Acidovorax avenae subsp. citrulli. [Descriptions of Fungi and Bacteria].

1994 ◽  
Author(s):  
G. S. Saddler
Keyword(s):  
Geographical Distribution ◽  
Cucumis Melo ◽  
Large Firm ◽  
Citrullus Lanatus ◽  
Natural Host ◽  
Seedling Blight ◽  
Infected Seed ◽  
Leaf Spots

Abstract A description is provided for Acidovorax avenae subsp. citrulli. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Citrullus lanatus is the natural host. Cucumis melo (61, 1997) has also been noted and other members of the Cucurbitaceae can produce symptoms following inoculation. DISEASE: Two distinct symptoms have been observed: 1) leaf spots, forming water-soaked lesions on the cotyledons of seedlings; 2) watermelon fruit blotch, forming large, firm, water-soaked lesions with irregular margins on fruit. As lesions age on fruit the periderm can crack and bacterial ooze is produced. The pathogen is thought to enter the fruit through stomata; immature fruits in particular are infected (Frankle et al., 1993). GEOGRAPHICAL DISTRIBUTION: Australia, Guam, Tinian, (possibly Malaysia and Indonesia, IMI records), USA (AR, DE, Florida, GA, IW, IN, MD, NC, SC). TRANSMISSION: The spread of seedling blight appears to be seed borne (Sowell & Schaad, 1979). No information on the spread of watermelon fruit blotch exists at present, though dissemination by infected seed seems likely.

Acidovorax avenae subsp. citrulli. [Distribution map].

1999 ◽  
Author(s):  
Keyword(s):  
North Carolina ◽  
South Carolina ◽  
North America ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Mariana Islands ◽  
Distribution Map ◽  
Northern Mariana Islands ◽  
New Distribution

Abstract A new distribution map is provided for Acidovorax avenae subsp. citrulli (Schaad et al.) Willems et al. Bacteria Hosts: Watermelon (Citrullus lanatus), melon (Cucumis melo) and other cucurbits. Information is given on the geographical distribution in ASIA, Israel, Turkey, NORTH AMERICA, USA, Alabama, Arkansas, California, Delaware, Florida, Georgia, Indiana, Iowa, Maryland, Mississippi, Missouri, North Carolina, Oklahoma, Oregon, South Carolina, Texas, OCEANIA, Australia, Queensland, Guam, Northern Mariana Islands.

Cochliobolus miyabeanus. [Descriptions of Fungi and Bacteria].

1971 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Primary Infection ◽  
French Polynesia ◽  
Brown Spot ◽  
Seed Infection ◽  
Seedling Blight ◽  
Late Afternoon ◽  
Leaf Spots ◽  
Cochliobolus Miyabeanus

Abstract A description is provided for Cochliobolus miyabeanus. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Oryza sativa and other species of Oryza. DISEASE: Brown spot and seedling blight of rice. Oval leaf spots up to 1 cm long, at first usually brown, sometimes purplish, later forming white to grey centres, spots may coalesce and leaves wither. Glumes may be spotted, becoming velvety with sporulation. Infected seed is shrivelled and discoloured; coleoptiles bear lesions which can also occur on the roots of seedlings. GEOGRAPHICAL DISTRIBUTION: Widespread (CMI Map 92, ed. 3, 1966). Records not yet mapped: Angola, Cambodia, Chad, France (S.), French Polynesia, Hong Kong, Laos, Malawi, Nepal, Rhodesia. TRANSMISSION: Seed infection is important (mycelium remaining viable for up to 3 yr) and is probably responsible for most of the primary infection in young crops (9: 556; 34: 104). Grain is directly attacked and kernels in the flowering and milk stages are more susceptible than those in the soft dough and mature stages (45, 2834; 46, 317). Conidia are air-dispersed showing a diurnal periodicity with a max. in the late afternoon (43, 1017; 48, 3486).

Watermelon silver mottle orthotospovirus. [Distribution map].

