Corticium rolfsii. [Descriptions of Fungi and Bacteria].

1974 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Geographical Distribution ◽  
Disease Transmission ◽  
Crop Residues ◽  
Cultural Practices ◽  
Ornamental Plants ◽  
Crown Rot ◽  
Perfect State ◽  
Surface Layers ◽  
Weed Hosts ◽  
Facultative Parasite

Abstract A description is provided for Corticium rolfsii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Arachis, Phaseolus and many other legumes, Beta, Brassica, Cannabis, Cinchona, Citrus, Cucumis, Ficus, Lycopersicon, Musa, Oryza, Solanum, Saccharum and a wide variety of other crops, ornamental plants and weeds. DISEASE: Stem rot, foot rot, crown rot, sclerotium wilt, blight. Infection commonly commences at about soil level and extends a few cm above and below. Epidermis, cortex and stele are all invaded; necrosis precedes penetration. GEOGRAPHICAL DISTRIBUTION: Widespread in moist tropics and warm temperate areas; present in most of Africa and southern Asia; Australasia; Spain, Italy and through central Europe to southern Sweden; North America (particularly important in southern USA), Central America and the West Indies and much of S. America (CMI Map 311, ed. 3, 1969). TRANSMISSION: A facultative parasite, capable of extensive saprophytic growth in surface layers of soil. Persists on crop residues and weed hosts. The sclerotia are disseminated by cultural practices, wind and water; a proportion survive passage through sheep and cattle. They occur as contaminants amongst seed and the fungus is occasionally seed-borne, e.g. in groundnut and watermelon, or present on vegetative propagation material. The perfect state is infrequent in the field and is probably not of primary importance in disease transmission.

Phoma sorghina. [Descriptions of Fungi and Bacteria].

1985 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Solomon Islands ◽  
Stem Canker ◽  
Crown Rot ◽  
Irian Jaya ◽  
Weed Hosts ◽  
A Minor

Abstract A description is provided for Phoma sorghina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Gramineae and all kinds of plants. Also isolated from soil, air and various animal sources. DISEASE: A minor leaf spot of cereals and grasses. The visible symptoms vary considerably; on sorghum leaves spots are usually irregular or rounded, yellowish-brown or grey with definite reddish-purple margins or indefinite in outline, reaching 1 cm or more in width. Pycnidia develop within spots on leaves, glumes and seeds. Also the fungus has been implicated with pre- and post-emergence death of seedlings of Macroptilium and Sylosanthes species (54, 1779) crown rot of bananas (61, 3556), leaf spot of Agave americana and stem rot of Euphorbia tirucalli (63, 3383), brown stem canker of Leucosperum cordifolium (56, 253). GEOGRAPHICAL DISTRIBUTION: A ubiquitous fungus occurring in tropical and subtropical regions. Africa (Botswana, Cameroon, Egypt, Ethiopia, Gambia, Kenya, Malawi, Mauritius, Mozambique, Nigeria, Senegal, Sierra Leone, South Africa, Sudan, Tanzania, Togo, Uganda, Zaire, Zambia, Zimbabwe); Asia (Bangladesh, Brunei, Burma, China, Hong Kong, India, Indonesia (Irian Jaya), Laos, Malaysia, Nepal, Pakistan, Saudi Arabia, Sri Lanka, Taiwan, USSR); Australasia and Oceania (Australia, Hawaii, New Zealand, Papua New Guinea, Solomon Islands); Europe (Germany, Portugal, Italy, UK); North America (Canada, USA); Central America and West Indies (Antigua, Guatemala, Honduras, Jamaica, Nicaragua, Puerto Rico, Trinidad); South America (Argentina, Bolivia, Brazil, Colombia). TRANSMISSION: Probably by contaminated seed; the fungus has been found on or isolated from several seed samples (1, 289; 33, 599; 47, 2153; 54, 1779; 60, 367; 61, 4102). In Taiwan P. sorghina has been found to be transmitted from seed to seedlings (62, 4281). The fungus has also been claimed to persist on trash and weed hosts and remain viable up to 1 yr but lose its viability after 2 yr storage on dry infected leaves (Koch & Rumbold, 1921).

