaris, R. fruticosus egg. (R. bregutiensis, R. buschi, R. glandulosus, R. hirtus, R. menkei, R. seebergensis, R. tereticaulis, R. vulgaris), R. idaeus, R. laciniatus, R. leucodermis, R. × loganobaccus (orursinus × ideaus), R. occidentalis, R. parviflorus, R. plicatus, R. procerus, R. spectabilis, R. strigosus, R. sulcatus, R. tuberculatus, R. villosus, R. vitifolius, and certain hybrids, e.g. 'Tayberry' (blackberry cv. Aurora × tetraploid red raspberry), 'Tummelberry' (a 'Tayberry' interspecific cross) and 'Youngberry'. DISEASE: Downy mildew of cane fruits (Rubus spp.), especially blackberry (R. fruticosus agg.), boysenberry (a blackberry × red raspberry cross: the name R. × loganobaccus covers this plant) and raspberry (R. idaeus). The fungus, an obligately biotrophic plant pathogen, occurs on leaves in summer to autumn, producing small, conspicuous, irregularly shaped patches on upper leaf surfaces, starting near the petiole, then following leaf veins. Patches are initially yellow, becoming carmine-red, vinaceous or purple and are bordered by venation. The undersurface of the leaf shows only a pale area with a brownish edge, and brownish discoloration near and alongside veins. Sporophores are sometimes difficult to detect in the dense mat of leaf hairs, but are heaviest on lowest leaves, close to ground level, forming a buff-grey felt. In wild-growing European species of Rubus the fungus occurs exclusively on the leaves. In North America it attacks leaves of cultivated raspberry bushes, and in New Zealand the fruits, sepals and pedicels of boysenberry, causing the fruit to become dry and shrivelled (dryberry disease). Downy mildew has recently become a problem on certain berry cultivars in Eastern England (McKeown, 1988). GEOGRAPHICAL DISTRIBUTION: Africa: South Africa. Asia: USSR (Azerbaijan). Australasia & Oceania: New Zealand. Europe: Czechoslovakia, Denmark, Finland, France, Germany (GFR, GDR), Norway, Poland, Rumania, Sweden, Switzerland, United Kingdom, USSR (Latvia). North America: Canada (British Columbia), USA (IL, MD, OR, WA, WI). See CMI Distribution Maps of Plant Diseases 598. TRANSMISSION: Determined for boysenberry in New Zealand only (61, 4245), where it is a systemic disease confined to the outer cortex parenchyma, keeping pace with cell division at apical meristems. Systemic cane infection is often indicated by red streaking of stems and petioles linking successively diseased leaves on a shoot. Unfolding leaves are invaded during warm wet weather causing typical leaf symtoms. Stores produced on diseased shoots initiate secondary infections of flowers and developing berries. These berries then become an important source of inoculum for new cycles of the disease. They go largely unnoticed, since spores are partially hidden on the split berry surfaces or covered by the sepals. After harvest, infection of developing primocanes continues by internal mycelial growth and spore infection. Oospores form on root surfaces in dead cortex cells and leaves. Soilborne oospores may infect healthy plants established in former sites of infected root crowns.

Valsa sordida. [Descriptions of Fungi and Bacteria].

1998 ◽  
Author(s):  
V. P. Hayova
Keyword(s):  
Czech Republic ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Environmental Stress ◽  
Geographical Distribution ◽  
Plant Diseases ◽  
Republic Of Georgia ◽  
Distribution Maps ◽  
Poplar Trees

Abstract A description is provided for Valsa sordida. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Valsa sordida is usually associated with Valsa canker of poplar twigs. Wounded trees, and trees injured by insects or attacked by other pathogens are more susceptible to infection. Development of Valsa canker is affected by environmental stress (Guyon, 1996; Tao et al., 1984). Poplar canker caused by V. sordida has been studied in different countries (CMI Distribution Maps of Plant Diseases, 1977; Worrall, 1983; Wang et al., 1981) The fungus can be often found in declining poplar stands together with another pathogen of poplar trees, Leucostoma niveum. Valsa sordida may also cause necrosis of willow twigs. HOSTS: Populus spp., Salix spp. and, more rarely, other woody angiosperms. GEOGRAPHICAL DISTRIBUTION: Africa: Morocco. Asia: Armenia, Azerbaijan, China, Republic of Georgia, India, Iran, Iraq, Israel, Japan. Kazakhstan, Korea, Russia (Tatarstan), Turkey, Turkmenia, Uzbekistan. Australasia: Australia (Victoria), New Zealand. Europe: Austria, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, France, Germany, Greece, Ireland, Italy, Netherlands, Norway, Poland, Portugal, Rumania, Russia, Slovakia, Sweden, Switzerland, UK, Ukraine, former Yugoslavia. North America: Canada (Alberta, British Columbia, Nova Scotia, Ontario, Québec, Saskatchewan). USA (California, Colorado, Michigan, Minnesota). South America: Chile. TRANSMISSION: Both conidia and ascospores are air-borne, especially under humid conditions. Yellow or orange exudation of conidia from conidiomata can be often seen after rain.

