Myrothecium roridum. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
M. Fitton
Keyword(s):  
Geographical Distribution ◽  
Trifolium Pratense ◽  
Tomato Fruit ◽  
Solanum Melongena ◽  
Damping Off ◽  
Hibiscus Esculentus ◽  
Myrothecium Roridum ◽  
Stem Lesions ◽  
Stem Cankers ◽  
Soil Level

Abstract A description is provided for Myrothecium roridum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Plurivorous. On Antirrhinum, Coffea, Cucurbitaceae, Cyamopsis psoraloides, Gardenia, Gloxinia, Gossypium, Hibiscus esculentus, Hypocyrta, Lycopersicon esculentum, Molucella, Sesamum indicum, Solanum melongena, Trifolium pratense, Vigna unguiculata, Vinca, Viola. DISEASE: Commonly causing necrotic lesions or shot holes on leaves but can also occur on petioles, stems and fruit. Small, sometimes water-soaked, lesions increase to about 2.5 cm diam. ; they may be zonate and coalesce, defoliating the plant. On many hosts infection is most serious under nursery or glasshouse contitions. Infection leads to stem lesions, dieback of the crown and decay at soil level; this may resemble typical damping-off symptoms. Stem cankers have been reported on cotton and sunken lesions on the fruit of cantaloupe. On tomato fruit a firm, black rot develops, with a sharply delimited border between healthy and diseased tissue; the rotted part can be removed readily in one piece (25: 345; 35: 19; 36: 528; 41: 199; 44: 1586, 3367; 49: 503). GEOGRAPHICAL DISTRIBUTION: Widespread (CMI Map 458, ed. 1, 1969); possibly more serious in warmer regions. TRANSMISSION: Probably a common soil saprophyte, with the capacity to become actively parasitic under conditions not yet clearly definable. Infection of cotton bolls and carpel walls is reported (43, 3382b). Seed of C. psoraloides when inoculated gave only 16% germination compared with 93% for the uninoculated seed.

Pythium deliense. [Descriptions of Fungi and Bacteria].

1966 ◽  
Author(s):  
G. M. Waterhouse
Keyword(s):  
Geographical Distribution ◽  
West Indies ◽  
Cucurbita Pepo ◽  
Carica Papaya ◽  
Solanum Melongena ◽  
Saccharum Officinarum ◽  
Fruit Rot ◽  
Damping Off ◽  
Tomato Seedlings ◽  
Hibiscus Esculentus

Abstract A description is provided for Pythium deliense. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Hibiscus esculentus, Lycopersicon esculentum, Nicotiana tabacum and Saccharum officinarum. Also on Capsicum annuum, Carica papaya, Cucumis sativus, Cucurbita pepo, Datura fastuosa, Petunia sp. and Solanum melongena on inoculation (Rangaswami, 1959; Herb. IMI). DISEASE: Causing damping-off of tomato seedlings, stem-burn of tobacco and fruit rot of okra. GEOGRAPHICAL DISTRIBUTION: Asia (Indonesia, Sumatra) and Australasia & Oceania (Australia, New Guinea, Papua); North America (? United States); Central America & West Indies (? N˜caragua). TRANSMISSION: Soil-borne.

Phomopsis vexans. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Geographical Distribution ◽  
West Indies ◽  
Solanum Melongena ◽  
Fruit Rot ◽  
Primary Sources ◽  
Damping Off ◽  
The West ◽  
Leaf Spots ◽  
Phomopsis Vexans ◽  
Stem Lesions

Abstract A description is provided for Phomopsis vexans[Diaporthe vexans]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Solanum melongena, S. wendlandii. DISEASE: The only economic host is eggplant or brinjal (Solanum melongena) and the disease is variously known as tip over, stem blight or canker, leaf blight or spot and fruit rot; damping-off can also take place. Leaf spots (up to 3 cm diam.) are conspicuous, irregular in outline and may coalesce; lower leaves may be affected first. In stem lesions the cortex dries and cracks, plants become stunted and girdling cankers cause death. Fruit spots are pale, sunken, conspicuous and may affect the whole fruit; fruit may drop or remain attached, becoming mummified after a soft decay. Pycnidia are abundant. GEOGRAPHICAL DISTRIBUTION: Widespread in N. America, the West Indies, and E. and central Asia, also in Africa (Senegal, Tanzania, Zambia) and Mauritius (CMI Map 329, ed. 2, 1968). The record from Australia (NSW) should be deleted. Additional records not yet mapped are: Brunei, Haiti, Iran, Iraq, Rumania. TRANSMISSION: Host debris and seed from infested fruit are primary sources of inoculum. Naturally infected seed germinates less well and more slowly (20: 621; 22: 511).