Colletotrichum graminicola. [Descriptions of Fungi and Bacteria].

1967 ◽  
Author(s):  
J. Elizabeth
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Crop Residues ◽  
New Caledonia ◽  
Red Clover ◽  
Colletotrichum Graminicola ◽  
Seedling Blight ◽  
Stalk Rot ◽  
Weed Hosts ◽  
New Hebrides

Abstract A description is provided for Colletotrichum graminicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Sorghum vulgare[Sorghum bicolor] and its varieties, S. halepensis, Zea, Triticum, Secale and other cultivated and wild genera distributed amongst at least 8 of the 12 tribes of Gramineae (Wilson 1914; Sprague, 1950). Also recorded on lucerne, red clover, soyabean and sweet clover (41: 368; 35: 300; 30: 598). DISEASES: Red stalk rot of internodal stem tissues, anthracnose and red leaf spot, also seedling blight of sorghum. On maize, cereals and other grasses the leaf spot form is most frequently seen, the spots are elliptical to elongated, usually 1-2 cm but occasionally confluent particularly on the midrib, pale orange to blackish purple, the centres greyish with age. Leaf anthracnose and stalk rots are characterized by the reddish discolouration, but pigmentation varies greatly according to host. Root rot is also recorded. GEOGRAPHICAL DISTRIBUTION: Africa (Ethiopia, Ghana, Guinea, Kenya, Libya, Malawi, Mauritius, Nigeria, Rhodesia, Sierra Leone, Sudan, Tanzania, Togoland, Uganda, Zambia); Asia (Burma, Hong Kong, India, Malaysia, Nepal, Pakistan); Australasia & Oceania (Australia, New Caledonia, New Hebrides, New Zealand), Europe (Finland, Germany, Great Britain, Rumania); North America (Canada, U.S.A.); Central America & West Indies (Cuba, Trinidad); South America (Argentina, Brazil, Chile, Guyana). TRANSMISSION: Seasonal persistence is on infected crop residues and weed hosts; sporulation has been observed on sorghum stalks and stubble after overwintering in the field (Le Beau et al., 1951). Also seed transmitted (35: 653).

Peronospora dianthicola. [Descriptions of Fungi and Bacteria].

1983 ◽  
Author(s):  
S. M. Francis
Keyword(s):  
Downy Mildew ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Dianthus Caryophyllus ◽  
Weather Conditions ◽  
Axillary Buds ◽  
Pseudoperonospora Humuli ◽  
Resistant Varieties ◽  
Weed Hosts ◽  
Pale Green

Abstract A description is provided for Peronospora dianthicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOST: Dianthus caryophyllus. DISEASE: Downy mildew of carnation. Early symptoms are seen on the leaves which have pale green to yellowish transverse bands and may bend at these lesions. Infected plants are stunted and become withered. Infection of the growing point may result in the development of axillary buds giving the plants a bushy appearance. Barthelet describes the shoots which can develop in some resistant varieties as resembling the basal spikes of Pseudoperonospora humuli on hops, i.e., shoots with smaller leaves, thickened stem and shortened internodes. GEOGRAPHICAL DISTRIBUTION: Europe (Britain*, Denmark, France, Greece, Turkey); N. America (California, USA); S. America (Colombia). *no herbarium material, but recorded by F.A. Mason, The Naturalist no. 848: 270, 1927; on leaves of carnation under glass, Duncombe Park, Helmsley, Yorks. (Sept. 1920). TRANSMISSION: Oospores, which are formed abundantly in the tissues of diseased plants, are thought to be important in disease transmission. A small amount of infection is often seen on the plants in the autumn and these foci can allow the pathogen to overwinter until more favourable weather conditions permit the spread of the disease the following spring. Possible weed hosts for the pathogen such as Cerastium and Stellaria, growing in the vicinity, were examined and found to be infected with a different species of Peronospora belonging to the P. alsinearum group (33, 230).