2018 ◽  
Author(s):  
Keyword(s):  
Solanum Lycopersicum ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Mottle Virus ◽  
Ryukyu Archipelago ◽  
Distribution Map ◽  
Watermelon Silver Mottle Virus ◽  
New Distribution

Abstract A new distribution map is provided for Watermelon silver mottle virus. Bunyavirales: Bunyaviridae: Orthotospovirus. Hosts: Cucurbitaceae especially watermelon (Citrullus lanatus), melon (Cucumis melo), tomato (Solanum lycopersicum), Capsicum. Information is given on the geographical distribution in Asia (China, Guangdong, Yunnan, India, Maharashtra, Japan, Kyushu, Ryukyu Archipelago, Taiwan, Thailand).

Fusarium oxysporum f.sp. melonis. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
P. Holliday
Keyword(s):  
North America ◽  
Fusarium Oxysporum ◽  
Cucumis Sativus ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Cucurbita Pepo ◽  
Citrullus Lanatus ◽  
Damping Off ◽  
Leaf Chlorosis ◽  
Vascular Elements

Abstract A description is provided for Fusarium oxysporum f.sp. melonis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Cucumis melo. DISEASE: Causes a destructive wilt of muskmelon and cantaloupe. The casaba or winter melon is resistant (e.g. var. Honey Dew). Infection occurs on seedlings (pre-emergence and post-emergence damping-off) and older plants (leaf chlorosis, stunting and generai wilt). Streaks appear on the stems up to 0.6 m long; they become necrotic and bear the salmon-pink sporulating masses. In some cases stem cracks develop and a brownish exudate forms. The vascular elements become orange-red and the fruit is much reduced in size. The formae speciales of F. oxysporum from muskmelon and watermelon (Citrullus lanatus) will each attack the seedlings of both hosts, but older plants are susceptible only to their own f.sp. Generally the virulence of a given isolate is greater on its original host (12: 744; 27: 307; 31: 473; Leach, 1936). Cucumber (Cucumis sativus) and marrow (Cucurbita pepo) are resistant (39: 117). GEOGRAPHICAL DISTRIBUTION: Generai in North America (U.S.A., Canada) and Europe. Also reported from Asia (Formosa, Iraq, Japan, Philippines) and Australasia (Australia). TRANSMISSION: Through soil and seed (Leach, 1936).

Carpomya pardalina. [Distribution map].

2013 ◽  
Author(s):  
Keyword(s):  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Distribution Map ◽  
Central Russia ◽  
Southern Russia ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Carpomya pardalina Bigot. Diptera: Tephritidae. Hosts: melon (Cucumis melo), watermelon (Citrullus lanatus). Information is given on the geographical distribution in Europe (Cyprus, Russia, Central Russia, Southern Russia, Ukraine), Asia (Afghanistan, Armenia, Azerbaijan, Georgia, India, Bihar, Punjab, Iran, Iraq, Israel, Jordan, Kazakhstan, Kyrgyzstan, Lebanon, Pakistan, Syria, Tajikistan, Turkey, Turkmenistan, Uzbekistan).

Alternaria cucumerina. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
South Africa ◽  
New Zealand ◽  
Sierra Leone ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Ripe Fruit ◽  
In Transit ◽  
And Storage ◽  
Light Green

Abstract A description is provided for Alternaria cucumerina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Citrullus lanatus, Cucumis melo, C. sativus, Cucurbita spp. DISEASE: Leaf spot of cucumber and melon (watermelon, musk melon, cantaloupe). Symptoms begin as yellow-brown flecks, 0.5 mm diam., on the upper surface of usually the crown leaves. They have a light green halo and gradually enlarge, becoming coalescent, with concentric ringing more commonly on the upper surface. Death of the leaves can be followed by lesions, several cm diam., forming on ripe fruit. These become covered with a dark, olive-green, conidial mass; they may be sunken and also show the concentric zonation. Infection of fruit in the field may be aggravated by exposure to sunlight (10: 431). Infection of stems or petioles does not occur. The pathogen can also cause decay in transit and storage, especially of melons and squash. GEOGRAPHICAL DISTRIBUTION: Arabia, Australia, Canada, Chile, Cuba, Cyprus, England, France, Japan, Kenya, Libya, Mozambique, New Zealand, Nigeria, Rhodesia, Rumania, Sierra Leone, South Africa, Sudan, Thailand, Trinidad, U.S.A., Venezuela, Zambia. TRANSMISSION: Seed may become contaminated with conidia. Survival from season to season is probably through mycelium in host debris. No air dispersal studies have been reported.

Watermelon chlorotic stunt virus. [Distribution map].