Phomopsis vexans (Phomopsis blight of eggplant).

2021 ◽  
Author(s):  
Keyword(s):  
Solanum Melongena ◽  
Seed Transmission ◽  
Fruit Rot ◽  
Damping Off ◽  
Cultural Methods ◽  
Large Numbers ◽  
Historical Distribution ◽  
Poor Seed ◽  
Phomopsis Vexans ◽  
Stem Lesions

Abstract P. vexans is a pynicidial anamorph with a teleomorph in the genus Diaporthe. Easily seedborne and producing large numbers of conidia, it causes disease in Solanum melongena [aubergine/brinjal/eggplant], its only significant host. This ranges from poor seed germination and damping-off of seedlings, to leaf and stem lesions and to fruit rot, both in the field and after harvest. The fungus has been reported from widely distributed areas of most continents, but only a few of those are in Europe and Africa, even though the climates are favourable. Seed transmission may explain its broad historical distribution, but limitation of its host range to a non-staple vegetable crop can allow for its avoidance and eradication by cultural methods. As a result, perhaps, it does not appear often on lists of restricted pathogens, even though it may cause yield losses of more than 50%.

Calonectria scoparia. [Descriptions of Fungi and Bacteria].

1993 ◽  
Author(s):  
P. W. Crous
Keyword(s):  
South Africa ◽  
Pisum Sativum ◽  
Geographical Distribution ◽  
Root Rot ◽  
Persea Americana ◽  
Damping Off ◽  
Araucaria Heterophylla ◽  
Splash Dispersal ◽  
Shoot Blight ◽  
Stem Cankers

Abstract A description is provided for Calonectria scoparia. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Acacia spp. (68, 1566), Araucaria heterophylla, Eucalyptus spp., Fragaria sp., Luma sp., Medicago sativa, M. truncatula, Persea americana, Pinus spp., Pisum sativum, Rhododendron spp., Prunus sp., Syncarpia gummifera. DISEASE: Damping off, root rot, cutting rot, stem cankers, leaf spotting, seedling and shoot blight. GEOGRAPHICAL DISTRIBUTION: Australia, Brazil, India, Kenya, Mauritius, South Africa. TRANSMISSION: Wind and splash dispersal.

Alternaria zinniae. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. C. David
Keyword(s):  
South Africa ◽  
North America ◽  
South Dakota ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Wind Dispersal ◽  
Damping Off ◽  
Airborne Conidia ◽  
Hibiscus Esculentus ◽  
Sphaeranthus Indicus

Abstract A description is provided for Alternaria zinniae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Ageratum, Aster, Bidens, Calendula, Callistephus, Chrysanthemum, Coreopsis, Cosmos, Dahlia, Gaillardia, Galinsoga, Gerbera, Helianthus, Notonia, Parthenium, Sphaeranthus indicus, Tagetes, Tithonia, Volutarella, Xanthium, Zinnia. Also recorded are a number of non-compositae hosts such as bean (50, 3295), rape (43, 1212b), Clarkia, Hibiscus esculentus (66. 4729), pawpaws (66. 4729) and seeds of tobacco (64, 1748) but these reports should be regarded with some doubt. Simmons (1982) also reports other hosts like Gentiana, Papaver and Reseda. DISEASE: Leaf spot of Zinnia. The fungus attacks the leaves, stems of its host and can cause damping-off of seedlings where both the root and the stems of the plant may be affected. In older plants the fungus attacks the older leaves and then spreads to the younger leaves, and when the attack is severe the spots may become confluent. GEOGRAPHICAL DISTRIBUTION: Africa: Egypt, Ethiopia, Ghana, Kenya, Libya, Malawi, Mauritius, Sierra Leone, South Africa, Sudan, Tanzania, Uganda, Zambia, Zimbabwe. Asia: Brunei, China (Liaoning). India, Indonesia (Borneo), Korea, Nepal, Pakistan. Australasia & Oceania: Australia. Europe: Cyprus. Denmark, France, Germany, Hungary, Italy, Norway, Poland, Portugal, Romania, The Netherlands. Central & North America: Bermuda, Canada, Jamaica, USA (Hawaii, Illinois, South Dakota). TRANSMISSION: On seeds by wind dispersal of airborne conidia.