Thanatephorus cucumeris. [Descriptions of Fungi and Bacteria].

1974 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Geographical Distribution ◽  
Crop Residues ◽  
Leaf Roll ◽  
Stem Canker ◽  
Fruit Rot ◽  
Arable Soils ◽  
Thanatephorus Cucumeris ◽  
Mycorrhizal Association ◽  
Weed Hosts ◽  
Extensive Growth

Abstract A description is provided for Thanatephorus cucumeris. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Economically important on bean, beet, cabbage, cotton, pine, potato and tomato; infects wheat and turf grasses and is locally or seasonally important on over 250 other plants. It is doubtful whether any crop can be regarded as resistant to all strains. A mycorrhizal association is formed with some orchids. DISEASE: Early infection gives rise to seed decay and pre-emergence and post-emergence damping-off, later infection to stem canker, wire-stem, eyespot and other diseases which result from decay of stem cortex and may be accompanied by stunting, yellowing and leaf roll symptoms. Other diseases are rot of organs in contact with soil, web, leaf and thread blights, fruit rot, root rot and storage rots and blemishes. Sites susceptible to infection are generally more restricted with increasing maturity of the host. GEOGRAPHICAL DISTRIBUTION: Worldwide. Probably present in all arable soils and has been isolated from virgin soils. Little is known of distribution of individual strains. TRANSMISSION: Primarily soil-borne. Capable of extensive growth through soil and survives in the form of sclerotia and on crop residues and weed hosts. Inoculum is spread during vegetative propagation (e.g. on potato tubers) and can be seed-borne. Basidiospores are reported to initiate a leaf spot of Hevea (48, 271) but their role in transmission of other diseases has not been studied extensively.

Microsphaera palczewskii. [Descriptions of Fungi and Bacteria].

1998 ◽  
Author(s):  
V. P. Heluta
Keyword(s):  
Geographical Distribution ◽  
Disease Transmission ◽  
Russian Far East ◽  
Ornamental Plants ◽  
Far East ◽  
European Part ◽  
Southern Siberia ◽  
Initial Stage ◽  
Caragana Arborescens

Abstract A description is provided for Microsphaera palczewskii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Powdery mildew of ornamental plants. Mycelium, conidiophores, conidia and ascomata form a covering of damaged green parts of the host which is first white, then dirty-grey. Infected part lose their shape. If infection levels are high, the plants may lose their ornamental qualities. HOSTS: Caragana arborescens, C. boisii, C. brevispina, C. decorticans, C. fruticosa, C. manchurica, C. microphylla, C. mollis, C. spinosa, C. ussuriensis, Robinia pseudacacia. [Type species - Caragana arborescens] GEOGRAPHICAL DISTRIBUTION: Asia (temperate areas only): China, Kazakhstan, Russia (Altai, Russian far east, southern Siberia), Turkmenistan. Europe (introduced): Belarus, Germany, Latvia, Lithuania, Poland, Rumania, Russia (European part), Slovakia, Spain, Sweden, Ukraine. TRANSMISSION: By wind-dispersed conidia. The rôle of ascospores in disease transmission is unknown, although it has been supposed that they can cause the initial stage of the disease. Infection can however also be through colonies surviving in host buds.

Arthrocladiella mougeotii. [Descriptions of Fungi and Bacteria].