Gloeotinia granigena. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
M. A. J. Williams
Keyword(s):  
New Zealand ◽  
North America ◽  
Northern Ireland ◽  
Geographical Distribution ◽  
Lolium Perenne ◽  
Lolium Multiflorum ◽  
Plant Diseases ◽  
Fungal Mycelium ◽  
Distribution Maps ◽  
Pasture Grasses

Abstract A description is provided for Gloeotinia granigena. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Chief host: Lolium perenne, but also infects other pasture grasses including Lolium multiflorum, Lolium temulentum, Bromus spp., Elytrigia spp., Festuca spp., Secale cereale. DISEASE: Blind seed disease of ryegrass and other grasses. Once the grass flower is infected the endosperm is permeated by the fungal mycelium and the embryo is frequently killed, resulting in failure to germinate. GEOGRAPHICAL DISTRIBUTION: Australasia: Australia (NSW, SA, Tas., Vic.), New Zealand; Europe: Denmark, Eire, England, France, Germany, The Netherlands, Northern Ireland, Norway, Scotland, Sweden, USSR, Wales, North America: Canada (Quebec), USA (OR) (see CMI Distribution Maps of Plant Diseases, No. 315). TRANSMISSION: Fungus overwinters in fallen infected seed; apothecia produced in spring coincidentally with flowering of host plant; ascospores forcibly discharged and carried by air currents to open flowers. Macroconidia may also infect additional flowers.

Phytophthora pseudotsugae. [Descriptions of Fungi and Bacteria].

1989 ◽  
Author(s):  
G. Hall
Keyword(s):  
North America ◽  
Geographical Distribution ◽  
Pseudotsuga Menziesii ◽  
Plant Pathogen ◽  
Root Rot ◽  
Douglas Fir ◽  
Plant Diseases ◽  
Distribution Maps

Abstract A description is provided for Phytophthora pseudotsugae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Pseudotsuga menziesii. DISEASE: Root rot of Douglas fir; the fungus is a facultatively necrotrophic plant pathogen. GEOGRAPHICAL DISTRIBUTION: North America: USA (OR, WA). See CMI Distribution Maps of Plant Diseases 600. TRANSMISSION: Unknown. Presumably soil-borne by zoopores released in favourable conditions.

Peronospora violae. [Descriptions of Fungi and Bacteria].

1989 ◽  
Author(s):  
G. Hall
Keyword(s):  
United Kingdom ◽  
Downy Mildew ◽  
Geographical Distribution ◽  
Plant Pathogen ◽  
Colour Change ◽  
Plant Diseases ◽  
Distribution Maps ◽  
Early Stages ◽  
Water Splash

Abstract A description is provided for Peronospora violae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Viola acutifolia, V. arvensis, V. biflora, V. calarata, V. canina, V. cornuta, V. kitaibeliana, V. palustris, V. reichenbachiana, V. riviniana, V. silvestris, V. tricolor, V. tricolor var. arvensis, V. wittrockiana. DISEASE: Downy mildew of Viola spp. (violet and pansy); the fungus is an obligately biotrophic plant pathogen. In the early stages of the disease, a light covering of sporophores may be seen on the undersurface of individual leaves, unaccompanied by a colour change in the leaf. Later yellow patches appear on the upper surface of leaves covering a part of, or the whole lobe corresponding with patches of grey down on the leaf undersurface. Infected leaves eventually turn brown and die. Not all shoots are infected. Mildew first appears in October and progresses rapidly in November if the climate is mild and damp, or more slowly if dry. GEOGRAPHICAL DISTRIBUTION: Asia: USSR (Khazakhstan). Europe: Austria, Belgium, Czechoslovakia, Denmark, Finland, France, Germany (GDR, GFR), Hungary, Italy, Norway, Poland, Rumania, Sweden, Switzerland, United Kingdom, USSR (Estonia, Latvia, Russia, Ukraine, White Russia), Yugoslavia. See CMI Distribution Maps of Plant Diseases 599. TRANSMISSION: Boudier (1987) states that 'spectacular attacks of mildew follow sprinkler watering in dry autumn weather', suggesting that dispersal of spores may occur by a water splash mechanism. No other reports have been published.

Podosphaera leucotricha. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. N. Kapoor
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
Powdery Mildew ◽  
South America ◽  
Geographical Distribution ◽  
Prunus Persica ◽  
Podosphaera Leucotricha

Abstract A description is provided for Podosphaera leucotricha. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Malus spp., chiefly on M. pumila (apple), peach (Prunus persica), quince (Cydonia ualgaris) and Photinia spp. also attacked (Hirata, 1966). Also reported on almond fruit (43, 2544). DISEASE: Powdery mildew of apple. GEOGRAPHICAL DISTRIBUTION: Africa (? Kenya, Rhodaia, South Africa, Tanzania); Asia (China, India, Israel, Japan, U.S.S.R.); Australia and New Zealand, Europe (widely distributed) North America (Canada and U.S.A.); South America (Argentina, Brazil, Chile, Colombia, Peru). (CMI map 118). TRANSMISSION: Overwinters on host as dormant mycdium in blossom buds. The role of deistothecia in overwintering is doubtful. Spread by wind-borne conidia (Anderson, 1956).