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.

scholarly journals Pathogenicity of Myrothecium roridum and Rhizoctonia solani in nursery coffee plants

1969 ◽  
Vol 80 (3) ◽  
pp. 135-143
Author(s):  
Rocío del P. Rodríguez ◽  
Luis Sánchez ◽  
Wigmar González ◽  
Osvaldo Bosques
Keyword(s):  
Rhizoctonia Solani ◽  
Root Rot ◽  
Adventitious Roots ◽  
Disease Symptoms ◽  
Coffee Plants ◽  
Myrothecium Roridum ◽  
Stem Lesions ◽  
Stem Cankers

Stem cankers and root rot of coffee plants were detected in the nurseries. Proliferation of adventitious roots at the base of the stems was also observed. Several fungi were isolated from the root and stem lesions and pathogenicity trials were conducted under the humid conditions of the shadehouse. Typical disease symptoms were reproduced by Myrothecium roridum and Rhizoctonia solani in the root and in the stem of the inoculated plants.

Ascochyta phaseolorum. [Descriptions of Fungi and Bacteria].

1966 ◽  
Author(s):  
B. C. Sutton
Keyword(s):  
Geographical Distribution ◽  
Cannabis Sativa ◽  
Solanum Melongena ◽  
Leaf Spots ◽  
Target Spot ◽  
North Borneo ◽  
Hibiscus Esculentus ◽  
Rain Drops ◽  
Light Green ◽  
Dead Tissue

Abstract A description is provided for Ascochyta phaseolorum[Phoma exigua var. exigua]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Canavalia ensiformis, Glycine max, Lablab (Dolichos) niger, Phaseolus acutifolius, P. atropurpureus, P. aureus, P. calcaratus, P. lathyroides, P. limensis, P. lunatus, P. mungo, P. nanus, P. richardianus, P. trilobus, P. vulgaris, Vigna catjang', V. coerulea, V. sesquipedalis, V. sinensis, V. unguiculata, Voandezia subterranea. Also by inoculation on Althaea rosea, Cannabis sativa, Capsicum annuum, Fagopyrum sagittatum, Gossypium spp., Hibiscus esculentus, Lycopersicon esculentum, Malva verticillata, Nicotiana tabacum, Solanum melongena, Vicia sativa (Crossan, 1958; Zherbele, 1958). DISEASE: Leaf spot (or blotch) of bean. Young leaf spots are irregularly circular with grey to brown centres surrounded by a border of light green-yellow tissue. Other spots are light to dark brown and frequently zonate, marginal, terminal or discrete, cracking in the centre when the dead tissue finally drops out, 3-5 cm diam. Lesions common on pulvini result in considerable defoliation. Ascochyta phaseolorum causes target-spot lesions on several genera in the Leguminosae. Such symptoms on Phaseolus spp. are indistinguishable from the drab, zonate lesions of A. boltshauseri, but are distinct from those of A. pinodella L. K. Jones which are purplish-brown, indistinctly zonate and irregular, and A. pisi Lib. which are not zonate but light brown with a darker distinct margin. Also destructive on pods, stems and roots of seedlings. GEOGRAPHICAL DISTRIBUTION: Africa (Congo, Ethiopia, Kenya, Malawi, Rhodesia, Sudan, South Africa, Tanzania, Uganda, Zambia); Asia (China, India, Japan, Malaya, North Borneo, Pakistan, Sarawak), Australasia & Oceania (New Guinea, Solomon Is.); Europe (Denmark, Great Britain, Czechoslovakia, Netherlands, Sweden, U.S.S.R.); North America (U.S.A.); South America (Peru). TRANSMISSION: Seed borne, persisting in a viable condition for 24 years (26: 276). Viability and virulence also unimpaired after storage in culture at 1°C or 10-12°C for 20-25 months (41: 374). The pathogen may spread by infected haulms and by spores disseminated by splashing rain drops from infected seedlings. Also spread in pods of harvested plants stored in stooks in the field in cool, moist, weather (Hubbeling, 1955).