1998 ◽  
Author(s):  
V. P. Heluta
Keyword(s):  
Czech Republic ◽  
Geographical Distribution ◽  
Disease Transmission ◽  
Russian Far East ◽  
Far East ◽  
Republic Of Georgia ◽  
Lycium Barbarum ◽  
Initial Stage ◽  
High Infection

Abstract A description is provided for Arthrocladiella mougeotii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. DISEASE: Powdery mildew of Lycium species only. The mycelium, conidiophores, conidia and ascomata form first white, then dirty-grey patches on damaged green parts of the host. Infected parts are deformed slightly and, in cases of high infection, plants can lose their ornamental qualities. Damaged leaves can fall prematurely. HOSTS: Lycium barbarum (= L. europaeum), L. chinense, L. dasystemum, L. halimifolium, L. ovatum, L. potaninii, L. rhombifolium, L. ruthenicum. [Type host - Lycium barbarum] GEOGRAPHICAL DISTRIBUTION: Africa: Canary Islands. Asia (temperate areas only): Armenia, Azerbaijan, China, Republic of Georgia, Israel, Japan, Kazakhstan, Kirghizistan, Korea, Russia (Russian far east), Tadzhikistan, Taiwan, Turkey, Turkmenistan, Uzbekistan. Australasia: New Zealand (introduced). Europe: Austria, Belgium, Bulgaria, Czech Republic, Estonia, France, Germany, Hungary, Italy, Netherlands, Norway, Poland, Rumania, Slovakia, Sweden, Switzerland, UK, Ukraine (southern), former Yugoslavia. North America: USA (introduced). TRANSMISSION: By wind-dispersed conidia. The rôle of ascospores in disease transmission is unknown, although it has been supposed that they can cause the initial stage of the disease.

Ascochyta desmazieresii. [Descriptions of Fungi and Bacteria].

1980 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Geographical Distribution ◽  
Leaf Spot ◽  
Crop Residues ◽  
Lolium Multiflorum ◽  
Leaf Tissue ◽  
Lower Side ◽  
Soil P ◽  
Wet Weather ◽  
Irish Republic

Abstract A description is provided for Ascochyta desmazieresii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lolium multiflorum and L. perenne. DISEASE: Glume and leaf spot of Italian and perennial ryegrasses. At first leaf lesions start as small purplish or chocolate-brown spots with a distinct red-purple margin. With time these enlarge, become irregular or elliptical, up to 5 mm long and distinctly visible on both sides of the leaves. Finally the centres of older lesions fade to fawn to straw yellow with numerous pycnidia immersed within the leaf tissue on both sides of the leaves but usually abundant pycnidia occur on the lower side. GEOGRAPHICAL DISTRIBUTION: Asia (Japan); Europe (Belgium, Czechoslovakia, Denmark, France, Irish Republic, UK); N. America (USA, California, Oregon, Washington); S. America (Chile, Brazil). TRANSMISSION: No specific studies reported; infection is presumably spread by air-borne conidia in wet weather or heavy dews. The fungus is also probably carried over on crop residues and debris in soil.

Hungarian sainfoin and its ecological value for agriculture

2021 ◽  
pp. 21-25
Author(s):  
В.А. Волошин ◽  
Г.П. Майсак ◽  
Л.С. Терентьева
Keyword(s):  
Crop Residues ◽  
Trifolium Pratense ◽  
Cultural Practices ◽  
Perennial Grasses ◽  
Organic Fertilizers ◽  
Natural Ecosystems ◽  
Ecological Value ◽  
Deep Soil ◽  
Melilotus Albus ◽  
Trifolium Pratense L