2016 ◽  
Author(s):  
Keyword(s):  
Saudi Arabia ◽  
Solanum Lycopersicum ◽  
Cucumis Sativus ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Distribution Map ◽  
Virus Distribution ◽  
New Distribution ◽  
Watermelon Chlorotic Stunt Virus

Abstract A new distribution map is provided for Watermelon chlorotic stunt virus. Geminiviridae: Begomovirus. Hosts: Cucurbitaceae including watermelon (Citrullus lanatus), melon (Cucumis melo) and cucumber (Cucumis sativus) and Solanaceae including tomato (Solanum lycopersicum). Information is given on the geographical distribution in Asia (Iran, Israel, Jordan, Lebanon, Oman, Saudi Arabia and Yemen) and Africa (Sudan).

Setosphaeria rostrata. [Descriptions of Fungi and Bacteria].

1978 ◽  
Author(s):  
K. H. Anahosur
Keyword(s):  
Central America ◽  
Geographical Distribution ◽  
Primary Infection ◽  
Foot Rot ◽  
Ear Rot ◽  
Damping Off ◽  
Seedling Blight ◽  
Stalk Rot ◽  
Long Period ◽  
Leaf Spots

Abstract A description is provided for Setosphaeria rostrata. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On graminicolous hosts and on Amaryllis, Carica, Cucumis, Jasminum, Nicotiana and from soil. DISEASE: Causes leaf spots, foot rot of wheat (56, 2446), seedling blight of Cynodon (46, 2051), leaf blight of Eleusine (46, 1263), damping-off of sugarcane seedlings (50, 1562l), stalk rot (53, 2167) and ear rot of maize, blackening of seeds and seed germination failure (34, 91; 51, 2435). GEOGRAPHICAL DISTRIBUTION: Africa (Mauritius, Nigeria, S. Africa, Sudan); Asia (China, India, Israel, Pakistan); Central America (Puerto Rico); Europe (Denmark); North America (USA). TRANSMISSION: The fungus is soil-borne and can survive saprophytically for a long period (43, 398). Also seed transmissible (51, 2435). Conidia are produced abundantly in moist conditions and are dispersed by wind and rain, and act as a source of primary infection. Many grasses and weeds act as collateral hosts (39, 321).

Alternaria padwickii. [Descriptions of Fungi and Bacteria].

1972 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Oryza Sativa ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
Seedling Blight ◽  
Leaf Spots ◽  
Necrotic Spotting

Abstract A description is provided for Alternaria padwickii. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Oryza sativa. DISEASE: Stackburn, seedling blight and leaf spot of rice (Oryza sativa). Necrotic spotting on the roots and coleoptile leads to death of seedlings. Leaf spots are circular or oval, up to 1 cm diam., with a dark margin; the centre becomes pale and bears the black sclerotia. Spotting occurs on the glumes, the kernels are invaded and become discoloured and shrivelled. Sclerotia are formed in all infected areas (27: 447). GEOGRAPHICAL DISTRIBUTION: Widespread in S.E. Asia and parts of Oceania but not reported from Australia; it also occurs in Egypt, Malagasy Republic, Nigeria and Surinam (CMI Map 314, ed. 3, 1972). TRANSMISSION: By seed, up to 79% infection of seed samples has been found (25: 182). The pathogen probably survives between crops on the straw.

Cucurbit chlorotic yellows virus. [Distribution map].

2016 ◽  
Author(s):  
Keyword(s):  
Saudi Arabia ◽  
Cucumis Sativus ◽  
Geographical Distribution ◽  
Cucumis Melo ◽  
Citrullus Lanatus ◽  
Distribution Map ◽  
Virus Distribution ◽  
New Distribution ◽  
Distribution In Europe ◽  
Cucurbit Chlorotic Yellows Virus

Abstract A new distribution map is provided for Cucurbit chlorotic yellows virus. Hosts: melon (Cucumis melo), cucumber (Cucumis sativus), watermelon (Citrullus lanatus) and (Cucurbita spp.). Information is provided on the geographical distribution in Europe (Greece, Crete), Asia (China, Hebei, Jiangsu, Shandong, Zhejiang, Iran, Japan, Honshu, Kyushu, Lebanon, Saudi Arabia and Taiwan) and Africa (Egypt and Sudan).

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