Pythium myriotylum. [Descriptions of Fungi and Bacteria].

1966 ◽  
Author(s):  
G. M. Waterhouse
Keyword(s):  
Geographical Distribution ◽  
Robinia Pseudoacacia ◽  
Solanum Melongena ◽  
Aerial Mycelium ◽  
Zingiber Officinale ◽  
Soft Rot ◽  
Fruit Rot ◽  
Ananas Comosus ◽  
Damping Off ◽  
Pythium Myriotylum

Abstract A description is provided for Pythium myriotylum. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Ananas comosus, Arachis hypogaea, Carica papaya, Citrullus vulgaris, Cucumis sativus, Lycopersicon esculentum, Medicago sativa, Nicotiana tabacum, Oryza sativa, Phaseolus vulgaris, Robinia pseudoacacia, Solanum melongena, Zingiber officinale. DISEASES: Damping-off of seedlings including tobacco, black locust and watermelon; seedling root rot of lucerne, papaw and tomato; soft rot of ginger rhizomes and fruit rot of watermelon, cucumber and eggplant. GEOGRAPHICAL DISTRIBUTION: Common only in warm climates: Africa (Madagascar, Nigeria, Sierra Leone, South Africa); Asia (Ceylon, India, Sumatra); Australasia (Australia); North America (U.S.A.). TRANSMISSION: Soil-borne. Incidence reported highest in virgin soil containing abundant decomposing organic matter (37: 244). Spread by aerial mycelium under conditions of high humidity (10: 210). Transport over long distances on ginger rhizomes has been reported (22: 197).

Xanthomonas campestris pv. alfalfae. [Descriptions of Fungi and Bacteria].

1981 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Geographical Distribution ◽  
Xanthomonas Campestris ◽  
Trifolium Pratense ◽  
Infested Soil ◽  
Lablab Purpureus ◽  
Trifolium Incarnatum ◽  
Small Water ◽  
Medicago Lupulina ◽  
Water Splash ◽  
Stem Lesions

Abstract A description is provided for Xanthomonas campestris pv. alfalfae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Medicago sativa, which it infects naturally. A Romanian strain naturally infects Trifolium pratense. By artificial inoculation Melilotus indica, Pisum sativum and Trigonella foenum-graecum are readily infected. Other hosts by inoculation are: Lablab purpureus, Medicago truncatula, M. scutellata, Phaseolus vulgans, Trifolium incarnatum, Vicia benghalensis and Vigna mungo (all reported by Moffett & Irwin), Clitoria ternatea and Lupinus termis (48, 3266), and Glycine max, Medicago lupulina, Melilotus alba, M. officinalis, Trifolium pratense and Vicia sativa (all reported by Stuteville & Sorensen, 1966). DISEASE: Leaf spot of lucerne. Small water-soaked spots enlarge, become brown and may coalesce to form areas of dead, dry, papery tissue. Lesions may be interveinal, along the midribs, or at the margins of the leaflets. Stem lesions also occur (36: 650; Moffett & Irwin, 1975). These start as water-soaked circular spots about 2 mm diameter. They usually coalesce to form long lesions which may extend from one node to the next. The colour of these lesions becomes dark purplish, with a greenish-yellow central region and a greasy margin. When seedlings are attacked in damp conditions post-emergence damping off occurs (Stuteville & Sorensen, 1966). GEOGRAPHICAL DISTRIBUTION: Sudan (39: 3), India (Bombay State, 35: 287), Japan (51, 1579), USSR (Republic of Georgia, 53, 3747), Australia (Queensland, 55, 789), Romania (47, 1912), USA (Wisconsin, 14: 766; Kansas, 52, 3367; Iowa, 36: 650; probably Maryland, 57, 657), Nicaragua (42: 467). TRANSMISSION: By water-splash in the nursery and by wind-blown infested soil particles in the field (53, 2931). The pathogen survives in plant debris and soil from August to June in Kansas conditions, and in dry hay for many years (52, 3367).

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