В последние годы в Пермском крае прекратилось известкование кислых почв, недостаточно вносятся минеральные и органические удобрения. Всё это постепенно привело к снижению плодородия почв. Избежать или снизить влияние негативных явлений можно за счёт использования многолетних трав. Перспективной фитомелиоративной культурой является эспарцет песчаный (Onobrychis arenaria (Kit.) Ser.), который ранее в Пермском крае не возделывался, но встречается в естественных фитоценозах ряда районов края. Целью настоящей работы является поиск и обобщение научной информации по морфо-биологическим особенностям и агроэкологической роли эспарцета песчаного в земледелии. В статье приведён литературный обзор биологических особенностей этой культуры: азотфиксации, накопления пожнивно-корневых остатков, формирования корневой системы эспарцета песчаного в различных регионах его возделывания. Для сравнения приведены экспериментальные данные ряда исследователей, полученные в Пермском крае при изучении клевера лугового (Trifolium pratense L.), люцерны изменчивой (Medicago×varia Mart.), донника белого (Melilotus albus Medik.). Эспарцет песчаный за счёт корневых выделений способен усваивать из глубоких горизонтов почвы труднодоступные для других культур кальциевые и фосфорные соединения и обогащать ими верхний горизонт почвы, то есть он может выступать в роли биологического мелиоранта. На опытном поле Пермского НИИСХ эспарцет песчаный изучался с 2011 по 2019 год и зарекомендовал себя как перспективная кормовая культура. Изучение его особенностей с целью разработки технологий возделывания и использования целесообразно продолжить и расширить. Over the last years, liming of acidic soils stopped in the Perm Territory; mineral and organic fertilizers are not applied sufficiently. All this gradually led to a decrease in soil fertility. It is possible to avoid or reduce the influence of negative factors by planting perennial grasses. Hungarian sainfoin (Onobrychis arenaria (Kit.) Ser.) is a promising phytomeliorative crop for the Perm Territory. It was not previously cultivated there, but it is found in natural ecosystems in a number of locations. The investigation aimed at reviewing morphology, biology and ecological value of Hungarian sainfoin. The article deals with its biological features: nitrogen fixation, accumulation of crop residues as well as root system formation in various regions. To compare sainfoin with other crops in the Perm Territory, the article provides the experimental data on red clover (Trifolium pratense L.), alfalfa (Medicago×varia Mart.), and white melilot (Melilotus albus Medik.). Due to root secretions, Hungarian sainfoin is able to assimilate calcium and phosphorus from deep soil that are unavailable for other crops. So, the crop can enrich the upper soil layers with these elements, being a biological ameliorant. Studied during 2011–2019 on the trial field of the Perm Research Institute of Agriculture, Hungarian sainfoin was shown to be a promising forage crop. Its further investigation as well as development of efficient cultural practices is of high value.

Daldinia eschscholzii. [Descriptions of Fungi and Bacteria].

2006 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Geographical Distribution ◽  
Disease Transmission ◽  
Host Plants

Abstract This paper describes Daldinia eschscholzii and includes information on its taxonomy, the diseases caused, host plants, geographical distribution, and disease transmission.

Cochliobolus verruculosus. [Descriptions of Fungi and Bacteria].

1990 ◽  
Author(s):  
A. Sivanesan
Keyword(s):  
Saudi Arabia ◽  
Puerto Rico ◽  
Geographical Distribution ◽  
New Caledonia ◽  
Solomon Islands ◽  
Crown Rot ◽  
Dry Rot ◽  
Leaf Spots ◽  
Seed Decay ◽  
Windward Islands

Abstract A description is provided for Cochliobolus verruculosus. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Avena, Buchloë, Chloris, Cynodon, Eleusine, Hordeum, Oryza, Leptochloa, Paspalum, Pennisetum, Saccharum, Sorghum, Triticum, Typha and Zea. Also from many dicotyledenous hosts. DISEASE: Leaf spots, dry-rot of pineapple (61, 6510; 68, 2757), associated with crown rot of banana (54, 4051) and seed decay of sugarcane (63, 3545). GEOGRAPHICAL DISTRIBUTION: Australia, Bangladesh, Burma, Cuba, Egypt, Fiji, Ghana, India, Indonesia, Israel, Jamaica, Japan, Kenya, Malawi, Malaysia, Nepal, New Caledonia, New Zealand, Nicaragua, Nigeria, Pakistan, Peru, Puerto Rico, Saudi Arabia, Solomon Islands, Sri Lanka, Tanzania, Thailand, USA, Venezuela, Windward Islands, Yemen, Zambia. TRANSMISSION: By wind-borne conidia and seed-borne (67, 4997).

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