Physoderma alfalfae. [Distribution map].

1973 ◽  
Author(s):  
Keyword(s):  
British Columbia ◽  
New Zealand ◽  
North America ◽  
South America ◽  
Medicago Sativa ◽  
Geographical Distribution ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Physoderma alfalfae (Pat. & Lagerh.) Karling. Hosts: Lucerne (Medicago sativa) and Medicago spp. Information is given on the geographical distribution in ASIA, India (Punjab), Iran, Israel, Pakistan, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Belgium, Britain, Cyprus, Czechoslovakia, Denmark, France, Germany, Greece, Italy, Netherlands, Portugal, Romania, Sweden, Switzerland, NORTH AMERICA, Canada (British Columbia), Mexico, USA, SOUTH AMERICA, Argentina, Chile, Ecuador, Peru.

Botrytis tulipae. [Distribution map].

1978 ◽  
Author(s):  
Keyword(s):  
New Zealand ◽  
North America ◽  
South America ◽  
Geographical Distribution ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Botrytis tulipae Lind. Hosts: on Tulip (Tulipa). Information is given on the geographical distribution in ASIA, Japan, Korea, Philippines, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Belgium, Britain (Jersey) (Guernsey), Bulgaria, Czechoslovakia, Denmark, Finland, France, Germany, Greece, Hungary, Italy, Netherlands, Norway, Portugal, Romania, Switzerland, USSR, Yugoslavia, NORTH AMERICA, Canada, USA, SOUTH AMERICA, Argentina, Chile.

Puccinia carthami. [Distribution map].

1977 ◽  
Author(s):  
Keyword(s):  
Saudi Arabia ◽  
New Zealand ◽  
North America ◽  
Geographical Distribution ◽  
Black Sea ◽  
Carthamus Tinctorius ◽  
Volga Region ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Puccinia carthami Corda. Hosts: Safflower (Carthamus tinctorius) and other C. spp. Information is given on the geographical distribution in AFRICA, Egypt, Ethiopia, Kenya, Morocco, Sudan, ASIA, Afghanistan, China (Kansu), India (Bihar, Delhi, Punjab), Iran, Iraq, Israel, Japan, Lebanon, Pakistan, Saudi Arabia, Syria, Turkey, USSR (Armenia, Azerbaijan, Turkmen SSR, Uzbek SSR, AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Cyprus, Czechoslovakia, France, Germany, Greece, Italy, Malta, Poland, Portugal, Romania, Spain, USSR (Black Sea, Volga Region), NORTH AMERICA, Canada, Mexico, USA.

Pyrenophora avenae. [Distribution map].

1976 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
Northern Ireland ◽  
South America ◽  
Geographical Distribution ◽  
Buenos Aires ◽  
Far East ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Pyrenophora avenae Ito & Kuribay. Hosts: Oats (Avena). Information is given on the geographical distribution in AFRICA, Angola, Egypt, Kenya, Malagasy Republic, Morocco, South Africa, ASIA, China (Kiangsu), India, Israel, Japan, Nepal, Pakistan, Taiwan, Turkey, USSR (Soviet Far East, Tashkent, Tomsk), AUSTRALASIA & OCEANIA, Australia, New Zealand, EUROPE, Austria, Britain & Northern Ireland, Bulgaria, Cyprus, Denmark, Finland, France, Germany, Irish Republic, Italy, Netherlands, Norway, Romania, Sweden, USSR (Latvia) (Byelorussia), NORTH AMERICA, Canada (general), USA (general), SOUTH AMERICA, Argentina (Buenos Aires), Brazil, Colombia, Guatemala.

Ceroplastes destructor. [Distribution map].

1960 ◽  
Author(s):  
Keyword(s):  
South Africa ◽  
New Zealand ◽  
North America ◽  
Geographical Distribution ◽  
Pacific Islands ◽  
New Guinea ◽  
Shade Trees ◽  
Distribution Map ◽  
Southern Rhodesia ◽  
New Distribution

Abstract A new distribution map is provided for Ceroplastes destructor Newst. (Homopt., Coccoidea) (White Wax Scale). Hosts: Citrus, coffee, various fruit and shade trees. Information is given on the geographical distribution in AFRICA, Bechuanaland, Congo, British Cameroons, Kenya, Madagascar, Nyasaland, San Thomé, Southern Rhodesia, Sudan, Tanganyika, Uganda, Union of South Africa, AUSTRALASIA and PACIFIC ISLANDS, Australia, New Guinea, New Zealand, NORTH AMERICA, Mexico, U.S.A.

Sign in / Sign up

Export Citation Format

Share Document